SENIOR HOUSING PROPERTIES TRUST
S-11/A, 1999-09-07
REAL ESTATE INVESTMENT TRUSTS
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    As filed with the Securities and Exchange Commission on September 7, 1999
                                                     Registration No.  333-69703


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                        PRE-EFFECTIVE AMENDMENT NO. 3 to
                                    FORM S-11
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933



                         SENIOR HOUSING PROPERTIES TRUST
             (Exact name of registrant as specified in its charter)


                                400 Centre Street
                           Newton, Massachusetts 02458
                                 (617) 796-8350
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)


                           David J. Hegarty, President
                         Senior Housing Properties Trust
                                400 Centre Street
                           Newton, Massachusetts 02458
                                 (617) 796-8350
      (Name, address, including zip code, and telephone number, including a
                        rea code, of agent for service)


                                   Copies to:

                       Alexander A. Notopoulos, Jr., Esq.
                            Sullivan & Worcester LLP
                             One Post Office Square
                           Boston, Massachusetts 02109
                                 (617) 338-2800


     Approximate  date of  commencement  of  proposed  sale to the  public:  The
securities  will be distributed as soon as practicable  after the effective date
of this Registration Statement.
     If this form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the  Securities  Act,  check the following box and
list the Securities Act registration  statement number of the earlier  effective
registration statement for the same offering. / /
     If this form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. / /
     If this form is a  post-effective  amendment  filed pursuant to Rule 462(d)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. / /
     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
check the following box. / /

                                 -------------


    The  Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities Act of 1933, or until this  Registration  Statement  shall become
effective  on such  date  as the  Securities  and  Exchange  Commission,  acting
pursuant to Section 8(a), may determine.
<PAGE>
The information contained in this prospectus is not complete and may be changed.
No one may buy or sell these securities  until the registration  statement filed
with the Securities and Exchange Commission is effective. This prospectus is not
an offer to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.

                              Subject to Completion
                 Preliminary prospectus dated September 7, 1999

PROSPECTUS                    HRPT PROPERTIES TRUST

                   SPIN-OFF OF SENIOR HOUSING PROPERTIES TRUST

                THROUGH DISTRIBUTION OF 13,190,763 COMMON SHARES

To the Shareholders of HRPT Properties Trust:


     On or shortly after  September ___, 1999, we will  distribute to you shares
of our subsidiary,  Senior Housing Properties Trust, as a special  distribution.
You will receive one share of Senior Housing for every 10 shares of HRPT you own
on September ___, 1999, the record date for the spin-off.

     We own a  diversified  portfolio  of 175  office  buildings  that cost $2.5
billion and 93 senior housing properties that cost $770 million. We believe that
there are attractive investment opportunities available in both office buildings
and senior housing properties.  By distributing the Senior Housing shares to our
shareholders  we will create two separately  focused  companies which we believe
can take better advantage of their respective  growth  opportunities  and may be
more attractive to investors than a combined company.  Our board of trustees has
unanimously  approved  the  spin-off  as  being  in the  best  interests  of our
shareholders.


     Senior  Housing's  shares will be  separately  listed on the New York Stock
Exchange under the symbol "SNH." HRPT's shares will continue to trade on the New
York Stock  Exchange  under the symbol  "HRP." The spin-off of Senior  Housing's
shares will be the first public  distribution of those shares.  Accordingly,  we
can provide no assurance to you as to what their market price may be.

     This  prospectus  includes  a  description  of the  spin-off,  as  well  as
information about HRPT and Senior Housing after the spin-off. You should read it
carefully, especially the section entitled "Risk Factors" that begins on page 13
which describes  various risks  associated with your ownership of Senior Housing
shares, including:

     o    There is no established share price for Senior Housing shares and they
          may trade for less than fair value.
     o    Some of Senior Housing's  tenants have experienced  problems which may
          impair their abilities to pay rent.
     o    Some  of  Senior  Housing's   properties  are  subject  to  burdensome
          regulations.
     o    Senior  Housing's  ability to grow will  depend upon access to capital
          which is not assured.
     o    Senior Housing's investment advisor may have an incentive to recommend
          investments to raise fees.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission  has approved or  disapproved  of the Senior Housing common shares or
determined if this prospectus is truthful or complete. Any representation to the
contrary is a criminal offense.

     We  are  furnishing  this   prospectus  to  provide   information  to  HRPT
shareholders  who will  receive  Senior  Housing  shares in the  spin-off.  This
prospectus is not intended as a  solicitation  to buy or sell any  securities of
HRPT or  Senior  Housing.  On behalf  of HRPT,  we thank you for your  continued
support. On behalf of Senior Housing, we welcome you as a new shareholder.

     Sincerely,



     John A. Mannix                        David J. Hegarty
     President-Elect of HRPT               President of Senior Housing
       Properties Trust                      Properties Trust

                The date of this prospectus is ___________, 1999

<PAGE>
                    HRPT Office Buildings After the Spin-Off


[Photograph of Office Buildings]             [Photograph of Office Buildings]
Bridgepoint Square (5 Buildings)             Cedar-Sinai Medical Office
Austin, TX                                   Towers and Garages (4 buildings)
452,294 Square Feet, Built 1995-1997         Los Angeles, CA
Major Tenants:                               330,715 Square Feet, Built 1978-79
Motorola, Inc.                               Major Tenant:
IBM Corporation                              Cedars-Sinai Medical Center
Southwestern Bell




                        [Photograph of Office Building]
                        Mellon Bank Center
                        Philadelphia, PA
                        1,258,560 Square Feet, Built 1990
                        Major Tenant:
                        Mellon Bank






[Photograph of Office Building]              [Photograph of Office Building]
Herald Square                                Putnam Place (2 Buildings)
Washington, D.C.                             Quincy/Braintree, MA
187,832 Square Feet, Built 1991              222,726 Square Feet, Built 1986-88
Major Tenant: InterAmerican Bank             Major Tenants:
                                             Putnam Investments, Inc.
                                             GMAC

<PAGE>



                    QUESTIONS AND ANSWERS ABOUT THE SPIN-OFF

Q:   How many shares of Senior Housing will I receive?
A:   In the spin-off we will  distribute to you one share of Senior  Housing for
     every 10 shares of HRPT you own.

Q:   What is Senior Housing Properties Trust?
A:   Senior Housing is currently a wholly owned REIT subsidiary of HRPT. It owns
     93 senior  housing  properties  that cost $770  million.  Senior  Housing's
     largest  investment is $326 million in 14 senior living  communities leased
     to Marriott International, Inc. until 2013.

Q:   What are Senior Housing shares worth?
A:   The value of the Senior  Housing  shares you receive will be  determined by
     their  trading  price after the  spin-off.  We do not know what the trading
     price will be and we can provide no assurances as to value.


Q:   What will HRPT do after the spin-off?
A:   HRPT currently owns 175 office buildings that cost $2.5 billion.  After the
     spin-off,  HRPT's  principal  business  will be buying,  owning and leasing
     office buildings.


Q:   What will Senior Housing do after the spin-off?
A:   Senior  Housing  will  own  and  lease  its  portfolio  of  senior  housing
     properties.  It has arranged a bank credit  facility,  some of which may be
     used to purchase new senior housing properties.

Q:   How will distributions change?
A:   We do not expect any change in your combined  distribution rate.  Currently
     HRPT's annual  distribution  is $1.52 per share.  After the spin-off HRPT's
     annual  distribution  will be $1.28 per share,  and Senior Housing's annual
     distribution  will be $2.40 per share.  Because you will receive one Senior
     Housing  share for every 10 HRPT shares you own,  your total  distributions
     will be unchanged as a result of the spin-off.


Q:   Will my shares continue to be listed on the New York Stock Exchange?
A:   HRPT's  shares  will  continue  to be listed on the NYSE  under the  symbol
     "HRP."  Senior  Housing's  shares also will be listed on the NYSE under the
     symbol "SNH."

Q:   What are the tax consequences to me of the spin-off?
A:   The Senior Housing shares you receive will be treated for tax purposes like
     all other  distributions  you receive from HRPT.  The taxable value of this
     distribution  will be  determined  by the trading  price of Senior  Housing
     shares at the time of the spin-off.

Q:   What do I have to do to receive my Senior Housing shares?
A:   No action by you is required. You do not need to pay any money or surrender
     your HRPT  shares to  receive  Senior  Housing  shares.  The number of HRPT
     shares you own will not change. If your HRPT shares are held in a brokerage
     account,  your Senior Housing  shares will be credited to that account.  If
     your HRPT shares are held in certificated form, a certificate  representing
     your Senior  Housing  shares  will be mailed to you. No cash  distributions
     will be paid and fractional shares will be issued as necessary.

Q:   Where can I get more information?
A:   You  should  read  this  prospectus  carefully.  You can  also  call  (877)
     ASK-HRPT.

                                        3

<PAGE>
<TABLE>
<CAPTION>
                                                   Table of Contents

                                                                                                                   Page
<S>                                                                                                                <C>
SUMMARY..............................................................................................................7
     The Companies...................................................................................................7
     Risk Factors....................................................................................................8
     HRPT Growth Strategy............................................................................................9
     Senior Housing Growth Strategy.................................................................................11
     Distributions..................................................................................................11
     Principal Places of Business...................................................................................11
     Summary Pro Forma Consolidated Financial Information...........................................................12


RISK FACTORS........................................................................................................13
     There is no established share price for Senior Housing shares and they
         may trade for less than fair value.........................................................................13
     Some of Senior Housing's tenants have experienced problems which may
         impair their abilities to pay rent.........................................................................13
     Some of Senior Housing's properties are subject to burdensome regulations......................................13
     Senior Housing's ability to grow will depend upon access to capital which is not assured.......................14
     Senior Housing's investment advisor may have an incentive to recommend
         investments to raise fees and there will be other conflicts of interest....................................14
     HRPT may be able to control Senior Housing shareholder decisions...............................................14
     The spin-off will result in benefits to HRPT which could adversely affect Senior Housing.......................14
     Ownership limitations and anti-takeover provisions affecting Senior Housing
         may prevent shareholders from receiving a takeover premium.................................................15
     Real estate ownership creates risks and liabilities............................................................15
     Changes at Marriott could adversely affect Senior Housing......................................................16
     The federal income tax treatment of the spin-off is uncertain..................................................16

THE SPIN-OFF........................................................................................................17
     Key Dates......................................................................................................17
     Distribution Agent.............................................................................................17
     Listing and Trading of Senior Housing Shares.................................................................. 17
     Background and Reasons for the Spin-Off....................................................................... 17
     Manner of Effecting the Spin-Off.............................................................................. 18
     The Transaction Agreement..................................................................................... 18

INFORMATION ABOUT HRPT PROPERTIES TRUST AFTER THE SPIN-OFF......................................................... 20
     HRPT Investments.............................................................................................. 20
         Commercial Office Buildings............................................................................... 20
         Government Office Buildings............................................................................... 20
         Medical and Biotechnology Buildings....................................................................... 20
         Equity Investment in Hospitality Properties Trust......................................................... 20
         Equity Investment in Senior Housing Properties Trust...................................................... 21
         Pending Acquisitions...................................................................................... 21
         Development Activities.................................................................................... 21
     Location of HRPT Office Buildings............................................................................. 22
     HRPT Tenants.................................................................................................. 23
     HRPT Lease Expirations........................................................................................ 25
     HRPT Management............................................................................................... 26
     Additional Information About HRPT............................................................................. 27


                                                           4
<PAGE>
                                                                                                                   Page

INFORMATION ABOUT SENIOR HOUSING PROPERTIES TRUST.................................................................. 28
     General....................................................................................................... 28
     Growth Strategy............................................................................................... 28
     History and Management........................................................................................ 28
     Senior Housing Real Estate Market............................................................................. 29
     Types of Properties........................................................................................... 30
     Government Regulations and Rate Setting....................................................................... 31
     Competition................................................................................................... 33

SENIOR HOUSING DISTRIBUTION POLICY................................................................................. 35

SENIOR HOUSING PROPERTIES.......................................................................................... 38

SENIOR HOUSING TENANTS............................................................................................. 43
     Marriott International, Inc................................................................................... 43
     Integrated Health Services, Inc . .............................................................................44
     Mariner Post-Acute Network, Inc............................................................................... 44
     Brookdale Living Communities, Inc .............................................................................45
     Genesis Health Ventures, Inc . ................................................................................45
     Privately Owned Tenants....................................................................................... 46

SENIOR HOUSING LEASES.............................................................................................. 47
     Lease Terms................................................................................................... 48

SENIOR HOUSING SELECTED HISTORICAL FINANCIAL INFORMATION........................................................... 50

SENIOR HOUSING SELECTED PRO FORMA CONSOLIDATED FINANCIAL INFORMATION............................................... 51

SENIOR HOUSING MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS...................................................................... 51
     Pro Forma Results of Operations............................................................................... 52
     Historical Results of Operations.............................................................................. 52
     Liquidity and Capital Resources............................................................................... 53
     Year 2000..................................................................................................... 54
     Quantitative and Qualitative Disclosures About Market Risk.................................................... 55

SENIOR HOUSING MANAGEMENT.......................................................................................... 57
     Senior Housing Trustees and Executive Officers................................................................ 57
     Committees of the Board of Trustees........................................................................... 58
     Compensation of the Trustees and Officers..................................................................... 58
     Incentive Share Award Plan.................................................................................... 58
     Limitation of Liability and Indemnification................................................................... 59
     Reit Management and the Advisory Agreement.................................................................... 59
     Related Party Transactions.................................................................................... 61

LEGAL PROCEEDINGS.................................................................................................. 62

SENIOR HOUSING POLICIES............................................................................................ 62
     Investment Policies........................................................................................... 62
     Disposition Policies.......................................................................................... 63


                                                           5
<PAGE>
                                                                                                                   Page

     Financing Policies............................................................................................ 63
     Conflict of Interest Policies................................................................................. 64
     Policies with Respect to Other Activities..................................................................... 65

MATERIAL PROVISIONS OF MARYLAND LAW AND OF
SENIOR HOUSING'S DECLARATION OF TRUST AND BYLAWS................................................................... 67
     Trustees...................................................................................................... 67
     Advance Notice of Trustee Nominations and New Business........................................................ 67
     Meetings of Shareholders...................................................................................... 68
     Liability and Indemnification of Trustees and Officers........................................................ 68
     Shareholder Liability......................................................................................... 69
     Maryland Asset Requirements................................................................................... 69
     Transactions with Affiliates.................................................................................. 69
     Voting by Shareholders........................................................................................ 69
     Restrictions on Transfer of Shares............................................................................ 69
     Business Combinations......................................................................................... 71
     Control Share Acquisitions.................................................................................... 72
     Amendment to the Declaration of Trust, Dissolution and Mergers................................................ 73
     Anti-takeover  Effect of Maryland Law and of the Declaration of Trust and Bylaws.............................. 73

DESCRIPTION OF SENIOR HOUSING SECURITIES........................................................................... 74
     General....................................................................................................... 74
     Common Shares................................................................................................. 74

SENIOR HOUSING PRINCIPAL SHAREHOLDERS.............................................................................. 75

FEDERAL INCOME TAX AND ERISA CONSEQUENCES.......................................................................... 75
     General....................................................................................................... 75
     Federal Income Tax Consequences of the Spin-Off to Our Shareholders........................................... 77
     Federal Income Tax Consequences of the Spin-Off to HRPT....................................................... 80
     Federal Income Taxation of Senior Housing and its Shareholders................................................ 84
     Backup Withholding and Information Reporting.................................................................. 95
     Other Tax Consequences........................................................................................ 96
     ERISA Consequences for Senior Housing and its Shareholders.................................................... 97

LEGAL MATTERS.....................................................................................................  99

EXPERTS...........................................................................................................  99

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
ACCOUNTING AND FINANCIAL DISCLOSURE...............................................................................  99

FORWARD LOOKING STATEMENTS........................................................................................  99

WHERE YOU CAN FIND ADDITIONAL INFORMATION.........................................................................  99

INDEX TO FINANCIAL STATEMENTS..................................................................................... F-1

</TABLE>

                                                           6


<PAGE>
                                     SUMMARY

     This  summary  highlights  some  information  contained  elsewhere  in this
prospectus.  This summary may not contain all the information about the spin-off
which may be  important  to you. To better  understand  the  spin-off you should
carefully  review this entire  document.  References in this prospectus to "we,"
"us,"  "our"  or  "HRPT"  mean  HRPT  Properties  Trust  and  its  subsidiaries.
References to "Senior  Housing"  mean Senior  Housing  Properties  Trust and its
subsidiaries.  Unless  otherwise  indicated,  the information  presented in this
prospectus  reflects  events  which have  occurred or will have  occurred by the
effective date of the registration  statement of which this prospectus is a part
and  assumes  that  none  of  HRPT's  subordinated  convertible  debentures  are
converted into HRPT shares before the spin-off.

                                  THE COMPANIES


     We are a real estate  investment  trust,  a REIT,  which owns a diversified
portfolio of 175 office  buildings  costing  $2.5 billion and 93 senior  housing
properties costing $770 million.  We also own four million shares of Hospitality
Properties  Trust,  another  NYSE-listed  REIT which invests in hotels,  that we
founded in 1995. Our current book capitalization includes $1.8 billion of equity
and $1.2 billion of debt. Our current  distribution  rate is $1.52 per share per
year, payable $0.38 per share per quarter.


                            HRPT Before the Spin-Off

[Graphic Omitted - Flow Chart


175 office buildings, $2.5 billion cost
93 senior housing properties, $770 million cost
4 million shares of Hospitality Properties Trust

     --   Distributions: $1.52/share per annum
     --   131.9 million shares outstanding
     --   $981 million senior debt outstanding plus $205 million
          subordinated debt]

     Our subsidiary,  Senior Housing, owns all of our senior housing properties.
Senior  Housing is also a REIT.  We own all 26  million  Senior  Housing  shares
outstanding  and Senior Housing owes us $200 million.  We will  distribute  13.2
million of our Senior  Housing  shares to our  shareholders  on the basis of one
Senior Housing share for every 10 HRPT shares held. Senior Housing has entered a
new bank credit  facility for $350  million;  it will borrow $200 million  under
this facility and pay its debt to us; and $150 million will be available for new
investments by Senior Housing. After the spin-off we will establish a new annual
distribution rate of $1.28 per HRPT share,  payable $0.32 per share per quarter;
and Senior  Housing will establish a new annual  distribution  rate of $2.40 per
share, payable $0.60 per share per quarter.


                             HRPT After the Spin-Off
[Graphic Omitted - Flow Chart


175 office buildings, $2.5 billion cost
4 million shares of Hospitality Properties Trust
12.8 million shares of Senior Housing


     --   Distributions: $1.28/share per annum
     --   131.9 million shares outstanding
     --   $781 million senior debt outstanding plus $205 million
          subordinated debt]


                        Senior Housing After the Spin-Off

[Graphic Omitted - Flow Chart

93 senior housing properties, $770 million cost

     --   Distributions: $2.40/share per annum
     --   26 million shares outstanding
     --   $200 million debt outstanding]

                                        7
<PAGE>
                                  RISK FACTORS

     Your ownership of Senior  Housing shares will involve risks,  including the
following:

     o    No Established  Share Price.  There is no established  share price for
          Senior Housing shares. The Senior Housing shares will be traded on the
          NYSE but we do not know the  price at which  they will  trade.  Senior
          Housing shares may trade for less than their fair value.

     o    Possible Tenant  Defaults.  Several of Senior  Housing's  tenants have
          recently reported significant losses,  particularly Mariner Post-Acute
          Network,  Inc.,  Integrated  Health Services,  Inc. and Genesis Health
          Ventures,  Inc.  Properties leased to Mariner,  Integrated and Genesis
          represent  11%,  29% and 2% of  Senior  Housing's  total  investments,
          respectively.  One of our tenants,  Frontier Group, Inc., which leases
          2% of Senior  Housing's  total  investments,  has  recently  filed for
          reorganization  under  Chapter  11 of the  Bankruptcy  Code.  If these
          tenants fail to pay rent, Senior Housing may be unable to pay its cash
          distributions to shareholders or to carry out its business plan.

     o    Properties Subject to Burdensome Regulations. Some of Senior Housing's
          properties  are  highly  regulated.  Approximately  57% of the  tenant
          revenues  at Senior  Housing's  properties  are paid by  Medicare  and
          Medicaid.  Changes in these  regulations or in the amounts of payments
          available  under  Medicare and Medicaid  programs may restrict  Senior
          Housing's tenants' ability to pay rent.

     o    Failure of Growth  Strategy.  Senior Housing's growth strategy depends
          upon its  ability  to raise  additional  capital  and to invest in new
          properties.  No  assurance  can  be  provided  that  capital  will  be
          available at reasonable  costs or that Senior  Housing will be able to
          purchase and lease additional properties.

     o    Conflicts of Interest.  Senior Housing's managing  trustees,  Barry M.
          Portnoy  and  Gerard  M.  Martin,  own its  investment  advisor,  Reit
          Management & Research,  Inc. Senior Housing pays Reit Management based
          in part on the amount of  investments.  Reit  Management  and  Messrs.
          Portnoy and Martin might have an incentive to cause Senior  Housing to
          acquire assets in order to raise advisory fees.

     o    Dominant Shareholder.  Upon completion of the spin-off,  HRPT will own
          49% of Senior Housing's outstanding shares. This ownership will enable
          HRPT to have a significant  influence over Senior Housing  shareholder
          decisions.

     o    Benefits  to HRPT.  The  completion  of the  spin-off  will  result in
          benefits to HRPT. For example, when HRPT's properties were transferred
          to Senior Housing,  Senior Housing agreed to pay $200 million to HRPT.
          After the spin-off Senior Housing will borrow $200 million to pay this
          debt.

     o    Ownership Limitations and Anti-Takeover  Provisions.  Other than HRPT,
          shareholders  are  prohibited  from  owning  more  than 9.8% of Senior
          Housing.  Senior  Housing's  declaration  of trust and bylaws  contain
          other  provisions  that inhibit a change of control.  Because of these
          limitations  Senior  Housing  shareholders  may be unable to realize a
          change of control premium for their shares.

     o    Liabilities of Real Estate Ownership.  Senior Housing's  business will
          be subject to risks associated with real estate  ownership,  including
          the need for regular  maintenance  and  repairs,  the need for capital
          expenditures and possible environmental hazards.

     o    Dependence  Upon  Marriott.  Forty-two  percent  of  Senior  Housing's
          investments are in properties leased to Marriott. An adverse change in
          Marriott's  financial  condition  or  its  operations  of  the  leased
          properties  would  adversely  affect Senior  Housing's  ability to pay
          distributions.

     o    Tax  Risks.  The  federal  tax  law  does  not  clearly  address  REIT
          spin-offs.  If the IRS  successfully  challenges  our reporting of the
          spin-off, you may have to pay more taxes.


                                        8
<PAGE>

                              HRPT GROWTH STRATEGY

     After the  spin-off,  we will be  principally  focused  upon  managing  and
growing  our  office  building  investments.  Most  of  our  investments  are in
multi-tenant   commercial  office  buildings.  We  sometimes  invest  in  office
buildings  leased to medical  providers and  government  agencies  because these
types of tenants  often are  willing to sign long term leases and have a history
of regular renewals.  We prefer to invest in central business  districts because
there are usually  barriers to new  development in those  locations.  We believe
this  strategy  adds  stability to our  portfolio  and  increases  the long term
appreciation potential of our properties.


                             HRPT Office Investments


                                Types of Tenants


                [Graphic Omitted  - Pie Chart


                Commercial Office
                 Tenants            $1,589 million      64%
                Medical and
                 Biotechnology
                 Tenants            $445 million        18%
                U.S. Government     $446 million        18%]




                                CBD vs. Suburban

                [Graphic Omitted  -  Pie Chart


                Central Business
                 Districts          $1,578 million      64%
                Suburban Areas      $902 million        36%]



     Our 175 office  buildings  are  located in 27 states  and the  District  of
Columbia. Five market areas contain about two-thirds of our office portfolio:


<TABLE>
<CAPTION>
                               HRPT Geographic Diversification

Market Area          No. of Buildings          Investment                    Square Feet
- -----------          ----------------          ----------                    -----------
                                                 (000s)
<S>                        <C>              <C>        <C>               <C>         <C>


Philadelphia, PA            17               $530,288   (21%)             3,541,006   (19%)
Austin, TX                  25                301,534   (12%)             2,653,088   (15%)
Washington, DC              16                409,322   (17%)             2,177,901   (12%)
Boston, MA                  30                191,946    (8%)             1,603,149    (9%)
Southern CA                 17                250,351   (10%)             1,126,171    (6%)
Other markets               70                796,106   (32%)             7,128,393   (39%)
                           ---             ----------  -----             ----------   ----
Total                      175             $2,479,547  (100%)            18,229,708  (100%)
                           ===             ==========  =====             ==========  =====


</TABLE>
                                              9
<PAGE>


     Two criteria have  historically  guided our management and  acquisitions of
office  buildings  and are likely to do so in the  future.  First,  we prefer to
lease to high credit quality tenants.  Approximately 52% of our office rents are
paid by tenants who are  investment  grade  rated,  including  19% from the U.S.
Government.  An  additional  10% of our office  rents come from  publicly  owned
companies  which  are not  investment  grade  rated;  and many of our  remaining
tenants are large law, accounting and other professional  service firms which we
believe have strong credit characteristics. Second, we generally prefer to lease
office  buildings for longer rather than shorter  terms.  Only 20% of our leases
expire in the next three years.  Almost half of our leases have remaining  terms
of seven or more years.




                        HRPT Office Tenant Credit Quality
                              (by percentage of rent)

                          [Graphic Omitted  - Pie Chart


                          Investment Grade         52%
                          Private Tenants          38%
                          Other Public Companies   10%]



                          HRPT Office Lease Expirations
                             (by percentage of rent)

                          [Graphic Omitted  - Pie Chart


                          Over 10 years       27%
                          7-9 years           22%
                          4-6 years           31%
                          3 years or less     20%]




     At this time we have no plans to undertake speculative development,  but we
are exploring some build-to-suit  opportunities on land which we own. Generally,
we have only acquired  development  sites as ancillary  property incident to our
purchases  of  developed  income  producing  properties.  We estimate  the total
development  potential of land which we own at approximately  2.9 million square
feet of office space.


                                       10
<PAGE>
                         SENIOR HOUSING GROWTH STRATEGY

     Senior  Housing's 93 properties  are leased to nine  tenants.  Ninety-seven
percent of Senior  Housing's  investments  are leased to  subsidiaries of public
companies  which have  guaranteed  the lease  obligations.  The leases for 91 of
these properties  extend to at least 2005.  Senior  Housing's  largest tenant is
Marriott International, Inc. The following chart shows Senior Housing properties
leased  to  tenants  by   historical   investment  at  cost  and  current  lease
expirations.

                           Senior Housing Investments

o     $770 million total assets              [Graphic Omitted - Pie Chart

o     42% leased to Marriott                 Marriott International        42%
                                               14 Properties
o     97% leased to public                     $326 million
     companies                                 Lease expires 2013

o     leases for 99% expire                  Brookdale Living Communities  13%
     in 2005 or after                          4 Properties
                                               $102 million
                                               Lease expires 2019

                                             Mariner Post-Acute Network    11%
                                               26 Properties
                                               $86 million
                                               Lease expires 2013

                                             Integrated Health Services     9%
                                              Lease No. 1
                                               31 Properties
                                               $66 million
                                               Lease expires 2010

                                             Integrated Health Services    20%
                                              Lease No. 2
                                               11 Properties
                                               $152 million
                                               Lease expires 2006

                                             Genesis Health Ventures        2%
                                               1 Property
                                               $13 million
                                               Lease expires 2005

                                             Other Operators                3%
                                               6 Properties
                                               $25 million
                                               Leases expire 2001-2005]


     The aging of the U.S.  population,  the increasing  percentage of women who
work away from home, the high divorce rate and societal mobility are demographic
facts which tend to increase demand for specialized  senior housing  properties.
Senior Housing hopes to profit from this increasing  demand by buying properties
specially  designed to meet the needs of aged residents.  Senior Housing expects
that its leases will  require  rents which  exceed its cost of capital and which
increase as the properties' gross revenues increase.

     A new Medicare rate setting  program that is now being  implemented has had
negative  impacts upon the financial  performance of several of Senior Housing's
tenants.  Senior  Housing  believes  that  these  tenants  will pay their  lease
obligations, or, if they do not do so, that Senior Housing may be able to re-let
most of these  properties to new tenants who will pay comparable  rents.  In the
future,  Senior Housing intends to focus new investments in properties which are
not dependent  upon  government  payment  programs.  At the same time,  however,
Senior  Housing  believes that the new,  lower  Medicare  rates have reduced the
prices of many nursing  homes to levels which may present  attractive  long term
investment opportunities.

                                  DISTRIBUTIONS


     After the spin-off,  HRPT's new  distribution  rate will be $1.28 per share
per year,  payable $0.32 per share per quarter.  Senior  Housing's  distribution
rate will be $2.40 per share per year, payable $0.60 per share per quarter. Cash
distributions  will be payable at these rates  effective  for the quarter  ended
September 30, 1999. We expect that, on an annualized basis, approximately 17% of
HRPT's  new  distributions  and  18%  of  Senior  Housing's  distributions  will
constitute returns of capital.


                          PRINCIPAL PLACES OF BUSINESS

     HRPT and Senior Housing  maintain their principal places of business at 400
Centre Street,  Newton, MA 02458. HRPT's phone number is (617) 332-3990.  Senior
Housing's phone number is (617) 796-8350.

                                       11
<PAGE>
              SUMMARY PRO FORMA CONSOLIDATED FINANCIAL INFORMATION

     The following table presents the pro forma impact of the spin-off on HRPT's
income  statement  and  balance  sheet and the pro forma  income  statement  and
balance  sheet of Senior  Housing as a  separate  company.  The  Senior  Housing
statements   include  pro  rata   allocations   of  interest   and  general  and
administrative  expenses for historical  periods.  In the opinion of management,
the methods of  allocation  are  reasonable.  It is  impossible  to estimate all
operating  costs that  Senior  Housing  would incur as a separate  company.  For
additional  information  about the  amounts  appearing  in this  table,  see the
Unaudited Pro Forma Consolidated Financial Statements and notes thereto on pages
F-2 through F-13.
<TABLE>
<CAPTION>

                                                         As of and for the six months ended 1999
                                                    (unaudited, amounts in 000s, except per sharedata)
                                               ----------------------------------------------------------
                                                                  HRPT                      Senior Housing
                                               ----------------------------------------     --------------
                                                                 Spin-Off
Income Statements                              Historical     Adjustments     Pro Forma        Pro Forma
                                               -----------    -----------    -----------      -----------
<S>                                           <C>            <C>            <C>             <C>
Rental income                                  $   203,335    $   (42,409)   $   160,926      $    42,409
Interest and other income                            7,619         (2,881)         4,738            2,881
                                               -----------    -----------    -----------      -----------
Total revenues                                     210,954        (45,290)       165,664           45,290
                                               -----------    -----------    -----------      -----------
Operating expense                                   50,548           --           50,548             --
Interest expense                                    39,525         (5,600)        33,925            7,281
Depreciation and amortization                       37,314        (11,207)        26,107           11,207
General and administrative                           9,849         (2,259)         7,590            2,259
                                               -----------    -----------    -----------      -----------
Total expenses                                     137,236        (19,066)       118,170           20,747
                                               -----------    -----------    -----------      -----------
Income before equity in earnings of
   Hospitality Properties and Senior Housing        73,718        (26,224)        47,494           24,543
Equity in earnings of Hospitality Properties         4,029           --            4,029             --
Equity in earnings of Senior Housing                  --           12,100         12,100             --
                                               -----------    -----------    -----------      -----------
Net income (1)                                 $    77,747    $   (14,124)   $    63,623      $    24,543
                                               ===========    ===========    ===========      ===========
Average basic shares outstanding                   131,778                       131,778           26,000
                                               ===========                   ===========      ===========
Average diluted shares outstanding                 143,159                       143,159           26,000
                                               ===========                   ===========      ===========
Per share data:
   Basic and diluted income (1)                $      0.59                   $      0.48      $      0.94
                                               ===========                   ===========      ===========
   Distributions                               $      0.76                   $      0.64      $      1.20
                                               ===========                   ===========      ===========

Balance Sheets
Real estate investments                        $ 3,006,521    $  (732,393)   $ 2,274,128      $   732,393
Accumulated depreciation                          (184,992)       105,823        (79,169)        (105,823)
                                               -----------    -----------    -----------      -----------
                                                 2,821,529       (626,570)     2,194,959          626,570
Real estate mortgages                               60,530        (37,638)        22,892           37,638
Investment in Hospitality Properties               108,242           --          108,242             --
Investment in Senior Housing                          --          220,548        220,548             --
Cash and equivalents                                26,984        (26,593)           391           16,593
Other assets                                        84,869         (9,918)        74,951            9,918
                                               -----------    -----------    -----------      -----------
                                               $ 3,102,154    $  (480,171)   $ 2,621,983      $   690,719
                                               ===========    ===========    ===========      ===========

Bank credit facility                                    $-             $-             $-      $   200,000
Senior notes payable                               957,513       (200,000)       757,513             --
Mortgage notes payable                              23,985           --           23,985             --
Convertible subordinated debentures                204,863           --          204,863             --
Other liabilities                                  103,093        (43,360)        59,733           43,360
Shareholders' equity                             1,812,700       (236,811)     1,575,889          447,359
                                               -----------    -----------    -----------      -----------
                                               $ 3,102,154    $  (480,171)   $ 2,621,983      $   690,719
                                               ===========    ===========    ===========      ===========

<FN>
(1)  Excludes an HRPT gain on sale of properties of $8.3  million,  or $0.06 per share,  and loss on
     equity  transaction  of  Hospitality  Properties of $711,000,  or $0.01 per share,  for the six
     months ended June 30, 1999.
</FN>

</TABLE>

                                                 12


<PAGE>

                                  RISK FACTORS


     Your  ownership of Senior Housing  shares will involve  various risks.  The
following is a listing of the material risks:

There is no established share price for Senior Housing shares and they may trade
for less than fair value.


     There  is no  established  share  price  for  Senior  Housing  shares.  The
distribution of Senior Housing shares is not being underwritten by an investment
bank or otherwise.  The Senior  Housing shares will be traded on the NYSE but we
do not know the  price at which  they  will  trade.  We do not know if an active
market for Senior  Housing  shares will  develop.  Accordingly,  Senior  Housing
shares' trading price may not reflect their fair value.


Some of Senior  Housing's  tenants have  experienced  problems  which may impair
their abilities to pay rent.

     Some of Senior Housing's tenants have recently reported significant losses.
Mariner  Post-Acute  Network,  Inc.  ,  which  leases  11% of  Senior  Housing's
investments  and pays 18% of Senior Housing pro forma rents,  reported a loss of
$405.7 million for the quarter ended June 30, 1999.  Integrated Health Services,
Inc. , which leases 29% of Senior  Housing's  investments and pays 30% of Senior
Housing pro forma rents,  reported a loss of $4.6 million for the quarter  ended
June 30,  1999.  Genesis  Health  Ventures,  Inc.  , which  leases  2% of Senior
Housing's  investments and pays 2% of Senior Housing's pro forma rents, reported
a loss of $1.0  million  for the  quarter  ended  June 30,  1999.  One of Senior
Housing's  smaller  tenants,  The Frontier Group, a privately held company which
leases 2% of Senior  Housing's  investments and pays 2% of Senior  Housing's pro
forma rents, filed on July 14, 1999 for  reorganization  under Chapter 11 of the
Bankruptcy Code. If these tenants fail to pay rent, Senior Housing may be unable
to pay its cash distributions to shareholders or to carry out its business plan.
Because  leases for multiple  properties to an  affiliated  group of tenants are
subject to cross  default at the  election of Senior  Housing,  a lease  default
affecting one property owned by Senior  Housing may result in multiple  defaults
for material amounts of rent.

Some of Senior Housing's properties are subject to burdensome regulations.

     Forty-five  percent of Senior Housing's total investments are in healthcare
facilities . Investing in healthcare  facilities involves the following material
risks:

o    Complex   Regulations.    Detailed    specifications   for   the   physical
     characteristics   of   healthcare   properties   are  mandated  by  various
     governmental  authorities.  Changes in these  regulations may require major
     capital  expenditures.  Because Senior Housing's healthcare  properties are
     triple net leased to tenants,  Senior Housing has only limited control over
     the  maintenance  of its  properties.  Senior  Housing  regularly  monitors
     compliance by its tenants with applicable healthcare regulations.  Although
     Senior Housing has in the past periodically  become aware that some tenants
     may not have been in full compliance with these regulations, Senior Housing
     is not aware of any pending regulatory action against any of its properties
     which is likely to prevent their  continued  operations.  Senior  Housing's
     triple net leases require its tenants to comply with applicable regulations
     affecting  its  properties.  Nevertheless,  if its tenants  fail to perform
     these  obligations,  Senior  Housing  may be  required to do so in order to
     maintain the value of its investments.


o    Dependence on Government Programs. Approximately 57% of the tenant revenues
     at Senior  Housing's  properties  are paid by Medicare  and  Medicaid.  The
     Medicare  program  recently  implemented a prospective  payment  system for
     skilled nursing facilities,  which replaces cost-based reimbursements.  The
     Medicare  prospective payment system is being gradually  implemented over a
     three-year  period  which  began on July 1,  1998,  and has  already  had a
     negative impact upon the income of many nursing homes.  Many state Medicaid
     programs have implemented similar prospective payment systems. The Balanced
     Budget  Act of  1997  restricted  the  right  of  operators  of  healthcare
     facilities to challenge  state Medicaid rates in federal

                                       13

<PAGE>

     courts.  Whenever Medicare or Medicaid rates are reduced,  Senior Housing's
     tenants' ability to pay rent could be jeopardized.

o    Special Purpose  Buildings.  Senior Housing's  properties were specifically
     designed  for senior  housing.  If these  properties  cannot be operated as
     senior housing  facilities,  finding  alternative uses for these properties
     may be difficult and costly.


Senior Housing's ability to grow will depend upon access to capital which is not
assured.

     As a REIT,  Senior  Housing is  required to  distribute  95% of its taxable
income  and cannot  fund  capital  needs with  income  from  operations.  Senior
Housing's growth strategy requires that it raise additional capital to invest in
new  properties.  Senior  Housing's  ability to raise capital in the future will
depend not only upon its  performance  but also upon capital  market  conditions
which are  beyond its  control.  Moreover,  there are  several  other  REITs and
finance  companies  that now  aggressively  compete to purchase and lease senior
housing  properties.  Accordingly,  Senior  Housing's  growth  strategy  may not
succeed.


Senior  Housing's   investment  advisor  may  have  an  incentive  to  recommend
investments to raise fees and there will be other conflicts of interest.


     Conflicts  of  interest  have  arisen and will  continue to arise in Senior
Housing's business, including the following:

o    Barry M. Portnoy and Gerard M. Martin,  who are Senior  Housing's  managing
     trustees, own Reit Management,  its investment advisor. Reit Management has
     approximately  180  employees  and has  experience  acquiring  and managing
     properties for two other publicly owned REITs. Senior Housing believes that
     the  depth of  management  talent  available  to it  through  its  advisory
     contract  with  Reit   Management   will  provide  Senior  Housing  with  a
     competitive  advantage  and that the fees  payable to Reit  Management  are
     commercially reasonable.  Nonetheless, Senior Housing did not negotiate its
     advisory  agreement  at  arms'  length.  The  advisory  fee  paid  to  Reit
     Management will be based in part upon the amount of new investments made by
     Senior  Housing.  This fee structure  might  encourage  Reit  Management to
     advocate  acquisitions when doing so is not in the best interests of Senior
     Housing.

o    In  addition  to serving as Senior  Housing's  managing  trustees,  Messrs.
     Portnoy  and  Martin  are  managing   trustees  of  HRPT  and   Hospitality
     Properties.  They also have  business  interests  separate from these other
     REITs.  Similarly,  Reit Management also acts as the investment  advisor to
     HRPT and  Hospitality  Properties and has other business  interests.  These
     various business activities will compete for management time.


HRPT may be able to control Senior Housing shareholder decisions.


     Upon  completion  of the  spin-off,  HRPT will own 49% of Senior  Housing's
outstanding  shares.  Accordingly,  HRPT will have a significant  influence over
Senior  Housing  shareholder  decisions.  This influence may result in decisions
that may not serve the best interests of Senior Housing's other shareholders.


The spin-off will result in benefits to HRPT which could adversely affect Senior
Housing.

     The completion of the spin-off will result in substantial benefits to HRPT,
including the following:


o    When HRPT  transferred  its  properties to Senior  Housing,  Senior Housing
     became  indebted  to HRPT for $200  million.  After  the  spin-off,  Senior
     Housing  will borrow $200  million  under its bank credit  facility and pay
     this  debt to HRPT.  HRPT will not be  liable  for any of Senior  Housing's
     debt.


o    Upon  completion  of the  spin-off,  Reit  Management  will  become  Senior
     Housing's  investment  advisor.  Assuming  the  spin-off  is  completed  on
     September 30, 1999, the pro forma advisory fee that Senior Housing will pay
     to Reit Management from the completion of the spin-off through December 31,
     1999,  the  initial

                                       14
<PAGE>

     term of the agreement,  will be approximately $1.0 million, or $3.9 million
     on an annualized  basis.  HRPT's  advisory fees to Reit  Management will be
     reduced by the same amount.


o    HRPT currently owns 26 million of Senior Housing's shares.  Upon completion
     of the spin-off,  HRPT will  distribute 13.2 million of these shares to its
     shareholders  and will retain  12.8  million  shares.  By  retaining  these
     shares, HRPT will be able to participate in Senior Housing's future success
     through distributions and any appreciation in Senior Housing's share price.

o    HRPT has agreed not to sell any of its Senior  Housing  shares for one year
     after the spin-off.  If HRPT decides to sell thereafter,  these sales could
     depress the market value of Senior Housing shares.

Ownership limitations and anti-takeover  provisions affecting Senior Housing may
prevent shareholders from receiving a takeover premium.


     Senior Housing's  declaration of trust prohibits any shareholder other than
HRPT,  Reit  Management and their  affiliates  from owning more than 9.8% of its
outstanding  common shares.  This provision of the declaration of trust may help
Senior  Housing  comply with REIT tax  requirements.  This  provision  will also
inhibit a change of  control of Senior  Housing.  Its  declaration  of trust and
bylaws  contain other  provisions  that may increase the difficulty of acquiring
control of Senior Housing by means of a tender offer, open market  purchases,  a
proxy fight or otherwise, if the acquisition is not approved by Senior Housing's
board of trustees. These other anti-takeover provisions include the following:

     o    a staggered board of trustees with three separate classes;

     o    the  two-thirds  majority  shareholder  vote  required  for removal of
          trustees;

     o    the  availability of additional  shares that the board of trustees may
          authorize and issue on terms that it determines;

     o    advance notice  procedures with respect to nominations of trustees and
          shareholder proposals; and

     o    the  facts  that  only the  board  of  trustees  may call  shareholder
          meetings  and that  shareholders  are not  entitled  to act  without a
          meeting.

For all of these reasons, Senior Housing's shareholders may be unable to realize
a change of control premium for their shares.


Real estate ownership creates risks and liabilities.

     Senior Housing's  business will be subject to the following  material risks
associated with real estate acquisitions and ownership:

     o    casualty losses, some of which may be uninsured;

     o    lease  expirations  which are not renewed or for properties  which can
          only be relet at lower rents;

     o    costs relating to maintenance and repair, and the need to make capital
          expenditures due to changes in governmental regulations, including the
          Americans with Disabilities Act; and

     o    environmental  hazards created by tenants or abutters for which Senior
          Housing may be liable.

                                       15
<PAGE>

Changes at Marriott could adversely affect Senior Housing.

     Forty-two percent of Senior Housing's  investments are in properties leased
to Marriott.  Today we regard  Marriott as a strong credit tenant and its leased
properties are performing  well.  Nonetheless,  the Marriott leases extend for a
long period through 2013.  Marriott's financial condition and the performance of
its leased properties may change. Because the investment in properties leased to
Marriott   represents  such  a  large   percentage  of  Senior  Housing's  total
investments,  any  adverse  change  in  Marriott's  financial  condition  or its
operations of the leased  properties  would  adversely  affect Senior  Housing's
ability to pay distributions to shareholders.

The federal income tax treatment of the spin-off is uncertain.

     The Internal Revenue Code does not provide  definitive  guidance on valuing
Senior Housing shares and on taxing REIT spin-offs.  We will perform all our tax
reporting,  including statements sent to the IRS and to you, on the basis of our
valuation assumptions and our counsel's opinion on how the spin-off is likely to
be taxed. If the IRS successfully  challenges our positions on these issues,  we
may be  required  to amend our  reporting  and you may have to pay more  federal
income taxes.




                                       16

<PAGE>

                                  THE SPIN-OFF

Key Dates

Dates                      Activity


September __, 1999         Prospectus Mailing Date. The date the registration
                           statement  of which this  prospectus  is a part is
                           declared  effective  by the SEC. We will mail this
                           prospectus to you on or about this date.

September __, 1999         Record Date.  HRPT  shareholders of record on this
                           date will  receive  one Senior  Housing  share for
                           every 10 HRPT shares owned. We expect that a "when
                           issued"  market  on the  NYSE for  Senior  Housing
                           shares  may begin two  business  days  before  the
                           record date.  If a "when issued"  market  develops
                           for Senior Housing shares,  HRPT shares will begin
                           to trade "when issued/ex distribution."

September __, 1999         Distribution  Date.  We  expect  to  deliver  13.2
                           million   shares   of   Senior   Housing   to  the
                           distribution  agent on this date, and the spin-off
                           will be  completed.  If you hold HRPT  shares in a
                           brokerage account, your Senior Housing shares will
                           be  credited  to your  account.  If you hold  HRPT
                           shares  in   certificated   form,  a   certificate
                           representing  your Senior  Housing  shares will be
                           mailed to you; the mailing  process is expected to
                           take about 30 days.  If a "when  issued" and "when
                           issued/ex  distribution"  market has developed for
                           Senior Housing and HRPT shares,  respectively,  it
                           will  cease on this  date;  and  thereafter  those
                           shares will trade in the regular way.



Distribution Agent

     The  distribution  agent for the  spin-off  is State  Street Bank and Trust
Company, c/o Boston EquiServe, P.O. Box 8200, Boston,  Massachusetts 02266-8200;
telephone (800) 426-5523.

Listing and Trading of Senior Housing Shares


     Senior Housing shares have been approved for listing on the NYSE. We expect
that trading on a "when  issued" basis may commence on or about  September  ___,
1999. A "when-issued"  market will permit you and others to trade Senior Housing
shares on the NYSE before the shares are distributed.


     There is not currently a public market for Senior Housing shares. Prices at
which the Senior Housing shares may trade cannot be predicted.  Until and unless
an orderly  market  for  Senior  Housing  shares  develops,  the prices at which
trading in the shares  occurs may fluctuate  significantly.  The prices at which
Senior Housing shares trade may be influenced by many factors,  including, among
others,  the  depth  and  liquidity  of  the  market  which  develops,  investor
perception of Senior  Housing's  business and growth  prospects,  the market for
REIT shares generally,  Senior Housing's  distribution policy and general market
conditions.

Background and Reasons for the Spin-Off


     HRPT was founded in 1986 to invest in senior  housing real estate.  For the
past few years,  however, most of our investments have been in commercial office
buildings.  In 1998 we  concluded  that a renewed  emphasis  on  senior  housing
properties  was  appropriate.   We  believe  there  are  attractive   investment
opportunities  now  available in both  commercial  office  buildings  and senior
housing.  Also in 1998, based upon  conversations with our shareholders and with
potential  investors,  we became  convinced that many REIT  investors  prefer to
invest in  companies  that are  focused  upon one type of  property  rather than
diversified companies.


                                       17
<PAGE>

     In December  1998, we  determined  to divide HRPT into two separate  public
companies,  one  focused  upon  office  buildings  and one  focused  upon senior
housing.  Our original plan was to distribute one share of Senior Housing to our
shareholders for every 10 shares of HRPT owned and to simultaneously complete an
initial public  offering of an additional 11 million  shares of Senior  Housing.
Recently,  we  abandoned  our plans for an  initial  public  offering  of Senior
Housing shares. Nonetheless, we continue to believe that two separate companies,
one  focused  upon  office   buildings  and  one  focused  upon  senior  housing
properties,  may be able to take better  advantage  of their  respective  growth
opportunities.  For this reason, in July 1999 we determined to proceed with this
spin-off.  Because we are not selling any shares of Senior Housing at this time,
HRPT will retain a larger  percentage  ownership  of Senior  Housing than it had
planned  to retain in  December  1998.  Our board of  trustees  has  unanimously
approved the spin-off as being in the best interests of our shareholders.

Manner of Effecting the Spin-Off

     In order to effect  the  spin-off,  we and  Senior  Housing  have taken and
expect to take various actions, including the following:

     o   In December 1998 we organized  Senior  Housing as a Maryland REIT which
         is 100% owned by HRPT. At the time it was organized, Senior Housing had
         26.4 million shares  outstanding.  Since that time some of these shares
         have been cancelled and there are now 26 million shares outstanding.

     o   In June  and  July  1999 we  transferred  title  to 93  senior  housing
         investments to other 100% owned REIT subsidiaries of HRPT. These senior
         housing  subsidiaries  were  newly  created  and all their  assets  and
         liabilities relate to these 93 investments.

     o   In July 1999 Senior Housing accepted a commitment for a new bank credit
         facility for up to $350 million.  This line of credit will be effective
         upon completion of the spin-off.


     o   On September 1, 1999,  HRPT  transferred  100% of the  ownership of its
         senior housing  subsidiaries to Senior  Housing.  In  consideration  of
         these transfers,  Senior Housing and one of its subsidiaries  agreed to
         pay $200 million to HRPT.  On the date the  spin-off is completed  13.2
         million   shares  of  Senior   Housing  will  be  distributed  to  HRPT
         shareholders.


     o   Shortly after  completion of the spin-off,  Senior  Housing will borrow
         $200 million under its bank credit  facility and pay its formation debt
         to HRPT. HRPT intends to use this $200 million to prepay senior debt.

The Transaction Agreement


     In order to evidence  the actions  necessary  to effect the spin-off and to
govern their  relations  after the spin-off,  HRPT and Senior Housing  entered a
transaction  agreement . The form of this  transaction  agreement has been filed
with  the  SEC as an  exhibit  to  the  registration  statement  of  which  this
prospectus is a part. If you want more information  about the actions which have
been and will be taken to effect the  spin-off or about the  agreements  between
HRPT and Senior Housing  concerning their future relations,  you should read the
entire transaction  agreement.  The provisions of the transaction  agreement are
summarized as follows:

     o   Interest on the $200 million formation debt from Senior Housing and its
         subsidiary  to HRPT is  charged  at the same  rate as  HRPT's  weighted
         average cost of debt. On September 1, 1999, this interest rate was 7.1%
         per annum.

     o   The  formation  debt will be due and payable by Senior  Housing to HRPT
         within 10 days after the spin-off.  If the formation debt is not timely
         paid Senior Housing will be required to secure this debt.

                                       18
<PAGE>

     o   On the spin-off date, HRPT will make an additional capital contribution
         to Senior  Housing,  in cash, of $1 million,  plus  $169,500  times the
         number of days from and  including  July 1, 1999,  to and excluding the
         spin-off date.

     o   HRPT will  indemnify  Senior  Housing  with  respect  to any  liability
         relating to any property  transferred  to Senior  Housing  which arises
         from litigation pending at the time of the spin-off.

     o   Senior Housing will  indemnify HRPT from any liability  relating to any
         property  transferred  by HRPT to Senior Housing which arises after the
         spin-off.

     o   HRPT and Senior  Housing  have  agreed not to compete  with each other.
         Specifically,  so long as: (a) HRPT remains a more than 10% shareholder
         of  Senior  Housing;  (b)  HRPT  and  Senior  Housing  engage  the same
         investment  advisor;  or (c) HRPT and Senior  Housing  have one or more
         common managing trustees; then


         -- HRPT will not invest in properties  involving senior housing without
         the prior consent of Senior Housing's independent trustees;


         --  Senior  Housing  will not  invest in  office  buildings,  including
         medical office buildings or clinical laboratory buildings,  without the
         prior approval of HRPT's independent trustees; and

         -- If a particular  investment  involves both senior housing and office
         components  the  character  of the  investment  will be  determined  by
         building area, excluding common areas, unless the boards of trustees of
         both Senior Housing and HRPT otherwise agree at that time.  Also, these
         non-competition  provisions will not apply to any  investments  held by
         HRPT at the time of the spin-off.

     o   HRPT and  Senior  Housing  will  cooperate  to  enforce  the  ownership
         limitations  in  their  respective  declarations  of  trust  as  may be
         appropriate to continue their tax status as REITs and otherwise.

     o   HRPT and Senior  Housing  will  cooperate  to file  future tax  returns
         including appropriate allocations of taxable income, expenses and other
         tax attributes.

     o   HRPT will not sell any of its  retained  12.8  million  Senior  Housing
         shares for a period of at least one year following the spin-off without
         the consent of Senior Housing's independent trustees.

     o   HRPT  will pay all  expenses  of the  spin-off  including  the costs of
         distributing  Senior  Housing  shares  to its  shareholders,  legal and
         accounting charges, SEC filing fees, NYSE listing fees and the up-front
         costs of establishing Senior Housing's bank credit facility.

                                       19
<PAGE>

           INFORMATION ABOUT HRPT PROPERTIES TRUST AFTER THE SPIN-OFF


     HRPT is a REIT that acquires,  owns and leases office buildings.  After the
spin-off we will own 175 office  buildings  which had an  original  cost of $2.5
billion. Of these, 89 are commercial office buildings which had an original cost
of almost $1.6 billion, 28 are buildings leased to the U.S. Government which had
an original  cost of $446  million and 58 are medical  office and  biotechnology
buildings which had an original cost of $445 million. We will also own 4 million
shares of Hospitality Properties and 12.8 million shares of Senior Housing.


HRPT Investments


     Commercial Office  Buildings.  Almost $1.6 billion of our total investments
in office buildings are in multi-tenant  commercial  buildings.  We believe that
current  business trends have created  favorable  investment  opportunities  for
commercial office properties:  some institutional investors have begun disposing
of their direct ownership of properties and investing in more liquid real estate
securities;  purchasers  of  distressed  properties  in the early  1990s are now
divesting  their improved  assets;  and many  businesses are selling their owned
real estate to invest proceeds in core activities.  Moreover,  unlike many REITs
that buy commercial office buildings,  our focus is to acquire stabilized office
buildings  with long term leases to strong credit  tenants rather than buildings
that  might  afford  turnaround  potential  because of  vacancies  or short term
leases.


     Government Office Buildings. Over $400 million of our investments in office
buildings are in buildings  majority  leased to the U.S.  Government.  Most U.S.
Government  office  space  requirements  are  managed  by the  General  Services
Administration, the GSA. Most large GSA leases are for initial terms of 10 to 20
years plus  renewal  options for an  additional  5 to 20 years.  Many GSA leases
permit the  Government  to  terminate by notice given any time after a so-called
"firm term." The weighted average remaining firm term for our Government tenants
is  approximately  six years.  From 1980 to September  1996, the amount of space
leased by the GSA increased  from 139 million  square feet to 146 million square
feet.  We believe  that the GSA's  demand for leased  space will  continue to be
strong as a result of federal budget pressure to limit capital  expenditures and
the need to use funds available for capital  expenditures to modernize GSA-owned
buildings,  over  half  of  which  exceed  50  years  of  age.  Based  upon  the
Government's investments in tenant improvements to our properties, the high cost
of relocation  and the stability of the missions and space  requirements  of the
Government agencies that occupy our properties,  we believe that there is a high
probability  of GSA lease  renewals for our  properties  through  their  renewal
options,  and in many  cases  beyond  those  periods.  Moreover,  because of the
locations of many of these Government leased buildings and the high standards to
which they have been built,  we may be able to lease most of these  buildings to
commercial  users at  comparable  or higher  rents in the  event the  Government
terminates or fails to renew any of these leases.

     Medical and Biotechnology  Buildings.  Over $400 million of our investments
in office buildings are leased to medical  providers and to companies engaged in
biotech research and development. The largest of our multi-tenant medical office
buildings is the Cedars Sinai Medical Towers in Los Angeles,  California,  which
includes  330,715 square feet leased to 115 separate  medical  practice  groups.
This  property  includes  two  garages  with  parking for over 1,600 cars and is
attached by a footbridge  to Cedars  Sinai  Medical  Center,  one of the largest
hospitals in the western United States.  It is our experience  that most medical
tenants  regularly  renew  leases  at  locations  which are  convenient  for the
physicians and their  patients.  For example,  the Cedars Sinai Medical  Towers'
current  occupancy is almost 100% and, during the early 1990s when many Southern
California office properties suffered occupancy declines,  the occupancy at this
property  was never below 91%.  Similarly,  we  currently  own  several  biotech
properties in the areas of San Diego, California and Boston, Massachusetts.  The
tenants  at these  buildings  have often  invested  large  amounts in  leasehold
improvements  which  would  make  their  relocation   difficult  and  expensive.
Accordingly,  it is our  expectation  that these  tenants will  regularly  renew
expiring leases.


     Equity  Investment in Hospitality  Properties  Trust. We have invested $100
million in 4 million common shares of Hospitality  Properties,  which constitute
7.1% of the total Hospitality Properties common shares outstanding.  Hospitality
Properties  is a REIT in the business of owning hotels and leasing them to hotel
operating companies.  We organized Hospitality Properties in February 1995 as an
outgrowth  of our

                                       20
<PAGE>

relationship with Host Marriott  Corporation and Marriott  International,  Inc.,
which arose from our previous  investment  in retirement  communities  leased to
Marriott   International.   Since  August  1995,   Hospitality   Properties  has
successfully  completed  several public  offerings of shares and on September 1,
1999, had a total market capitalization of $1.9 billion.  Hospitality Properties
currently owns or has  commitments to purchase 210 hotels,  which are located in
35 states and contain 28,451 rooms. We receive  distributions on our Hospitality
Properties  shares at the current annual rate of $2.76 per share.  Our financial
reports include our share of Hospitality Properties' operating results using the
equity method of  accounting.  Hospitality  Properties  shares are listed on the
NYSE,  and on September  1, 1999 the last  reported  sale price for  Hospitality
Properties common shares was $25.50 per share.


     Equity Investment in Senior Housing  Properties  Trust.  After the spin-off
HRPT will retain 12.8 million shares of Senior  Housing,  which will  constitute
49% of the total Senior Housing shares  outstanding.  Senior Housing is expected
to pay  distributions  at an  initial  annual  rate of $2.40 per  share.  HRPT's
financial reports will include Senior Housing operating results using the equity
method of accounting.  HRPT does not intend to invest additional money in Senior
Housing,  and as Senior  Housing  grows its  investments  and issues  additional
shares to raise  capital we expect that HRPT's  ownership  percentage  of Senior
Housing  will  decline.  We have  agreed not to sell these  shares,  without the
consent  of  Senior  Housing's  independent  trustees,  for a period of one year
following  the  spin-off   transaction.   Thereafter,   depending   upon  market
conditions,  HRPT may sell these shares to raise capital to invest in additional
office buildings.


     Pending Acquisitions.  As of September 1, 1999 we had entered into purchase
agreements to acquire 13 additional  office  properties  for $81.4  million.  We
expect to buy these  properties  during the  remainder  of 1999,  subject to the
satisfactory  completion of our diligence.  In the normal course of our business
we regularly  evaluate  opportunities to acquire  properties.  We currently have
several investment opportunities under consideration.  We may acquire additional
office buildings involving material amounts in the future.

     Development Activities. HRPT regularly has several million dollars worth of
construction  activity  underway.  Most of this work is tenant fit out, repairs,
maintenance and redevelopment types of construction activities.  We believe that
we have the capacity to develop commercial office buildings, but to date we have
not done any speculative development.  We currently own a large tract of land in
Austin,   Texas  and  another   tract  of  land  in  the  area  of   Pittsburgh,
Pennsylvania's   new  airport  which  are   appropriate   for  office   building
development.  Also,  several  of the  office  buildings  we own have  sufficient
adjacent  land for new office  development.  The two large  sites and all of the
development sites we own are ancillary investments to existing,  fully developed
office  buildings.   We  are  currently   exploring  the  possibility  of  doing
build-to-suit  developments  on some of our  developable  land. We estimate that
land we own can support  development of approximately 2.9 million square feet of
new office space.



                                       21

<PAGE>

Location of HRPT Office Buildings


     We own 175  office  buildings  located  in 27 states  and the  District  of
Columbia.

[Graphic  Omitted  - Map of  United  States  showing  location  of  HRPT  office
buildings by state]

<TABLE>
<CAPTION>

                                No. of                                                    No. of
          State               Buildings          Investment           State              Buildings           Investment
          -----               ---------          ----------           -----              ---------           ----------
                                                   (000s)                                                      (000s)
<S>                               <C>             <C>           <C>                           <C>            <C>
Alaska                              1               $1,000        New Hampshire                  1             $22,147
Arizona                             6               51,475        New Jersey                     4              29,947
California                         18              254,278        New Mexico                     6              30,298
Colorado                            2               20,931        New York                       9             266,270
Connecticut                         2               14,326        Ohio                           1              15,275
Delaware                            2               58,931        Oklahoma                       6              46,262
District of Columbia                5              207,855        Pennsylvania                  23             582,548
Florida                             4               11,618        Rhode Island                   1               8,010
Georgia                             1                2,984        Tennessee                      1              22,325
Kansas                              1                5,949        Texas                         28             326,315
Maryland                            8              164,013        Virginia                       4              54,107
Massachusetts                      29              169,799        Washington                     2              21,388
Minnesota                           7               68,504        West Virginia                  1               4,898
Missouri                            1                7,776        Wyoming                        1              10,318
                                                                                         -----------      --------------
                                                                  Total                        175          $2,479,547
                                                                                         ===========      ==============

</TABLE>

                                                          22

<PAGE>


     We intentionally  diversify our office investments  geographically.  At the
same time,  we attempt to acquire  multiple  properties  in selected  markets to
promote economic efficiencies. We define a market area to include the geographic
area which we believe can be efficiently managed from one central location.  The
market areas of the United States which  constitute  five percent or more of our
total office investments are as follows:



<TABLE>
<CAPTION>

Market Area          No. of Buildings          Investment                    Square Feet
- -----------          ----------------          ----------                    -----------
                                                 (000s)
<S>                        <C>              <C>        <C>               <C>         <C>

Philadelphia, PA            17               $530,288   (21%)             3,541,006   (19%)
Austin, TX                  25                301,534   (12%)             2,653,088   (15%)
Washington, DC              16                409,322   (17%)             2,177,901   (12%)
Boston, MA                  30                191,946    (8%)             1,603,149    (9%)
Southern CA                 17                250,351   (10%)             1,126,171    (6%)

</TABLE>

HRPT Tenants


     HRPT prefers to lease its properties to strong credit tenants.  Our largest
tenant is the U.S. Government.  Fifty- two percent of our office rent is derived
from companies whose senior unsecured  obligations are rated  investment  grade.
Ten percent of our office rent comes from other  public  companies  that are not
rated  investment  grade but for whom credit  evaluation  information is readily
available.  Approximately  27% of our  private  company  tenants  are large law,
accounting  and  professional  service firms which we believe have strong credit
characteristics but which are not investment grade rated.



                                                               Percentage of
Tenant                                                        Office Rent (1)
- ------                                                        ---------------

U.S. Government........................................            18.5%

Other investment grade tenants.........................             33.9

Other publicly owned tenants...........................             10.0

Subtotal investment grade and
    publicly owned tenants.............................             62.4

Other tenants..........................................             37.6
                                                                 -------

Total..................................................            100.0%
                                                                 =======





     (1) Percentage  of  office  rent is based on  leases  in effect on July 31,
         1999.  About 71% of our office  rent is gross  rent;  10% of our office
         rent is net rent; most of our Government  leases require modified gross
         rent.  Accordingly,  the data  shown in this  table is not  necessarily
         indicative of contributions to our net operating income.

                                       23
<PAGE>



Other  than the U.S.  Government,  no  tenant  accounts  for more than 5% of our
office  rents.  The  following  is a list  of all  our  other  tenants  who  are
responsible for 1% or more of our rents:

                                                              Percentage of
                    Tenant                                      Office Rent
                    ------                                    --------------
                SmithKline Beecham plc                              4.0%
                Health Insurance Plan of New York                   2.8%
                Solectron Corporation                               2.7%
                FMC Corporation                                     2.4%
                PNC Bank Corp.                                      2.2%
                Mellon Bank Corporation                             2.0%
                Motorola, Inc.                                      1.9%
                Ballard Spahr Andrews &
                  Ingersoll, LLP                                    1.6%
                Chase Corporation                                   1.6%
                Fallon Health Clinics, Inc.                         1.4%
                Raytheon Company                                    1.4%
                Cedars Sinai Medical Center                         1.3%
                Marsh & McLennan Companies, Inc.                    1.3%
                The Limited, Inc.                                   1.2%
                Capital Cities Media, Inc.                          1.1%



                                       24
<PAGE>
HRPT Lease Expirations


     HRPT generally  prefers to enter into longer term leases with periodic rent
adjustments  rather than short term or fixed rate leases.  The  following  table
sets  forth  the  percentage  of  our  office  rent  and  occupied  square  feet
represented by leases that expire in the years indicated.

<TABLE>
<CAPTION>

                                                                                                 Percentage
                             Office Rent(1)        Percentage of            Occupied             of Occupied
   Year                          (000s)             Office Rent          Square Feet(2)          Square Feet
   ----                           ----              -----------          -----------             -----------
<S>                          <C>                    <C>                   <C>                     <C>

1999                            $7,194                 2.0%                  249,433                 1.4%
2000                            24,095                 6.6%                1,008,413                 5.7%
2001                            43,906                12.0%                1,787,704                10.1%
2002                            28,980                 7.9%                1,225,962                 6.9%
2003                            44,470                12.2%                1,819,422                10.2%
2004                            40,046                10.9%                1,831,473                10.3%
2005                            30,551                 8.4%                1,565,720                 8.8%
2006                            25,732                 7.0%                1,247,197                 7.0%
2007                            22,923                 6.3%                1,428,692                 8.0%
2008                             7,392                 2.0%                  306,789                 1.7%
2009 and thereafter             90,415                 24.7%               5,320,862                29.9%
                              --------                -----               ----------               -----
Totals                        $365,704                100.0%              17,791,667               100.0%
                              ========                =====               ==========               =====

<FN>

(1)  Office rent represents  rents due under leases that existed as of July 31, 1999. Total rent for
     office  properties for the year ended December 31, 1998, was  $245,955,000,  and total rent for
     office  properties  for the six months ended June 30, 1999 was  $158,889,000.  About 71% of our
     office rent is gross rent; 10% of our office rent is net rent;  most of our  Government  leases
     require  modified  gross  rent.  Accordingly,  the rent shown in this table is not  necessarily
     indicative of contributions to our net operating income.
(2)  Represents  square feet occupied as of July 31, 1999. This 17.8 million square feet of occupied
     space accounts for 98% of our total office space available for rent.

</FN>

</TABLE>
                                                 25
<PAGE>

HRPT Management

     After the spin-off,  the trustees and executive officers of HRPT will be as
follows:
<TABLE>
<CAPTION>

Name                                    Age      Position
- ----                                    ---      --------
<S>                                    <C>     <C>


Barry M. Portnoy...................      54      Managing Trustee (term will expire in 2002)

Gerard M. Martin...................      64      Managing Trustee (term will expire in 2000)
Rev. Justinian Manning, C.P........      73      Independent Trustee (term will expire in 2000)
Patrick F. Donelan.................      57      Independent Trustee (term will expire in 2001)
Vacancy............................              Independent Trustee (term will expire in 2002)
John A. Mannix.....................      43      President and Chief Operating Officer
John Popeo.........................      39      Treasurer, Chief Financial Officer and Secretary
David M. Lepore....................      38      Senior Vice President
</TABLE>


     Barry M. Portnoy has been a managing  trustee of both HRPT and  Hospitality
Properties since their organization in 1986 and 1995, respectively.  Mr. Portnoy
is also a  Director  and 50%  owner of Reit  Management.  Mr.  Portnoy  has been
actively  involved  in real  estate and real  estate  finance  activities  as an
attorney,  investor and manager for over 20 years.  Mr. Portnoy was a partner in
the law firm of  Sullivan  &  Worcester  LLP,  Boston,  Massachusetts  from 1978
through March 31, 1997, and he served as Chairman of that firm from 1994 through
March 1997.

     Gerard M. Martin has been a managing  trustee of both HRPT and  Hospitality
Properties since their organization in 1986 and 1995,  respectively.  Mr. Martin
is also a Director and 50% owner of Reit Management.  Mr. Martin has been active
in the real  estate and senior  housing  industries  as a  developer,  owner and
manager for  approximately  30 years.  During the past five years,  Mr. Martin's
principal  employment  has been as a managing  trustee  of HRPT and  Hospitality
Properties.

     The Reverend  Justinian  Manning,  C.P. has been, since September 1990, the
pastor of St.  Gabriel's  parish in Brighton,  Massachusetts.  He is also on the
Board of Directors of Charlesview, a low and moderate income housing program. He
is past Treasurer and a former  Director of St. Paul's  Benevolent,  Educational
and Missionary Institute,  a New Jersey corporation,  which oversees foundations
in various states and the Institute's Overseas Missions.  He was formerly on the
Board of Directors of St. Paul's Monastery Manor in Pittsburgh,  Pennsylvania, a
congregate  housing  facility.  He  belonged  to the  Provincial  Council of the
Passionist  Provincialate  and is the former Director of  Consolidation  for the
Community.

     Patrick F.  Donelan has been since 1998 a Director  of  Dresdner  Kleinwort
Benson,  and since 1996 an Executive Vice President of Dresdner Kleinwort Benson
North America LLC, a New York based bank, which is a subsidiary of Dresdner Bank
AG of Germany.  Prior to 1996 Mr. Donelan was Chairman of Kleinwort Benson North
America,  Inc., a  subsidiary  of  Kleinwort  Benson Ltd. of England,  which was
acquired by Dresdner Bank AG in 1995.

     Vacancy.  Currently our third  independent  trustee is Dr. Bruce Gans. Upon
completion  of this  spin-off  Dr.  Gans will resign from HRPT and be elected an
independent  trustee of Senior Housing.  We intend to elect a third  independent
trustee after Dr. Gans resigns, but we have not yet selected anyone to fill this
position.

     John A. Mannix will become our President and Chief  Operating  Officer upon
completion  of the  spin-off.  Mr.  Mannix  has  served  as our  Executive  Vice
President since May 1998. Mr. Mannix has been a Vice President of our investment
advisor, Reit Management,  and its affiliates since 1989. Mr. Mannix is a member
of the Urban Land Institute.

     John Popeo will become our Treasurer, Chief Financial Officer and Secretary
upon  completion  of the spin- off. Mr. Popeo has been the  Treasurer  and Chief
Financial  Officer of Reit Management since 1997. Prior to 1997, he was employed
by The  Beacon  Companies  from  1988  through  1992 and as Vice  President  and
Controller  from 1996  through  1997.  From 1992 through 1996 he was employed by
First Winthrop Corp. as

                                       26
<PAGE>

Vice President and Controller.  Mr. Popeo has held various positions in the real
estate  industry from 1985 through  1988,  prior to which he was employed by the
public accounting firm of Laventhol and Horwath. Mr. Popeo is a certified public
accountant.

     David M. Lepore is our Senior Vice President. Mr. Lepore is responsible for
building operations,  leasing and acquisition diligence for our properties.  Mr.
Lepore has been employed in various capacities by our investment  advisor,  Reit
Management,  since 1992. Prior to 1992 he was employed by The Beacon  Companies.
Mr.  Lepore is a member of Building  Owners and  Managers  Association  and is a
certified Real Property Administrator.

Additional Information About HRPT

     If you would  like more  information  about HRPT than is  included  in this
prospectus, you should study the public information which we have filed with the
SEC.

                                       27

<PAGE>
                INFORMATION ABOUT SENIOR HOUSING PROPERTIES TRUST

General

     Senior Housing is a REIT organized  under Maryland law to acquire,  own and
lease senior apartments,  congregate communities, assisted living properties and
nursing homes. Senior Housing owns 93 properties which have 13,571 units and are
leased to nine different tenants.

Growth Strategy

     The population of the United States is aging.  Senior Housing believes that
this demographic  fact will increase the demand for existing senior  apartments,
congregate  communities,  assisted  living  properties  and  nursing  homes  and
encourage development of new properties. Senior Housing's basic business plan is
to profit from the increasing demand in two ways. First,  Senior Housing intends
to  purchase  additional  properties  and lease them at  initial  rents that are
greater than its costs of acquisition capital. Second, Senior Housing intends to
structure  leases that provide for periodic rental  increases based in part upon
gross operating revenue increases at its properties.


     A primary  purpose of the spin-off is to form a new REIT with a strong core
of senior housing real estate and a management  team dedicated to take advantage
of present market conditions. To facilitate these efforts two senior officers of
Senior  Housing's  investment  advisor  will devote  approximately  75% of their
business  time to  growing  Senior  Housing's  business.  David  J.  Hegarty  is
currently the President and Chief Operating  Officer of both Reit Management and
HRPT and a Director of Reit Management. Ajay Saini is currently a Vice President
of Reit  Management  and Treasurer  and Chief  Financial  Officer of HRPT.  Upon
completion  of the  spin-off,  Messrs.  Hegarty  and  Saini  will  resign  their
positions at HRPT and assume similar  positions at Senior  Housing.  Mr. Hegarty
will  remain an officer  and a Director of Reit  Management  and Mr.  Saini will
remain  an  officer  of Reit  Management.  Other  personnel  of Reit  Management
including Senior Housing's managing trustees,  Messrs.  Portnoy and Martin, will
also  devote a  significant  part of their  time to assist  in Senior  Housing's
growth efforts.


     Senior  Housing  believes that current  market  conditions  make a focus on
senior housing investments appropriate at this time for the following reasons:

     o   A large number of new properties  developed by start up assisted living
         companies  during  the past few years have been  completed  and are now
         available for investment with limited start up risks.

     o   The  current  shortage  of debt and  equity  capital  for  real  estate
         investments  associated  with  healthcare  has  reduced  the  financing
         options available to all senior housing property owners and limited the
         amount of new development activities being undertaken.

     o   The  combination  of the  foregoing  circumstances  has made  prices of
         senior housing  properties,  especially  nursing homes, more attractive
         than they have been during the past three years.


     Senior  Housing  will use bank loans  initially  to fund its  acquisitions.
Periodically,  Senior  Housing  will repay the bank loans with long term debt or
equity  issuances.  For more  information  about  Senior  Housing's  bank credit
facility, see "Senior Housing Policies--Financing  Policies" on page] 63 of this
prospectus.


History and Management


     Senior Housing is currently a 100% owned  subsidiary of HRPT.  There are 26
million shares of Senior Housing outstanding.  As part of the spin-off HRPT will
distribute  13.2 million  Senior Housing  shares to HRPT's  shareholders  on the
basis of one Senior  Housing  share for every 10 HRPT shares owned on the record
date of  September  ___,  1999.  After the  spin-off  Senior  Housing  will be a
separate public company, 51%

                                       28
<PAGE>


owned by the public  and 49% owned by HRPT,  and Senior  Housing's  shares  will
trade on the NYSE. For more  information  about the formation of Senior Housing,
see "The Spin-Off" on page 17 of this prospectus.


     Senior  Housing's  operations will be conducted by its investment  advisor.
The investment  advisor has approximately  180 full time employees,  including a
headquarters management staff, four regional offices and other personnel located
throughout  the United  States.  Based upon 13 years of  investing  and managing
senior housing real estate through HRPT and four years of operating  Hospitality
Properties, Reit Management and its principals have experience in managing REITs
to produce  increasing  distributions and have extensive  contacts in the senior
housing  industry.  Senior  Housing  believes  that  this  experience  and these
contacts will allow Senior Housing to keep abreast of industry  developments and
learn of business opportunities as they occur.


     The principals of Reit  Management,  Barry M. Portnoy and Gerard M. Martin,
founded  HRPT in 1986 as a public  company  with $63  million  invested in seven
healthcare properties leased to two tenants.  Since 1986, under the direction of
Messrs. Portnoy and Martin and other personnel of Reit Management, HRPT has made
51 consecutive  quarterly  distributions and has increased its distribution rate
13 times. In 1995 Reit Management organized Hospitality Properties,  a REIT that
invests in hotel  properties.  At its initial  public  offering in August  1995,
Hospitality  Properties  had $329  million  invested in 37 hotels  leased to one
tenant.  Since  it was  founded  in  1995,  Hospitality  Properties  has  raised
approximately $2 billion of capital, paid 16 consecutive quarterly distributions
and  increased  its  distribution  rate 11 times.  You should note that the past
success of Reit  Management  and its affiliate in managing HRPT and  Hospitality
Properties is not necessarily  indicative of what Senior  Housing's  performance
will be. In particular,  HRPT and Hospitality Properties have operated in market
conditions which are substantially different from the market conditions in which
Senior Housing will operate.


Senior Housing Real Estate Market

     Demand Growth.  Senior Housing  believes that three  important  demographic
trends  will  increase  demand for senior  apartments,  congregate  communities,
assisted living properties and nursing homes for the foreseeable future:

o    First,  the U.S. Census Bureau has projected that the U.S.  population over
     age 85 will  increase  from 3.1 million in 1990, to 4.3 million in 2000, to
     5.7 million in 2010 and to 6.5 million in 2020.  As people age they have an
     increasing  need for the type of  assistance  with daily living  activities
     that is provided in senior  apartments,  congregate  communities,  assisted
     living  properties  and nursing  homes.  This is because old age is usually
     accompanied by various physical  disabilities and because the aging process
     sometimes is accompanied by Alzheimer's disease and other forms of dementia
     that require specialized, secure housing.

o    Second,  societal  changes  during the past 35 years in the U.S.  have made
     senior  housing  more  often  required  than  in  historical  periods.  The
     increasing  percentage  of women  working away from their  homes,  the high
     divorce rate and societal  mobility  have all combined to make  traditional
     arrangements  of family  care for aging  relatives  less  available.  These
     social trends show no sign of reversal in the foreseeable future.

o    Third,  economic factors appear to encourage demand for specialized  senior
     housing  properties.  Although  some people extol the benefits of homemaker
     services and home healthcare,  it is generally more economically  efficient
     to congregate the elderly in properties with  specialized  services than to
     bring those services to diverse locations.  Similarly, the cost containment
     pressure to reduce lengths of stay for the elderly in high cost specialized
     properties such as hospitals has increased the need for  intermediate  care
     properties.

     Payment  Issues.  Since  the  introduction  of the  Medicare  and  Medicaid
programs in the late 1960s, governments have become the principal payment source
for senior housing properties in which healthcare services are provided, such as
nursing  homes.  In the past few years a number of  federal  and state laws have
been enacted to reduce the growth of Medicare and Medicaid  expenditures.  These
laws have made it less  profitable to own and operate senior housing  properties
in which healthcare services are provided.

                                       29
<PAGE>

     Senior Housing  believes that the net effect of the  increasing  demand for
senior  housing  properties  and the payment  limitations  in the  Medicare  and
Medicaid programs may make it increasingly  profitable to own and operate senior
housing properties which are able to attract residents who use private resources
to pay  occupancy  costs and  increasingly  less  profitable  to own and operate
senior housing properties which depend upon the Medicare and Medicaid programs.

Types of Properties

     Senior  Housing  expects to invest in properties  which offer four types of
senior housing accommodations,  including some properties that combine more than
one type in a single building or campus.


     Senior  Apartments.  Senior  apartments  are marketed to residents  who are
generally capable of caring for themselves. Residence is generally restricted on
the basis of age.  Purpose built  properties  may have special  function  rooms,
concierge  services,  high levels of security and  centralized  call buttons for
emergency use.  Tenants at these  properties  who need  healthcare or assistance
with the activities of daily living are expected to contract  independently  for
those services with homemakers or home healthcare companies.

     Congregate Communities. Congregate communities also provide a high level of
privacy to  residents  and require  residents to be capable of  relatively  high
degrees  of  independence.  Unlike a senior  apartment  property,  a  congregate
community  usually  bundles  several  services  as  part  of a  regular  monthly
charge--for  example,  one or two meals per day in a central dining room, weekly
maid service or a social director.  Additional  services are generally available
from staff  employees on a  fee-for-service  charge  basis.  In some  congregate
communities,  separate parts of the property are dedicated to assisted living or
nursing services.

     Assisted  Living  Properties.  Assisted  living  properties  are  typically
comprised of one bedroom suites which include  private  bathrooms and efficiency
kitchens.  Services  provided  usually  include three meals per day in a central
dining  room,  daily  housekeeping,  laundry,  medical  reminders  and  24  hour
availability  of assistance with the activities of daily living such as dressing
and bathing.  Professional nursing and healthcare services are usually available
at the facility on call or at regularly  scheduled times.  Since the early 1990s
there has been an  explosive  growth in the  number  of small  public  companies
developing  purpose built assisted living  properties.  Many of those properties
have  recently  been  completed  and  are now  fully  occupied  and  appropriate
investments for Senior Housing.

     Nursing  Homes.  Nursing  homes  generally  provide  extensive  nursing and
healthcare  services  similar to those available in hospitals,  without the high
costs  associated  with operating  theaters,  emergency  rooms or intensive care
units. A typical purpose built nursing home includes mostly two-bed rooms with a
separate  toilet in each room and shared  dining and  bathing  facilities.  Some
private  rooms are often  available  for those  residents  who can afford to pay
higher rates or for  patients  whose  medical  conditions  require  segregation.
Nursing homes are generally  staffed by licensed nursing  professionals 24 hours
per day.

     During the past few years nursing home owners and operators  have faced two
significant  business  challenges.  First,  the rapid  expansion of the assisted
living  industry  which  started in the early  1990s has  attracted  a number of
residents away from nursing homes. This was especially  significant  because the
residents who elected  assisted living  facilities had often previously been the
most profitable residents in the nursing  homes--residents who required a lesser
amount  of care  and who were  able to pay  higher  private  rates  rather  than
government  rates.  According to a 1998 study by SMG Marketing Group,  Inc., the
average  occupancy of U.S.  nursing homes declined from 93% in 1994 to about 88%
in 1997.

     The second major  challenge arose as a result of Medicare and Medicaid cost
containment laws beginning in 1994,  particularly 1997 federal  legislation that
required the Medicare  program to implement a  prospective  payment  program for
various subacute services  provided in skilled nursing homes.  Implementation of
this Medicare  prospective  payment program began on July 1, 1998.  Prior to the
prospective  payment  program  Medicare paid nursing home  operators  based upon
audited  costs for  services  provided.  The  prospective  payment  system  sets
Medicare  rates based upon  government  estimated  costs of  treating  specified
medical
                                       30

<PAGE>

conditions.  Although it is possible that a nursing home may increase its profit
if it is able to provide quality services at below average costs, Senior Housing
believes that the effect of the new Medicare rate setting methodology will be to
reduce the  profitability of Medicare  services in nursing homes. This belief is
based on similar Medicare changes that were implemented for hospitals during the
1980s.  Several of Senior Housing's tenants have recently  reported  significant
operating losses,  particularly  Mariner Post-Acute  Network,  Inc.,  Integrated
Health Services, Inc. and Genesis Health Ventures, Inc.


     Starting in 1995 HRPT formed the opinion  that the market  value of nursing
home  properties did not adequately  reflect the negative impact of then current
and emerging market conditions.  For this reason beginning in 1996 HRPT began to
limit its nursing home purchases and to dispose of nursing home properties which
were  dependent  upon  subacute  services paid by Medicare.  Senior  Housing now
believes  that the market is in the process of taking  account of these  factors
and  adjusting  the prices of  nursing  home  properties.  Senior  Housing  also
believes that the demographic factors described above combined with the adjusted
pricing levels may make nursing home properties  attractive  investments at this
time.  Senior Housing  expects to focus its future  assisted  living and nursing
home  investments in facilities  that have a high  percentage of  non-government
revenues.  When Senior Housing invests in assisted living properties and nursing
homes that are  dependent  upon  government  revenues it will attempt to set the
purchase  prices and rents at levels which are securely  covered by existing and
projected cash flows from its tenants' operations.


Government Regulations and Rate Setting

     Senior Apartments. Generally, government programs do not pay for housing in
senior  apartments.  Rents  are paid  from  the  residents'  private  resources.
Accordingly,  the government regulations that apply to these types of properties
are  generally  limited to  zoning,  building  and fire  codes,  Americans  with
Disabilities Act requirements and other life safety type regulations  applicable
to residential  real estate.  Government rent subsidies and government  assisted
development  financing  for low income  senior  housing are  exceptions to these
general  statements.  The development and operation of subsidized senior housing
properties  are  subject  to  numerous  governmental  regulations.  While  it is
possible  that Senior  Housing may  purchase  and lease some  subsidized  senior
apartment properties, it does not expect these investments to be a major part of
its future  business,  and today it owns no properties  where rent subsidies are
applicable.

     Congregate   Communities.   Senior  Housing   understands   that  generally
government benefits are not available to congregate communities and the resident
charges in these properties are paid from private  resources.  However, a number
of Federal  Supplemental  Security Income program benefits pay housing costs for
elderly or disabled residents to live in these types of residential  facilities.
The Social  Security Act requires states to certify that they will establish and
enforce  standards  for any  category  of group  living  arrangement  in which a
significant  number of  supplemental  security  income  residents  reside or are
likely to  reside.  Categories  of living  arrangements  which may be subject to
these  state  standards  include  congregate   facilities  and  assisted  living
properties.   Because  congregate   communities   usually  offer  common  dining
facilities, in many locations they are required to obtain licenses applicable to
food  service  establishments  in addition to  complying  with land use and life
safety  requirements.  In many states,  congregate  communities  are licensed by
state health  departments,  social  service  agencies,  or offices on aging with
jurisdiction over group residential  facilities for seniors.  To the extent that
congregate  communities  maintain  units in which  assisted  living  or  nursing
services are provided,  these units are subject to applicable state regulations.
In some states,  insurance or consumer  protection  agencies regulate congregate
communities in which residents pay entrance fees or prepay other costs.

     Assisted Living. According to the National Academy for State Health Policy,
by early 1999,  32 states  provided  Medicaid  payments  for  residents  in some
assisted  living  properties  under  waivers  granted by the Health Care Finance
Administration  of the U.S.  Department  of Health and Human  Services  or under
Medicaid state plans and three other states are planning to do so. Because rates
paid to assisted living property  operators are lower than rates paid to nursing
home  operators  some states use this waiver  program as a means of lowering the
cost of services for residents who may not need the higher  intensity of medical
care provided in nursing homes.  States that  administer  Medicaid  programs for
assisted  living  facilities are  responsible for monitoring

                                       31
<PAGE>

the  services  at  and  physical  conditions  of the  participating  properties.
Different  states apply  different  standards in these  matters,  but  generally
Senior Housing believes these monitoring  processes are similar to the concerned
states' inspection processes for nursing homes.

     Because of the large number of states using  Medicaid to purchase  services
at assisted  living  properties,  it is not surprising that a majority of states
have adopted  licensing  standards  applicable  to assisted  living  facilities.
According to a 1998 study by the National  Academy for State Health  Policy,  33
states had taken steps to implement  assisted  living  policies as of June 1998,
and 11 others had  instituted  processes  to study the issue.  According  to the
National  Conference  of State  Legislatures,  32  states  planned  to  consider
legislation  related to assisted  living during 1999.  State  regulatory  models
vary; there is no national  consensus on a definition of assisted living, and no
uniform approach by the states to regulating  assisted living  facilities.  Some
state licensing  standards apply to assisted  living  facilities  whether or not
they accept  Medicaid  funding.  Moreover,  the 1998 National  Academy for State
Health  Policy  study   referenced  above  found  that  several  states  require
certificates of need from state health planning  authorities before new assisted
living properties may be developed. Also, the study found that three states have
adopted moratoria on the development of new assisted living facilities. Based on
Senior Housing's analysis of current economic and regulatory trends, it believes
that assisted living properties that become dependent upon Medicaid payments for
a majority of their  revenues will decline in value because  Medicaid rates will
fail to keep up with increasing costs. For the same reason,  Senior Housing also
believes  that  assisted  living   properties   located  in  states  that  adopt
certificate of need  requirements  or otherwise  restrict the development of new
assisted living properties will increase in value because these limitations upon
development will help ensure higher occupancy and higher non-governmental rates.
Accordingly,  Senior Housing intends to focus new investments in assisted living
properties that are not overly dependent upon governmental revenues and that are
in areas where there are barriers to competition  created by certificate of need
laws or otherwise.

     One  federal  government  study  was  recently  completed  and  another  is
currently  underway to provide background  information and make  recommendations
regarding  the  regulation  of, and the  possibility  of increased  governmental
funding for, the assisted living industry. In April 1999, the General Accounting
Office  issued  a report  to the  Senate  Special  Committee  on  Aging  and the
Committee  held  hearings on consumer  protection  and quality of care issues in
assisted living  facilities.  The GAO studied assisted living facilities in four
states  and found a variety  of  residential  settings  serving a wide  range of
resident  health  and care  needs.  The GAO  found  that  providers  often  give
consumers  insufficient  information to determine whether a particular  facility
can meet their needs and that state  licensing  and  oversight  approaches  vary
widely.  The GAO anticipates  that as the states increase the use of Medicaid to
pay for assisted living,  federal financing will likewise grow, and these trends
will  focus  more  public  attention  on the  place of  assisted  living  in the
continuum of long-term care and upon state standards and compliance  approaches.
The  second  study is being  conducted  by the  Department  of Health  and Human
Services'  Assistant  Secretary for Planning and  Evaluation  and is expected to
touch upon all aspects of the assisted living industry including quality of care
and  financing.  The  1998  National  Academy  for  State  Health  Policy  study
referenced  above and an April  1999  report on a  national  survey of  assisted
living  facilities  are  part of this  second  study,  which is  expected  to be
completed during 1999.  Senior Housing cannot predict whether these studies will
result in  governmental  policy changes or new  legislation,  or what impact any
changes may have.  Based upon its analysis of current  economic  and  regulatory
trends, Senior Housing does not believe that the federal government is likely to
have a material  impact upon the  current  regulatory  environment  in which the
assisted living industry  operates  unless it also undertakes  expanded  funding
obligations;  and  Senior  Housing  does  not  believe  a  materially  increased
financial  commitment from the federal government is presently likely.  However,
it does anticipate that assisted living facilities will increasingly be licensed
and  regulated  by the  various  states,  and that with the  absence  of federal
standards, the states' policies will continue to vary widely.

     Nursing  Homes.  About 67% of all nursing  home  revenues in 1997 came from
government Medicare and Medicaid programs. Nursing homes are also among the most
highly regulated  businesses in the country.  The federal and state  governments
regularly  monitor the quality of care  provided at nursing  homes and regularly
inspect the  physical  condition  of nursing  home  properties.  These  periodic
inspections   and   occasional   changes  in  life  safety  and  physical  plant
requirements  sometimes  require  nursing home owners to spend money for

                                       32
<PAGE>

capital  improvements.  These  mandated  capital  improvements  have in the past
usually resulted in Medicare and Medicaid rate adjustments,  albeit on the basis
of amortization of expenditures  over extended useful lives of the improvements.
However,  under the new Medicare  payment  system  capital costs are part of the
prospective rate and will not be facility specific. Other recent legislative and
regulatory  actions  with  respect  to state  Medicaid  rates  and the  Medicare
prospective  payment system which began being phased in during 1998 are limiting
the reimbursement levels for some nursing home and other eldercare services.  At
the same time federal  enforcement and oversight of nursing homes is increasing,
thereby making  licensing and  certification  of these facilities more rigorous.
These actions have adversely affected the revenues and increased the expenses of
many nursing home operators, including several of Senior Housing's tenants.


     The  federal  Health  Care  Financing  Administration,  HCFA,  has begun to
implement an  initiative  to increase  the  effectiveness  of  Medicare/Medicaid
nursing facility survey and enforcement  activities.  HCFA's initiative  follows
its July  1998  report  to  Congress  on the  effectiveness  of the  survey  and
enforcement  system,  several  March 1999 reports by HCFA's  Office of Inspector
General  concerning  quality  of care in  nursing  homes,  a July  1998  General
Accounting  Office  investigation  which found  inadequate care in a significant
proportion  of  California   nursing  homes,  a  March  1999  GAO  report  which
recommended that HCFA and the states strengthen their compliance and enforcement
practices to better ensure that nursing homes provide  adequate care, and recent
hearings by the Senate Special Committee on Aging on these issues. HCFA plans to
focus survey and enforcement  efforts at nursing homes with repeat violations of
Medicare/Medicaid  standards,  including chain-operated facilities with patterns
of  noncompliance.  HCFA also plans to require state agencies to use enforcement
sanctions and remedies more promptly and effectively  when  substandard  care is
identified.  HCFA is  increasing  its  oversight  of state survey  agencies.  In
addition HCFA has adopted new regulations  expanding federal and state authority
to impose civil money penalties in instances of noncompliance. Medicare/Medicaid
survey  results for each nursing home are being posted on the internet.  Federal
efforts to target fraud and abuse by Medicare and Medicaid  providers  have also
increased.   An  adverse  determination   concerning  any  tenant's  license  or
eligibility for Medicare or Medicaid reimbursement could restrict its ability to
pay rent.


     Most states also limit the number of nursing homes by requiring  developers
to obtain certificates of need before new facilities may be built. Even in those
states such as California  and Texas that have  eliminated  certificate  of need
laws, the state health authorities usually have retained other means of limiting
new  nursing  home  development.  Examples  of these  other means are the use of
licensing laws or limitations upon  participation in the state Medicaid program.
Senior  Housing  believes that these  governmental  limitations  generally  make
nursing  home  properties  more  valuable by  extending  their  useful lives and
limiting competition.

Competition

     Several REITs which own apartments  have focused some of their  investments
on senior apartments.  In addition,  there are several publicly owned REITs that
today focus upon  investing in healthcare  real estate.  Also,  some asset based
finance  companies and banks have  marketing  programs to provide sale leaseback
and mortgage financing for these types of properties.  Some of these competitors
have  resources  that are greater than those which  Senior  Housing has and some
have a lower cost of capital. For example,  Pacific Gulf Properties,  Inc. is an
established REIT with $876 million in total assets that develops and owns senior
housing properties.  Healthcare  Property  Investors,  Inc., with assets of $1.5
billion,  and Nationwide Health  Properties,  Inc., with assets of $1.4 billion,
both  emphasize  investments  in assisted  living  properties and both have good
access to debt capital because of their investment grade ratings.  Also, GMAC, a
finance affiliate of General Motors  Corporation,  has a group of personnel that
focus upon making  nursing home  mortgage  loans.  Nonetheless,  Senior  Housing
believes that it will be able to successfully compete for new investments for at
least five reasons:


     First,  Senior Housing will commence  business with a large and diversified
portfolio of properties that are subject to long term leases.

                                       33
<PAGE>

     Second, unlike most of its competitors,  Senior Housing will be exclusively
focused on senior housing  properties.  Senior Housing does not intend to invest
in medical  office  buildings  or any  properties  which do not benefit from the
projected aging of the American population.

     Third,  current market  conditions  have created an  opportunity  for a new
market  entrant  to invest  in  senior  housing  properties.  A large  number of
recently  developed  properties are currently  available for purchase.  Concerns
about the new Medicare  prospective  payment system have limited capital for new
development and have reduced financing  alternatives available to some of Senior
Housing's  competitors and prospective tenants.  These same concerns have caused
nursing  homes to be  revalued so that  purchase  prices and rents can be set at
levels which are well covered by current and projected property operations.

     Fourth, Senior Housing's proposed methods of doing business are intended to
be attractive to prospective  sellers and tenants.  Senior Housing intends to do
business with sellers and tenants who are unaffiliated with it and to retain the
financial flexibility to work with tenants to meet their business  requirements.
Some of Senior  Housing's REIT  competitors  are under common control with large
tenants  which  compete with other  prospective  tenants.  This fact often makes
sellers and tenants  reluctant to disclose to their  competitors  the  operating
information  necessary  for  a  successful  transaction.  Some  of  the  finance
companies that target healthcare property  investments and some healthcare REITs
that  emphasize  mortgage  lending depend upon the asset backed bond markets for
funding.  Asset backed financing has historically afforded borrowers and tenants
limited  flexibility to adjust mortgage or lease terms to accommodate changes in
the tenants'  businesses  during long term leases.  Although  Senior Housing may
borrow on a secured  basis,  it expects to retain  title to all of its  property
investments  in order to be able to work with  tenants  to meet  their  business
requirements.


     Finally, and perhaps most importantly, Senior Housing's investment advisor,
Reit Management,  and Messrs. Portnoy, Martin, Hegarty and Saini have experience
and contacts in the senior  housing real estate  market based upon their history
of acquiring and managing senior housing investments through HRPT.


                                       34
<PAGE>

                       SENIOR HOUSING DISTRIBUTION POLICY


     After  completion of the spin-off,  Senior Housing  intends to make regular
quarterly  distributions  to  shareholders.  The  initial  distribution  for the
quarter ended September 30, 1999 will be $0.60 per share. Senior Housing intends
to maintain this rate for one year  following the spin-off  unless its operating
results differ materially from what it now expects.  Senior Housing expects that
this  distribution  rate will exceed its  minimum  distribution  requirement  to
maintain  REIT status and will exceed its earnings.  Distributions  in excess of
earnings  represent return of capital for federal income tax purposes.  Assuming
that its  distribution  rate remains  unchanged for the next year,  and that its
earnings for this period are as estimated  in the table  below,  Senior  Housing
estimates that  approximately 18% of its annual  distributions in its first year
of operations will be a return of capital.  The percent of annual  distributions
which will be a return of capital  for tax  purposes  will vary from tax year to
tax year.  Under current law,  distributions  in excess of earnings  which are a
return of capital are not taxable but these amounts reduce a shareholder's basis
in his shares,  and,  accordingly,  increase taxable gains when shares are sold.
For a more  detailed  discussion  of the tax  consequences  of Senior  Housing's
distributions, see "Federal Income Tax and ERISA Consequences" beginning on page
75 of this prospectus.


     The initial  distribution rate was set based upon Senior Housing's estimate
of the cash available for  distribution and FFO it believes it will realize from
its existing  properties  during the year  following  the  spin-off.  All future
distributions will be set by its board of trustees.  When deciding the amount of
future distributions Senior Housing expects its board of trustees will primarily
consider  the actual  cash  available  for  distribution  and FFO  realized  and
projections  of future cash  available for  distribution  and FFO.  However,  in
making these decisions the board may consider  capital  requirements,  the legal
requirements  that REITs  distribute  at least 95% of net taxable  earnings  and
other factors the board deems  relevant from time to time. The amounts of future
cash  available for  distribution,  FFO and  distributions  are not now known or
knowable and they cannot be assured.

     The following  table sets forth Senior  Housing's  calculation of estimated
earnings,  FFO  and  cash  available  for  distribution  for the  twelve  months
following the spin-off. In making these estimates Senior Housing has started its
calculation with historical  audited  operating  results and made adjustments to
reflect known events which have occurred and events which it expects to occur at
or shortly after the completion of the spin-off.  In this  calculation no effect
is shown from changes in working  capital,  i.e.,  changes in current  assets or
current  liabilities,  because  these  changes are not  expected to be material.
Similarly,  except for the $200 million to be borrowed  under  Senior  Housing's
bank credit  facility,  no effect is shown from  possible  future  financing  or
investing  activities  because  these  activities  cannot now be  estimated.  In
considering  this table you should  recognize  that FFO and cash  available  for
distribution  may not be as good a measure of operating  performance as earnings
determined  according  to generally  accepted  accounting  principles,  or GAAP.
Similarly,  FFO  and  cash  available  for  distribution  are  not  intended  to
substitute  for cash flow  determined  according  to GAAP.  Cash  available  for
distribution and FFO are presented  because Senior Housing believes they will be
a basis used by investors to compare  Senior  Housing's  operating  results with
those of other  REITs,  because  they were used to set the initial  distribution
rate and because  Senior Housing  expects they will be important  considerations
used by Senior Housing's board of trustees to determine future distributions.


                                       35

<PAGE>
<TABLE>
<CAPTION>
                            Calculation of Estimated Earnings, FFO and Cash Available
                          for Distribution for the Twelve Months following the Spin-Off
                                 (000s except per share amounts and percentages)

                                                                                                       Pro Forma
                                                                                                       ---------
<S>                                                                                                   <C>


Net income for the year ended December 31, 1998                                                        $52,191
   Plus:  net income for the six months ended June 30, 1999                                             24,543
   Less:  net income for the six months ended June 30, 1998                                            (25,469)
                                                                                                       -------

Net income for the 12 months ended June 30, 1999                                                        51,265

Plus adjusted real estate depreciation for the 12 months following completion of the
   spin-off (1)                                                                                         20,466
                                                                                                       -------

FFO for the 12 months following completion of the spin-off (2)                                          71,731

Net effect of non-cash rents (3)                                                                        (3,076)
                                                                                                       -------

Estimated cash flow from operating activities for the 12 months following completion of
   the spin-off (4)                                                                                    $68,655
                                                                                                       =======

Estimated cash available for distribution for the 12 months following completion of the spin-off       $68,655
                                                                                                       =======

Estimated cash distributions for the 12 months following completion of the spin-off (5)                $62,400
                                                                                                       =======

Initial annual distribution per share (5)                                                                $2.40
                                                                                                       =======

Estimated percentage of distributions in excess of net income for the 12 months following
   completion of the spin-off, i.e., return of capital (6)                                                17.8%
                                                                                                       =======

Distribution payout ratio of estimated cash available for distribution for the 12 months following
   completion of the spin-off (7)                                                                         90.9%
                                                                                                       =======

- ------------------

<FN>
(1)  Pro forma real estate  depreciation  for the year ended  December 31, 1998, of $18.5 million plus pro forma
     real estate  depreciation  for the six months ended June 30, 1999,  of $11.2  million  minus pro forma real
     estate depreciation for the six months ended June 30, 1998, of $9.2 million.
(2)  Funds from operations or "FFO," as defined in the white paper on funds from  operations  which was approved
     by the Board of Governors of NAREIT in March 1995, is net income computed in accordance  with GAAP,  before
     gains or losses from sales of properties and  extraordinary  items,  plus depreciation and amortization and
     after adjustment for unconsolidated  partnerships and joint ventures. Senior Housing considers FFO to be an
     appropriate  measure of performance  for an equity REIT,  along with cash flow from  operating  activities,
     financing  activities  and investing  activities,  because it provides  investors  with an indication of an
     equity REIT's ability to incur and service debt,  make capital  expenditures,  pay  distributions  and fund
     other cash needs. Senior Housing computes FFO in accordance with the standards  established by NAREIT which
     may not be  comparable  to FFO reported by other REITs that do not define the term in  accordance  with the
     current  NAREIT  definition  or that  interpret the current  NAREIT  definition  differently.  FFO does not
     represent cash generated by operating activities in accordance with GAAP and should not be considered as an
     alternative to net income, determined in accordance with GAAP, as an indication of financial performance or
     the cash flow from operating activities, determined in accordance with GAAP, as a measure of liquidity.
(3)  Represents the difference between annual rental revenue calculated in accordance with GAAP and cash amounts
     currently being paid by tenants.
(4)  For  purposes  of this  presentation  there are  assumed to be no  significant  sources or uses of cash for
     investing and financing  activities for the 12 months  following  completion of the spin-off because Senior
     Housing is not now able to estimate these sources and uses.
(5)  Based on a total of 26 million  shares to be  outstanding  after the spin-off  and  assuming no  additional
     shares are issued and that the distribution rate remains unchanged.

                                                       36
<PAGE>


(6)  This  estimated  percentage is calculated as the excess of estimated cash  distributions  for the 12 months
     following the spin-off of  $62,400,000  over pro forma net income for the 12 months ended June 30, 1999, of
     $51,265,000  divided  by  estimated  cash  distributions  for  the 12  months  following  the  spin-off  of
     $62,400,000.
(7)  The  distribution  payout ratio of estimated  pro forma FFO for the 12 months  following  completion of the
     spin-off will be 87.0%.

</FN>

</TABLE>
                                                       37
<PAGE>

                            SENIOR HOUSING PROPERTIES

     Senior  Housing has  investments  totaling  $770  million in 93  properties
located in 26 states:

[Graphic  Omitted - Map of United  States  showing  location  of Senior  Housing
properties by state]

<TABLE>
<CAPTION>
                            No. of                                                      No. of
     State                Properties          Investment             State            Properties      Investment
     -----                ----------          ----------             -----            ----------      ----------
                                                (000s)                                                  (000s)
<S>                           <C>             <C>               <C>                     <C>            <C>


Arizona                        6                $42,861           Missouri                 2             $3,788
California                     8                 53,879           Nebraska                10             10,667
Colorado                       8                 34,348           New Jersey               1             13,007
Connecticut                    6                 53,762           New York                 1             10,700
Florida                        5                131,990           North Carolina           3              6,389
Georgia                        4                 12,308           Ohio                     1              3,445
Illinois                       2                 98,742           Pennsylvania             1             15,598
Iowa                           6                  8,207           South Dakota             3              7,589
Kansas                         1                  1,320           Texas                    1             12,410
Louisiana                      1                 18,887           Virginia                 3             57,666
Maryland                       1                 33,080           Washington               2             19,542
Massachusetts                  4                 69,562           Wisconsin                8             33,904
Michigan                       2                  9,135           Wyoming                  3              7,245
                                                                                       -----          ---------
                                                                  Total                   93           $770,031
                                                                                       =====          =========

</TABLE>

                                                       38
<PAGE>

     The following  table  presents  information  about the 93  properties  that
Senior Housing owns, grouped by tenant:
<TABLE>
<CAPTION>

                                                      Built/                                  Historical Investment
          Location          Property Type          Renovated(1)            Units/Beds(2)           at Cost (3)
          --------          -------------          ------------            -------------           -----------
                                                                                                      (000s)
<S>                         <C>                      <C>                       <C>                 <C>
Marriott International, Inc.

Scottsdale, AZ               Assisted Living           1990                     148                  $9,926
Sun City, AZ                 Assisted Living           1990                     148                  11,916
Laguna Hills, CA             Congregate Care           1991                     402                  31,791
Boca Raton, FL               Congregate Care           1999                     347                  44,836
Deerfield Beach, FL          Congregate Care           1986                     288                  16,935
Fort Myers, FL               Congregate Care           1987                     463                  23,905
Palm Harbor, FL              Congregate Care           1992                     319                  33,863
Port St. Lucie, FL           Assisted Living           1993                     128                  12,451
Arlington Heights, IL        Congregate Care           1986                     363                  36,742
Silver Spring, MD            Congregate Care           1992                     351                  33,080
Bellaire, TX                 Assisted Living           1991                     145                  12,410
Arlington, VA                Congregate Care           1992                     419                  18,889
Charlottesville, VA          Congregate Care           1991                     315                  29,829
Virginia Beach, VA           Assisted Living           1990                     114                   8,948
                                                                          ---------------------------------
                                                                              3,950                 325,521
Brookdale Living Communities, Inc.

Mesa, AZ                     Congregate Care           1985                     185                  14,800
Chicago, IL                  Congregate Care           1990                     341                  62,000
Brighton, NY                 Congregate Care           1988                     103                  10,700
Spokane, WA                  Congregate Care           1993                     200                  14,350
                                                                          ---------------------------------
                                                                                829                 101,850
Mariner Post-Acute Network, Inc.

Phoenix, AZ                  Nursing Home              1984                     127                   3,185
Yuma, AZ                     Nursing Home              1984                     128                   2,326
Yuma, AZ                     Congregate Care           1984                      65                     708
Fresno, CA                   Nursing Home              1985                     180                   3,503
Lancaster, CA                Nursing Home              1994                      99                   3,488
Newport Beach, CA            Nursing Home              1994                     167                   4,128
Stockton, CA                 Nursing Home              1991                     122                   3,136
Tarzana, CA                  Nursing Home              1969                     192                   3,060
Thousand Oaks, CA            Nursing Home              1970                     124                   3,454
Van Nuys, CA                 Nursing Home              1984                      58                   1,319
Lakewood, CO                 Nursing Home              1985                     175                   4,721
Littleton, CO                Nursing Home              1965                     230                   5,576
Concord, NC                  Nursing Home              1990                     110                   2,216
Wilson, NC                   Nursing Home              1990                     119                   2,402
Winston-Salem, NC            Nursing Home              1990                      80                   1,771
Huron, SD                    Nursing Home              1977                     163                   3,256
Huron, SD                    Congregate Care           1968                      59                   1,014
Sioux Falls, SD              Nursing Home              1979                     139                   3,319
Brookfield, WI               Nursing Home              1995                     226                  12,697


           39

<PAGE>
<CAPTION>

                                                      Built/                                  Historical Investment
          Location          Property Type          Renovated(1)            Units/Beds(2)           at Cost (3)
          --------          -------------          ------------            -------------           -----------
                                                                                                      (000s)
<S>                         <C>                      <C>                       <C>                 <C>

Clintonville, WI             Nursing Home              1965                      78                  $1,761
Clintonville, WI             Nursing Home              1969                     109                   1,747
Madison, WI                  Nursing Home              1987                      73                   1,887
Milwaukee, WI                Nursing Home              1983                     215                   5,043
Milwaukee, WI                Nursing Home              1997                     102                   1,601
Pewaukee, WI                 Nursing Home              1969                     237                   3,416
Waukesha, WI                 Nursing Home              1995                     105                   5,752
                                                                          ---------------------------------
                                                                              3,482                  86,486

Integrated Health Services, Inc. (Lease No. 1)

Canon City, CO(4)            Nursing Home/             1984                     157                   6,520
                             Senior Apartments
Colorado Springs, CO         Nursing Home              1996                     132                   5,481
Delta, CO                    Nursing Home              1978                     100                   3,737
Grand Junction, CO           Nursing Home              1986                     120                   4,408
Grand Junction, CO           Nursing Home              1995                      82                   3,905
College Park, GA             Nursing Home              1985                     100                   3,025
Dublin, GA                   Nursing Home              1968                     130                   4,504
Glenwood, GA                 Nursing Home              1972                      62                   1,742
Marietta, GA                 Nursing Home              1973                     109                   3,037
Clarinda, IA                 Nursing Home              1968                     117                   1,823
Council Bluffs, IA           Nursing Home              1963                      62                   1,217
Mediapolis, IA               Nursing Home              1973                      62                   2,121
Pacific Junction, IA         Nursing Home              1978                      12                     343
Winterset, IA (4)            Nursing Home/             1995                     118                   2,703
                             Senior Apartments
Ellinwood, KS                Nursing Home              1972                      59                   1,320
Tarkio, MO                   Nursing Home              1996                      95                   2,455
Ainsworth, NE (5)            Nursing Home              1995                      50                     447
Ashland, NE (5)              Nursing Home              1996                     101                   1,859
Blue Hill, NE (5)            Nursing Home              1996                      81                   1,125
Edgar, NE (5)                Nursing Home              1995                      54                     139
Grand Island, NE             Nursing Home              1996                      80                   1,934
Gretna, NE (5)               Nursing Home              1995                      62                     944
Lyons, NE (5)                Nursing Home              1974                      84                     814
Milford, NE (5)              Nursing Home              1970                      66                     908
Sutherland, NE (5)           Nursing Home              1995                      62                   1,276
Waverly, NE (5)              Nursing Home              1995                      50                   1,221
Laramie, WY                  Nursing Home              1986                     144                   4,022
Worland, WY (4)              Nursing Home/             1996                      99                   3,223
                             Senior Apartments
                                                                         ----------------------------------
                                                                              2,450                  66,253
Integrated Health Services, Inc. (Lease No. 2)

Cheshire, CT (6)             Nursing Home              1971                     210                  $9,459
Waterbury, CT (6)            Nursing Home              1974                     180                  10,941
New Haven, CT (6)            Nursing Home              1971                     195                  17,870
Slidell, LA (7)              Nursing Home              1989                     118                  18,887
Middleboro, MA               Nursing Home              1987                     124                  17,523
Worcester, MA                Nursing Home              1990                     173                  18,769
Boston, MA                   Nursing Home              1985                     201                  24,978
Hyannis, MA                  Nursing Home              1982                     142                   8,292
Howell, MI (7)               Nursing Home              1985                     189                   4,956


                                                     40

<PAGE>
<CAPTION>

                                                      Built/                                  Historical Investment
          Location          Property Type          Renovated(1)            Units/Beds(2)           at Cost (3)
          --------          -------------          ------------            -------------           -----------
                                                                                                      (000s)
<S>                         <C>                      <C>                       <C>                 <C>

Farmington, MI (7)           Nursing Home              1991                     153                   4,179
Canonsburg, PA               Nursing Home              1990                     140                  15,598
                                                                          ---------------------------------
                                                                              1,825                 151,452
Genesis Health Ventures, Inc.

Burlington, NJ               Nursing Home              1994                     150                  13,007
                                                                          ---------------------------------
                                                                                150                  13,007
Private Company Tenants

St. Joseph, MO               Nursing Home              1976                     120                   1,333
Seattle, WA                  Nursing Home              1964                     103                   5,192
Waterford, CT                Nursing Home              1989                     148                   5,253
Killingly, CT                Nursing Home              1989                     190                   6,060
Willimantic, CT              Nursing Home              1989                     124                   4,179
Grove City, OH               Nursing Home              1965                     200                   3,445
                                                                          ---------------------------------
                                                                                885                  25,462
                                                                          ---------------------------------

Total Portfolio                                                              13,571                $770,031
                                                                          =================================

- --------------

<FN>
(1)  The dates  presented  are the later of the date of  original  construction  or the date of  substantial
     renovation as evidenced by capital expenditures in excess of 20% of HRPT's historical investment.
(2)  Units/beds are a customary measure of property values used in the senior housing industry.
(3)  Represents HRPT's historical costs before depreciation.
(4)  Two properties are located at each of these locations.
(5)  These  properties  are mortgage  investments.  HRPT had nominal  price  purchase  options for all these
     mortgaged properties which have been assigned to Senior Housing.
(6)  These three properties are managed by Integrated Health.  Under this management  agreement,  Integrated
     has guaranteed the rent for these  properties and that rent obligation is subject to cross default with
     other obligations under Integrated's Lease No. 2.
(7)  These properties are mortgage investments. The mortgage collateral secures all Integrated's obligations
     under Lease No. 2 and the mortgages are subject to cross default with  Integrated's  other  obligations
     under this lease.
</FN>

</TABLE>

                                                     41
<PAGE>

     The following  table presents  operating  information  about the occupancy,
gross revenues and revenue  sources of Senior  Housing's  properties  grouped by
leases and the amount of annual  rents  payable to Senior  Housing  under  these
leases:

<TABLE>
<CAPTION>

                                                         Property Level Operating Information(1)
                                                  ----------------------------------------------------
                                                                                      Percentage of
                                                                                    Facility Revenues
                                      Senior                                        from Sources other
                                      Housing       Facility      Facility                than
Tenant                                 Rents       Occupancy      Revenues          Medicare/Medicaid
- ------                               ---------     ---------     ---------          -----------------
                                     (in 000s)                   (in 000s)

<S>                                 <C>               <C>         <C>                     <C>
Marriott International, Inc.         $ 30,894          93%         $132,802                94%

Brookdale Living Communities, Inc.     11,074          95%           21,226               100%

Mariner Post-Acute Network, Inc.       16,716          84%          142,423                22%

Integrated Health Services, Inc.
(Lease No. 1)                           8,826          79%           70,419                33%

Integrated Health Services, Inc.
(Lease No. 2)                          18,085          82%           97,294                12%

Genesis Health Ventures, Inc.           1,444          97%            9,141                32%

Private Company Tenants                 3,489          81%           44,954                16%
                                     --------    --------          --------          --------

                                     $ 90,528          86%         $521,786                43%
                                     ========    ========          ========          ========

- ------------------------------------
<FN>

(1)  Represents  actual data for the one year period ended June 30,  1999,  except for Marriott
     data,  which is for the 36 week  period  ended  September  9, 1998,  the most  recent data
     available to Senior Housing, annualized.  Actual Marriott facility revenue for the 36 week
     period ended September 9, 1998, was $92.6 million;  for the one year period ended December
     31, 1997,  the most recent full year period for which Marriott data is available to Senior
     Housing,  facility  occupancy was 96%, facility revenue was $128.6 million and the percent
     of facility revenue from sources other than Medicare/Medicaid was 93%.
</FN>

</TABLE>

                                               42
<PAGE>

                                                  SENIOR HOUSING TENANTS


     Senior Housing's  financial  condition depends, in part, upon the financial
condition  of  its  tenants.   Senior  Housing's  largest  tenant  is  Marriott.
Ninety-six percent of Senior Housing's rent is paid by public companies.  If you
want more information  about any of Senior Housing's  publicly owned tenants you
should  study the public  information  which  they have filed with the SEC.  The
following  charts  show Senior  Housing's  mix of tenants on the basis of annual
current rent:


                                             By Annual Rent
                                             --------------

o     $91 million total annual
      current rent                           [Graphic  Omitted  - Pie Chart

                                             Marriott International        34%
o     96% of rent comes from                   $30.9 million
      public companies
                                             Brookdale Living Communities  12%
o     34% of rent comes from                   $11.1 million
      Marriott
                                             Mariner Post-Acute Network    18%
o     leases for 99% expire                    $16.7 million
      in 2005 or after
                                             Integrated Health Services    10%
                                              Lease No. 1
                                               $8.8 million

                                             Integrated Health Services    20%
                                              Lease No. 2
                                               $18.1 million

                                             Genesis Health Ventures        2%
                                               $1.4 million

                                             Other Operators                4%
                                               $3.5 million]

Marriott International, Inc.

     Marriott  is  a  NYSE  listed  company.  Marriott's  major  businesses  are
developing,  operating  and  managing  hotels,  senior  housing  properties  and
time-share resorts.  Senior Housing currently owns 14 congregate communities and
assisted  living  properties with 3,950 units that are leased to subsidiaries of
Marriott.  The annual  rent under this lease is $30.9  million,  which is 34% of
Senior Housing's total annual rent. Marriott International,  Inc. has guaranteed
all of these lease obligations to Senior Housing.


     The following table presents summary financial information of Marriott from
its Annual Report on Form 10-K for the year ended January 1, 1999, and Quarterly
Report on Form 10-Q for the period ended June 18, 1999.

<TABLE>
<CAPTION>
                      Summary Financial Information of Marriott International, Inc.
                                               (in millions)

                                                                                          As of or for the
                                        As of or for the year ended                     24 weeks ended
                                 ------------------------------------------        -----------------------
                                 January 3,      January 2,      January 1,         June 19,      June 18,
                                    1997            1998            1999              1998          1999
                                 ----------      ----------      ----------         --------      --------
<S>                               <C>             <C>              <C>              <C>            <C>
Sales                              $5,738          $7,236           $7,968           $3,642         $3,937
Net income                            270             324              390              190            214
Total assets                                        5,161            6,233                           6,559
Debt                                                  422            1,267                           1,178

</TABLE>

                                                    43
<PAGE>

Integrated Health Services, Inc.

     Integrated is a NYSE listed  company.  Integrated's  major  businesses  are
operating nursing homes and providing home healthcare  services.  Senior Housing
currently  owns 27 nursing  homes and three senior  apartments  with 3,205 units
that are leased to subsidiaries of Integrated.  In addition,  Senior Housing has
mortgage  investments  secured by 12 nursing homes with 1,070 units. Annual rent
of $22.8 million and interest of $4.1 million total to $26.9 million,  or 30% of
Senior Housing's total annual revenues. These 42 properties are divided into two
pools,  and the obligations  under the leases and mortgages within each pool are
subject  to  cross  default  and  collateralization  covenants  with  all  other
properties in the same pool.  Integrated  has  guaranteed all of these lease and
mortgage obligations to Senior Housing.


     The following table presents  summary  financial  information of Integrated
from its Annual  Report on Form 10-K for the year ended  December 31, 1998,  and
Quarterly Report on Form 10-Q for the period ended June 30, 1999.

<TABLE>
<CAPTION>
                     Summary Financial Information of Integrated Health Services, Inc.
                                               (in millions)

                                                                                   As of or for the
                                       As of or for the year ended                  six months ended
                                              December 31,                              June 30,
                              ---------------------------------------------   ---------------------------
                                   1996            1997           1998             1998          1999
                                   ----            ----           ----             ----          ----
<S>                               <C>            <C>            <C>             <C>           <C>
Total revenue                      $1,204         $1,403         $2,972          $1,502        $1,244
Earnings (loss) from
   continuing operations               48              3            137              83           (11)
Net earnings (loss)                    46            (34)           (68)             79           (11)
Total assets                                       5,002          5,393                         5,404
Debt                                               3,219          3,383                         3,451

</TABLE>

Mariner Post-Acute Network, Inc.

     Mariner is a NYSE listed company. Mariner's principal business is operating
nursing homes. Senior Housing currently owns 24 nursing homes and two congregate
communities  with 3,482 units that are leased to  subsidiaries  of Mariner.  The
annual rent under this lease is $16.7 million,  which is 18% of Senior Housing's
total annual rent.  Mariner has  guaranteed  all of these lease  obligations  to
Senior Housing.


     The following table presents summary financial  information of Mariner from
its  Annual  Report on Form 10-K for the year  ended  September  30,  1998,  and
Quarterly Report on Form 10-Q for the period ended June 30, 1999.

<TABLE>
<CAPTION>

                     Summary Financial Information of Mariner Post-Acute Network, Inc.
                                               (in millions)


                                                                                    As of or for the
                                       As of or for the year ended                 nine months ended
                                              September 30,                             June 30,
                              ---------------------------------------------   ----------------------------
                                   1996            1997            1998            1998           1999
                                   ----            ----            ----            ----           ----
<S>                               <C>            <C>             <C>             <C>            <C>
Net revenue                        $1,114         $1,140          $2,036          $1,403         $1,775
Net income (loss)                      43             44            (210)            (46)          (524)
Total assets                                         874           3,037                          2,596
Debt                                                 253           1,978                            822


</TABLE>

                                                    44
<PAGE>

Brookdale Living Communities, Inc.

     Brookdale is a Nasdaq listed  company.  Brookdale's  principal  business is
operating senior housing and congregate  communities.  Senior Housing  currently
owns four congregate  communities with 829 units that are leased to a subsidiary
of Brookdale. The annual rent under this lease is $11.1 million, which is 12% of
Senior Housing's total annual rent.  Brookdale has guaranteed all of these lease
obligations to Senior Housing.


     The following  table presents  summary  financial  information of Brookdale
from its Annual  Report on Form 10-K for the year ended  December 31, 1998,  and
Quarterly Report on Form 10-Q for the period ended June 30, 1999.

<TABLE>
<CAPTION>
                    Summary Financial Information of Brookdale Living Communities, Inc.
                                                 (in 000s)

                                                                                    As of or for the
                                               As of or for the year ended          six months ended
                                                       December 31,                     June 30,
                                               ----------------------------   --------------------------
                                                  1997(1)         1998             1998          1999
                                                  -------         ----             ----          ----
<S>                                                <C>           <C>             <C>            <C>
Total revenue                                      $30,237       $77,701         $35,549        $51,634
Net income                                             445         6,654           2,632          5,397
Total assets                                       183,169       244,633                        339,451
Debt                                                96,167       106,877                        192,729


<FN>
(1)  Total revenue and net income are for the period from May 7, 1997 (inception) through December 31, 1997.
</FN>
</TABLE>

Genesis Health Ventures, Inc.

     Genesis is a NYSE listed company.  Genesis' major  businesses are operating
nursing homes,  congregate  communities and assisted living  properties.  Senior
Housing  currently  owns one  nursing  home with 150  units  that is leased to a
subsidiary of Genesis.  The annual rent under this lease is $1.4 million,  which
is 2% of Senior Housing's total annual rent.


     The following table presents summary financial  information of Genesis from
its  Annual  Report on Form 10-K for the year  ended  September  30,  1998,  and
Quarterly Report on Form 10-Q for the period ended June 30, 1999.

<TABLE>
<CAPTION>

                              Summary Financial Information of Genesis Health Ventures, Inc.
                                                       (in millions)

                                                                                    As of or for the
                                       As of or for the year ended                 nine months ended
                                              September 30,                             June 30,
                              ---------------------------------------------   --------------------------
                                   1996          1997            1998             1998          1999
                                   ----          ----            ----             ----          ----
<S>                               <C>          <C>             <C>               <C>          <C>
Total net revenue                  $671         $1,100          $1,405            $999         $1,409
Net income (loss)                    37             48             (24)             41              2
Total assets                                     1,434           2,627                          2,698
Debt                                               660           1,408                          1,503

</TABLE>
                                                    45
<PAGE>

Privately Owned Tenants

     In addition to the publicly owned tenants  described above,  Senior Housing
currently  leases  six  nursing  homes  with 885 beds to four  separate  private
company tenants. These leases require total annual rent of $3.5 million. None of
these private  companies has significant net worth or significant other business
activities.


     Four of Senior Housing's  properties leased to two of these private tenants
were originally  leased to Sun Healthcare Group, Inc. These properties have been
subleased  and the new tenants  have  assumed  direct  responsibility  for these
leases.  Sun has also remained  obligated under the leases.  The following table
presents summary financial  information of Sun from its Annual Report on Form 10
- -K for the year ended December 31, 1998,  and Quarterly  Report on Form 10-Q for
the period ended June 30, 1999.

<TABLE>
<CAPTION>

                        Summary Financial Information of Sun Healthcare Group, Inc.
                                               (in millions)

                                                                                    As of or for the
                                       As of or for the year ended                  six months ended
                                              December 31,                              June 30,
                              --------------------------------------------     -------------------------
                                   1996            1997            1998            1998           1999
                                   ----            ----            ----            ----           ----
<S>                              <C>             <C>             <C>             <C>            <C>
Total net revenue                 $1,316          $2,011          $3,088          $1,494         $1,274
Net income (loss)                     22              35            (754)              9           (702)
Total assets                                       2,579           2,468                          1,833
Debt                                               1,546           1,863                          1,929


</TABLE>


     On July 14, 1999, one of Senior  Housing's  private  company  tenants,  The
Frontier  Group,  filed for  reorganization  under Chapter 11 of the  Bankruptcy
Code.  Frontier leases three nursing homes from Senior Housing for total rent of
$2.1 million per year. Sun Healthcare is also obligated under this lease.  Based
upon the six months ended June 30, 1999 information available to Senior Housing,
one of these nursing homes produced  operating income in excess of its allocated
rent, one facility produced  operating income equal to 92% of its allocated rent
and one facility with occupancy of only 69% had operating losses. Senior Housing
is  preparing  to  collect  its  rent,  including  arrearages  of  approximately
$534,000,  from Frontier or Sun and, if necessary,  to operate these  properties
for its own account until these properties are leased to a substitute tenant.


                                       46
<PAGE>




                              SENIOR HOUSING LEASES

     The following  table presents  information  about Senior  Housing's  leases
(dollars in thousands except guarantee information):

<TABLE>
<CAPTION>
                                                                Integrated      Integrated                    Private
                    Marriott      Brookdale      Mariner        Lease No. 1     Lease No. 2      Genesis      Companies     Total
                    --------      ---------      -------        -----------     -----------      -------      ---------     -----

<S>                <C>             <C>           <C>             <C>             <C>              <C>           <C>         <C>
Number of             14              4             26              31              11               1             6           93
properties

Number of           3,950            829           3,482           2,450          1,825             150           885        13,571
beds/units

Located in no.        7               4              6               7              5                1             4           26
of states


Historical         $325,521       $101,850        $86,486         $66,253        $151,452         $13,007       $25,462    $770,031
investment


Tenant            Subsidiaries   Subsidiary of   Subsidiaries   Subsidiaries    Subsidiaries     Subsidiary    Four private    Nine
                  of Marriott    Brookdale       of Mariner     of Integrated   of Integrated    of Genesis    companies     tenants

Current annual      $30,894        $11,074         $16,716        $8,826          $18,085          $1,444       $3,489       $90,528
rent

Rent increase     4.5% of        10% of          CPI based      CPI based       3% of            $13 per       Various
formula           increase in    increases       increases      increases       increases in     annum
                  gross          in gross                                       gross revenues   increase
                  revenues       revenues                                       starting in
                                 starting in                                    2000
                                 1999

Current lease        2013           2019           2013           2010           2006              2005       2001, 2003,  2001-2019
expiration                                                                                                    2005

Renewal options   All or none;   All or none;    All or none;   All or none;    All or none;     All or none;  Various
                  4 for 5        2 for 25        2 for 10       2 for 13        2 for 10         2 for 10
                  years each     years each      years each     years each      years each       years each
                                                                                                 and 1 for 5
                                                                                                 years

Cross default        Yes            Yes             Yes            Yes             Yes             N/A           N/A
provision

Subordinated         Yes            Yes             Yes            Yes             Yes             Yes           Yes
management fee

Guarantees        Public         Public          Public         Public          Public           A multi-      Various
                  company        company         company        company         company          property      affiliates of
                  parent has     parent has      parent has     parent has      parent has       parent        the private
                  guaranteed     guaranteed      guaranteed     guaranteed      guaranteed       company of    company
                  the lease.     the lease.      the lease.     the lease.      the lease.       the tenant    tenants have
                                                 In addition,                                    has           provided
                                                 there is a                                      guaranteed    guarantees.
                                                 $15 million                                     the lease.    In addition,
                                                 security                                        In addition,  Sun
                                                 deposit and a                                   there is a    Healthcare is
                                                 pledge of                                       $235,000      obligated on
                                                 other assets.                                   security      four of these
                                                                                                 deposit.      leases.

</TABLE>

                                                           47
<PAGE>

Lease Terms

     All of Senior  Housing's  leases are so called  "triple  net" leases  which
require the tenants to maintain  Senior  Housing's  properties  during the lease
terms  and to  indemnify  it for  liability  which  may  arise by  reason of its
ownership of the  properties.  The  following is a summary of material  terms of
Senior  Housing's  leases in  addition  to the terms set forth in the  foregoing
chart. Senior Housing's material leases have been filed with the SEC as exhibits
to its  registration  statement on Form S-11 of which this prospectus is a part.
If you want  more  information  about  these  leases  you  should  review  these
documents.

     Cross Default.  Whenever  Senior Housing leases more than one property to a
single  tenant  or a group of  affiliated  tenants  all those  leases  are cross
defaulted. There are two lease combinations with Integrated. The obligations for
all of the properties under each of the lease  combinations are subject to cross
default,  but the two lease  combinations  are  themselves  not subject to cross
default. Integrated has guaranteed both lease combinations.

     All or None Renewal  Options.  Whenever Senior Housing leases more than one
property to a single  tenant or a group of  affiliated  tenants,  lease  renewal
options may only be exercised on an all or none basis.  This means that a tenant
or group of affiliated  tenants  cannot decide to exercise  renewal  options for
strong  performing  properties  unless it also  renews  the leases for all other
leased  properties.  The two  Integrated  lease  combinations  may be separately
renewed for all properties in each combination of leases.

     Maintenance and Alterations.  All of Senior Housing's  tenants are required
to maintain,  at their expense,  the leased properties in good order and repair,
including  structural  and  nonstructural  maintenance.  Except  in the  case of
properties leased to Marriott,  capital  alterations and additions to any leased
property which exceed a threshold amount of aggregate cost may only be made with
Senior  Housing's prior consent.  Any  alterations or  improvements  made to any
leased property during the terms of the leases become Senior Housing's property,
subject to Senior Housing's  obligation to pay to the tenants  unamortized costs
at lease  termination.  At the end of the leases,  Senior Housing's  tenants are
required  to  surrender  their  leased  properties  in  substantially  the  same
condition  as existed on the  commencement  dates of the leases,  subject to any
permitted alterations and subject to ordinary wear and tear.

     Assignment.   Senior  Housing's  consent  is  generally  required  for  any
assignment  or sublease of its  properties.  In the event of a  subletting,  the
initial  tenant  remains  liable  under the lease and all  guarantees  and other
security remain in place.

     Environmental  Matters.  Senior  Housing's  tenants are required,  at their
expense,  to  remove  and  dispose  of any  hazardous  substance  at the  leased
properties in compliance with all applicable  environmental laws and regulations
and to pay any costs  Senior  Housing  incurs in  connection  with  removal  and
disposal.  Each tenant has indemnified Senior Housing for any claims asserted as
a result of the  presence of  hazardous  substances  at any  property and from a
violation  or  alleged   violation  of  any  applicable   environmental  law  or
regulation.

     Indemnification  and Insurance.  Each tenant has agreed to indemnify Senior
Housing from all claims arising from Senior Housing's  ownership or their use of
its  properties.  Each  tenant  is  required  to  maintain  insurance  on Senior
Housing's properties covering:

     o    comprehensive  general  liability  for  damage to  property  or bodily
          injury arising out of the ownership,  use, occupancy or maintenance of
          the properties;

     o    commercial  property "all risk" liability for damage to  improvements,
          merchandise,  trade  fixtures,  furnishings,  equipment  and  personal
          property;

     o    workers' compensation liability;

     o    business interruption loss;

                                       48

<PAGE>


     o    in some cases, medical malpractice; and

     o    other losses customarily insured by businesses similar to the business
          conducted at Senior Housing's properties.

The leases require that Senior  Housing be named as an additional  insured under
these policies.

     Damage,  Destruction or Condemnation.  In the event any of Senior Housing's
properties is damaged by fire,  or other  casualty or is taken for a public use,
Senior  Housing  receives all  insurance or taking  proceeds and its tenants are
required to pay any difference between the amount of proceeds and the historical
investment by Senior Housing or HRPT in the affected  property.  In the event of
material destruction or condemnation,  some tenants have a right to purchase the
affected  property  for  amounts at least  equal to Senior  Housing's  or HRPT's
historical investment in the property.

     Events of Default.  Events of default under Senior Housing's leases include
the following:

     o    the failure of the tenant to pay rent when due;

     o    the  failure  of  the  tenant  to  perform  key  terms,  covenants  or
          conditions  of its lease and the  continuance  thereof for a specified
          period after written notice;

     o    the occurrence of events of insolvency with respect to the tenant;

     o    the failure of the tenant to maintain required insurance coverages; or

     o    the  revocation  of any material  license  necessary  for the tenant's
          operation of Senior Housing's property.

     Remedies.  Upon the occurrence of any event of default, Senior Housing may:

     o    terminate the affected lease and accelerate the rent;

     o    terminate  the  tenant's  rights to the affected  property,  relet the
          property and recover from the tenant the difference between the amount
          of rent which would have been due under the  applicable  lease and the
          rent received under the reletting; and

     o    make any payment or perform any act  required to be  performed  by the
          tenant under its lease.

The defaulting  tenant is obligated to reimburse Senior Housing for all payments
made and all costs and expenses  incurred in connection with any exercise of the
foregoing remedies.

     Ground Lease Terms. The land underlying two of Senior Housing's  properties
is leased.  Senior  Housing's  leases require its tenants to pay and perform all
obligations arising under these ground leases.  These ground leases terminate on
2086 and 2079.  The annual rents payable under the ground leases in 1998 totaled
$138,100.  If Senior Housing's  tenants fail to pay the applicable  ground rent,
Senior  Housing  may have to do so in order to protect its  investment  in these
properties.

                                       49
<PAGE>

            SENIOR HOUSING SELECTED HISTORICAL FINANCIAL INFORMATION


     The following table presents selected historical financial  information and
other data for the properties  owned by Senior Housing.  This financial data has
been derived from HRPT's  historical  financial  statements  for the years ended
December  31,  1994  through  1998,  and  the  unaudited   historical  financial
statements  for the six-month  periods  ended June 30, 1998 and 1999.  Per share
data has not been  presented  because  Senior  Housing  was not a publicly  held
company during the periods  presented.  Senior Housing is currently a 100% owned
subsidiary of HRPT,  and none of its  properties  are  encumbered  by debt.  The
following  table includes pro rata  allocations of interest  expense and general
and  administrative  expenses for historical  periods.  In the opinion of Senior
Housing's  management,  the methods used for allocating interest and general and
administrative  expenses are reasonable.  However,  it is impossible to estimate
all operating costs that Senior Housing would have incurred as a separate public
company.  Accordingly,  the net income and funds from  operations  shown are not
necessarily indicative of results that Senior Housing will realize as a separate
company.  Additionally,  year to  year  comparisons  are  impacted  by  property
acquisitions  during the historical  periods.  For more  information  see Senior
Housing  Properties Trust's  Consolidated  Historical  Financial  Statements and
notes thereto appearing on pages F-14 to F-21.


<TABLE>
<CAPTION>

                                                                             (000s except property data)
                                                                                                               Six Months Ended
                                                               Year Ended December 31,                             June 30,
                                     -------------------------------------------------------------------   -------------------------
                                             1994         1995        1996          1997         1998        1998          1999
                                            ------       ------      ------        ======       ------       ------         ----
                                         (unaudited)   (unaudited)                                         (unaudited)   (unaudited)
<S>                                       <C>          <C>          <C>          <C>          <C>          <C>          <C>
Operating Data:
  Revenues:
   Rental income                           $  46,429    $  62,586    $  66,202    $  78,463    $  82,542    $  40,324    $  42,409
   Interest and other income                   1,554        4,018        4,240        5,708        5,764        2,886        2,881
                                           ---------    ---------    ---------    ---------    ---------    ---------    ---------

      Total  revenues                         47,983       66,604       70,442       84,171       88,306       43,210       45,290
                                           ---------    ---------    ---------    ---------    ---------    ---------    ---------
                                                                                                                            66,604

  Expenses:
   Interest                                    5,430       16,937       14,719       16,958       19,293        9,263        9,992
   Depreciation                                9,711       14,748       15,383       17,826       18,297        9,102       11,207
   General and administrative                  2,691        3,857        3,899        4,664        4,480        2,174        2,259
                                           ---------    ---------    ---------    ---------    ---------    ---------    ---------

      Total expenses                          17,832       35,542       34,001       39,448       42,070       20,539       23,458
                                           ---------    ---------    ---------    ---------    ---------    ---------    ---------

  Net income                               $  30,151    $  31,062    $  36,441    $  44,723    $  46,236    $  22,671    $  21,832
                                           =========    =========    =========    =========    =========    =========    =========

  Net income
Other Data:
   Number of properties at end of period          68           76           83           88           93           88           93
   Cash flows from operating activities    $  44,150    $  48,331    $  51,308    $  91,094    $  60,236    $  31,975    $  32,808
   Cash flows from investing activities     (319,704)     (39,301)    (105,566)     (19,663)         306          135          188
   Cash flows from financing activities      275,554       (9,030)      54,258      (71,431)     (60,403)     (32,110)     (32,967)
   Funds from operations                      39,862       45,810       51,824       62,549       64,533       31,773       33,039

<CAPTION>

                                                                 As of December 31,                              As of June 30,
                                       ----------------------------------------------------------------   ------------------------
                                           1994           1995          1996         1997        1998         1998         1999
                                          ------         ------        ------       ======      ======       ------       ------
Balance Sheet Data:                    (unaudited)    (unaudited)   (unaudited)                           (unaudited)   (unaudited)
<S>                                       <C>          <C>          <C>          <C>          <C>          <C>          <C>
   Total real estate investments (before
     depreciation)                         $579,633     $624,738     $730,304     $759,121     $770,219     $758,986     $770,031
   Total assets (after depreciation)        556,668      587,701      679,201      692,586      686,296      682,682      674,294

   ------------
<FN>
(1) Funds from  operations  or "FFO," as defined in the white  paper on funds from  operations  which was  approved  by the Board of
Governors of NAREIT in March 1995, is net income computed in accordance  with GAAP,  before gains or losses from sales of properties
and extraordinary items, plus depreciation and amortization and after adjustment for unconsolidated partnerships and joint ventures.
Senior Housing  considers FFO to be an appropriate  measure of performance  for an equity REIT,  along with cash flow from operating
activities,  financing  activities and investing  activities,  because it provides  investors with an indication of an equity REIT's
ability to incur and service debt, make capital  expenditures,  pay distributions and fund other cash needs. Senior Housing computes
FFO in accordance  with the standards  established  by NAREIT which may not be comparable to FFO reported by other REITs that do not
define the term in accordance with the current NAREIT  definition or that interpret the current NAREIT definition  differently.  FFO
does not represent cash generated by operating  activities in accordance with GAAP and should not be considered as an alternative to
net income,  determined  in  accordance  with GAAP,  as an  indication  of  financial  performance  or the cash flow from  operating
activities, determined in accordance with GAAP, as a measure of liquidity.
</FN>
</TABLE>
                                                                 50
<PAGE>
      SENIOR HOUSING SELECTED PRO FORMA CONSOLIDATED FINANCIAL INFORMATION


   The following  table presents  selected pro forma  financial  information for
Senior  Housing for the year ended  December 31, 1998,  and the six months ended
June 30, 1999, to reflect the effects of the spin-off.  For more information see
the Unaudited Pro Forma Consolidated Financial Statements appearing on pages F-8
through F-13.


                                           Year Ended            Six Months
                                          December 31,         Ended June 30,
                                              1998                 1999
                                          ------------         -------------
                                          (unaudited)           (unaudited)
          Operating Data:                      (000s except per share data)
          Revenues:
               Rental income                $84,003               $42,409
               Interest and other income      5,764                 2,881
                                            -------               -------
                   Total revenues            89,767                45,290
                                            -------               -------
          Expenses:
               Interest                      14,563                 7,281
               Depreciation                  18,490                11,207
               General and administrative     4,523                 2,259
                                            -------               -------
                   Total expenses            37,576                20,747
                                            -------               -------
          Net income                        $52,191               $24,543
                                            =======               =======
          Earnings per share                $  2.01               $  0.94
                                            =======               =======


                                                                   As of
                                                               June 30, 1999
                                                               -------------
                                                                 (unaudited)
                                                                   (000s)
Balance Sheet Data:
Total real estate investments (before depreciation)              $770,031
Total assets (after depreciation)                                 690,719
Bank credit facility                                              200,000



                   SENIOR HOUSING MANAGEMENT'S DISCUSSION AND
            ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS


     The following  discussion presents an analysis of the results of operations
of the properties owned by Senior Housing for the years ended December 31, 1996,
1997 and 1998,  the six month periods ended June 30, 1998 and 1999,  and the pro
forma results of operations  of Senior  Housing for the year ended  December 31,
1998,  and  the six  months  ended  June  30,  1999.  This  discussion  includes
references to funds from operations. Funds from operations, or "FFO," as defined
in the white paper on funds from  operations  which was approved by the Board of
Governors of NAREIT in March 1995,  is net income  computed in  accordance  with
GAAP, before gains or losses from sales of properties and  extraordinary  items,
plus  depreciation  and  amortization  and after  adjustment for  unconsolidated
partnerships  and  joint  ventures.  Senior  Housing  considers  FFO  to  be  an
appropriate measure of performance for an equity REIT, along with cash flow from
operating activities,  financing activities and investing activities, because it
provides  investors  with an indication of an equity REIT's ability to incur and
service debt, make capital  expenditures,  pay distributions and fund other cash
needs. Senior Housing computes FFO in accordance with the standards  established
by NAREIT which may not be comparable to FFO reported by other REITs that do not
define  the  term in  accordance  with the  current  NAREIT  definition  or that
interpret the current NAREIT definition differently. FFO does not represent cash
generated  by operating  activities  in  accordance  with GAAP and should not be
considered as an alternative to net income,  determined in accordance with GAAP,
as an  indication  of  financial  performance  or the cash flow  from  operating
activities, determined in accordance with GAAP, as a measure of liquidity.

                                       51
<PAGE>

Pro Forma Results of Operations


     Six Months Ended June 30, 1999. For the pro forma six months ended June 30,
1999, giving effect to the spin-off and the related transactions, revenues would
have been $45.3  million,  total  expenses would have been $20.7 million and net
income would have been $24.5 million or $0.94 per share.  Compared to historical
results total expenses and interest expense decreased by $2.7 million.  Interest
expense  decreased due to lower  interest  expense from pro forma  borrowings of
$200  million  under  Senior  Housing's  bank  credit  facility  compared to the
allocated portion of historical allocated interest expense incurred by HRPT.

     On a pro forma  basis for the six months  ended June 30,  1999,  funds from
operations  would  have  been  $35.8  million.  The  pro  forma  average  shares
outstanding would have been 26 million.

     Year Ended  December  31, 1998.  For the pro forma year ended  December 31,
1998, giving effect to the spin-off and the related transactions, revenues would
have been $89.8  million,  total  expenses would have been $37.6 million and net
income would have been $52.2 million or $2.01 per share.  Compared to historical
results, total revenue increased by $1.5 million and total expenses decreased by
$4.5 million.  Revenue  increased due to rent generated from the  acquisition of
five properties in 1998. Total expenses  decreased  primarily because of reduced
interest  expense  of $4.7  million.  Interest  expense  decreased  due to lower
interest  expense  from  pro  forma  borrowings  of $200  million  under  Senior
Housing's bank credit facility compared to allocated historical interest expense
incurred by HRPT.

     On a pro forma  basis for the year  ended  December  31,  1998,  funds from
operations  would  have  been  $70.7  million.  The  pro  forma  average  shares
outstanding would have been 26 million.


Historical Results of Operations


     Six Months Ended June 30, 1999,  compared to 1998. For the six months ended
June 30, 1999,  compared to the six months ended June 30, 1998,  total  revenues
increased  by $2.1  million,  total  expenses  increased by $2.9 million and net
income  decreased by $839,000.  Total  revenues  increased due to rent generated
from the  acquisition  of five  properties  subsequent  to June 30, 1998.  Total
expenses increased  primarily because of higher depreciation of $2.1 million due
to property  acquisitions and higher  allocated  interest expense as a result of
increased borrowings by HRPT. Net income was $21.8 million and $22.7 million for
the six months ended June 30, 1999 and 1998, respectively.  There were no shares
outstanding  during  these  periods.  On pro  forma 26  million  average  shares
outstanding  net  income  per share  would have been $0.84 and $0.87 for the six
months ended June 30, 1999 and 1998, respectively.

     Funds from  operations  increased  by $1.3 million for the six months ended
June 30, 1999,  compared to the prior period due to income from five  properties
acquired subsequent to June 30, 1998.

     Year Ended December 31, 1998, compared to 1997. For the year ended December
31, 1998, compared to the year ended December 31, 1997, total revenues increased
by $4.1  million,  total  expenses  increased  by $2.6  million  and net  income
increased by $1.5 million.  Total revenues  increased due to rent generated from
the acquisition of five  properties  during 1998 and the full year impact of the
rent  generated  from five  properties  acquired  during  1997.  Total  expenses
increased  primarily  because  of  higher  allocated  interest  expense  of $2.3
million,  which resulted from increased borrowings by HRPT. Net income was $46.2
million  and  $44.7  million  for the year  ended  December  31,  1998 and 1997,
respectively.  There were no shares  outstanding  during these  periods.  On pro
forma 26 million average shares outstanding net income per share would have been
$1.78 and $1.72 for the year ended December 31, 1998 and 1997, respectively.

     Funds from operations increased by $2.0 million for the year ended December
31,  1998,  compared  to the prior  period  due to income  from five  properties
acquired  during 1998 and the full year  impact of income  from five  properties
acquired during 1997.

                                       52
<PAGE>


     Year Ended December 31, 1997, compared to 1996. For the year ended December
31, 1997, compared to the year ended December 31, 1996, total revenues increased
by $13.7  million,  total  expenses  increased  by $5.4  million  and net income
increased by $8.3 million.  Total revenues  increased due to rent generated from
the acquisition of five  properties  during 1997 and the full year impact of the
rent  generated  from seven  properties  acquired  during 1996.  Total  expenses
increased  primarily  because  of  higher  allocated  interest  expense  of $2.2
million,   which  resulted  from  increased   borrowings  by  HRPT,  and  higher
depreciation  expense of $2.4 million due to property  acquisitions.  Net income
was $44.7  million and $36.4  million for the year ended  December  31, 1997 and
1996,  respectively.  There were no shares outstanding during these periods.  On
pro forma 26 million average shares  outstanding net income per share would have
been  $1.72  and  $1.40  for  the  year  ended   December  31,  1997  and  1996,
respectively.

     Funds  from  operations  increased  by $10.7  million  for the  year  ended
December  31,  1997,  compared  to the prior  period due to the income  from the
acquisition  of five  properties  during 1997 and the full year impact of income
from seven properties acquired during 1996.


Liquidity and Capital Resources


     At June 30, 1999,  Senior Housing had cash and cash equivalents of $168,000
and prior to the spin-off  Senior  Housing will receive $16.4 million from HRPT.
For the six months  ended  June 30,  1999 and 1998,  cash  flows from  operating
activities were $32.8 million and $32.0 million,  respectively,  cash flows from
investing activities were $188,000 and $135,000, respectively, and cash used for
financing activities was $33.0 million and $32.1 million,  respectively.  Senior
Housing  expects the cash  transferred to it and future cash flow from operating
activities  will be  sufficient  to meet its short  term and long  term  working
capital requirements  including its first distribution of $15.6 million or $0.60
per share for the quarter ending on September 30, 1999,  which it expects to pay
during the fourth quarter of 1999.

     For the twelve months  subsequent to the spin-off,  Senior Housing  expects
that cash flows from operating  activities and the availability of amounts under
its bank credit facility will be sufficient to meet its short term and long term
liquidity requirements for operations, working capital and distributions.

     Senior  Housing has accepted a commitment  for a $350 million,  three-year,
interest only bank credit facility. This bank credit facility will be secured by
first mortgages on 18 of Senior Housing's properties.  The interest rate will be
LIBOR plus 1.75% per annum.  The bank  credit  facility  will be  available  for
acquisitions,  working capital and for general business purposes. Senior Housing
will have the  ability  to repay  and  redraw  amounts  under  this bank  credit
facility  until its  maturity in 2002.  Senior  Housing's  bank credit  facility
documentation  will have customary  representations,  warranties,  covenants and
event of default provisions.  The material restrictive  financial covenants will
require Senior Housing to:

     o    limit debt to no more than 60% of total capital, as defined;

     o    maintain a ratio of net income plus interest  expense and depreciation
          to interest expense of at least 1.5; and

     o    maintain a tangible net worth, as defined, of $350 million, subject to
          increases based on equity issuances.

     After the spin-off  Senior Housing will borrow $200 million under this bank
credit  facility to pay the  formation  debt to HRPT and will have $150  million
available for acquisitions, working capital and general business purposes.


     Total assets  decreased by $12.0 million from $686.3 million as of December
31, 1998, to $674.3  million as of June 30, 1999.  The decrease is primarily due
to depreciation on real estate properties.

                                       53
<PAGE>

     After completion of the spin-off,  in both the short term and the long term
Senior Housing intends to acquire  additional senior housing  properties.  These
purchases  will  be  initially  funded  with  excess  working  capital,  if any,
generated  by Senior  Housing and proceeds of  borrowings  under the bank credit
facility.  After properties are acquired, bank credit facility borrowings may be
repaid with long term debt or equity capital.  After completion of the spin-off,
Senior Housing expects to have: $200 million of debt outstanding; book equity of
$447.4  million;  and total real estate  assets,  at  historical  cost,  of $770
million.  In these  circumstances,  Senior  Housing  believes  that it will have
sufficient access to capital markets to meet its growth objectives and refinance
its debt as needed.  Of course,  however,  access to growth  capital will depend
upon numerous facts,  including some beyond Senior Housing's control; and Senior
Housing  can  provide  no  assurance  that it will be able to  raise  additional
capital in sufficient  amounts,  or at appropriate  costs,  to fund growth or to
repay debt in both the short term and the long term.


     Inflation.  Inflation  might have both  positive and negative  impacts upon
Senior Housing's  business.  Inflation might cause the value of Senior Housing's
real estate investments to increase.  Similarly, in an inflationary environment,
the percentage  rents which Senior Housing  receives based upon CPI increases or
as a percentage of its tenants'  revenues should increase and rent yields Senior
Housing could charge for new investments would likely increase. Offsetting these
benefits,  inflation  might cause the costs  Senior  Housing pays for equity and
debt capital to increase.  To mitigate the adverse impact of increased  costs of
debt  capital in the event of material  inflation  Senior  Housing may  purchase
interest rate cap contracts whenever it has a large amount of floating rate debt
outstanding  and it believes  material  interest  rate  increases  are likely to
occur.  On balance,  Senior  Housing does not believe that the modest  inflation
which it expects  may occur in the U.S.  economy  during the next few years will
have any material effect on its business.

     Deflation.  Deflation  would have business  consequences  to Senior Housing
which are the  inverse of the impact of  inflation.  If new  construction  costs
decline,  the value of Senior  Housing's  existing real estate  investments  may
decline.  The value of Senior  Housing's  long term  minimum  rent leases  might
increase but some tenants might have trouble  paying Senior  Housing's rent in a
deflationary environment, and the amounts of its percentage rent increases might
decline or  disappear.  Deflation  might lower  Senior  Housing's  costs of debt
capital; however,  deflation's impact on Senior Housing's cost of equity capital
is uncertain. Senior Housing does not believe that the U.S. economy is likely to
experience serious deflation in the foreseeable future.  Senior Housing believes
that  modest  deflation  would  have no effect  upon its  business  and  serious
deflation would have a negative effect upon its business.

Year 2000


     The  in-house  computer  systems  are  limited  to  software  and  hardware
developed  by third  parties and  installed,  operated  and  monitored by Senior
Housing's  investment  advisor,  Reit Management.  All of the computer  systems,
which are limited to information  systems,  were  installed  within the last two
years. All of the critical  enterprise wide systems are warrantied in writing to
be year  2000  compliant  by the  manufacturers  and have  been  tested  by Reit
Management.  These systems include the network  hardware,  the network operating
system, the desktop operating system,  business application software,  financial
accounting software and communication software. Other than those operated by its
tenants,  Senior Housing has no critical non information technology systems, and
no such systems are provided to it by Reit Management. All costs associated with
Senior Housing's computer systems are borne by Reit Management.

     All of Senior Housing's properties are leased on a triple net basis and are
not managed by Senior Housing.  Ninety-seven percent of Senior Housing's tenants
are operated by public  companies which have filed reports  containing year 2000
preparedness information with the SEC. The leases require the tenants to conduct
the  daily   operations  of  the  properties  and  the  scope  of  the  tenants'
responsibility  includes ensuring preparedness for the year 2000. Because of its
leases,  the only  actions  that  Senior  Housing  can take with  respect to its
properties  are to inquire of its tenants,  monitor its tenants' SEC filings and
evaluate their year 2000 preparedness plans for all systems, including financial
and  nonfinancial  systems such as elevators,  heating and  ventilation and life
safety  systems.  Six of the nine Senior  Housing  tenants  that  operate 97% of
Senior  Housing's  investments  have  responded  in writing to Senior  Housing's
inquiries  regarding  their  preparedness  for issues  related to the year

                                       54
<PAGE>

2000.  Based on these  responses  and tenant  public  disclosures  which  Senior
Housing  has  reviewed,  Senior  Housing  believes  that its  tenants are in the
process of studying their systems and the systems for their  vendors,  suppliers
and  service  providers  to ensure  preparedness  but none of  Senior  Housing's
tenants  has yet  reported  they are year  2000  compliant.  Current  levels  of
preparedness are varied and include partially completed inventory and assessment
of  potential  risks,  testing,  implementation  of plans  for  remediation  and
reprogramming.  While Senior  Housing  believes  that the efforts of its tenants
described in their  responses  and in their  public  filings will be adequate to
address year 2000 concerns, there can be no guarantee that all tenant operations
and those of their vendors and payors,  including federal and state Medicare and
Medicaid  systems,  will be year 2000  compliant  on a timely basis and will not
have a material effect on Senior Housing.


     If Senior Housing's  efforts and the efforts of its vendors,  customers and
tenants,  and their  customers  and  vendors to  prepare  for the year 2000 were
ineffective,  the operation of Senior  Housing's  properties could be subject to
significant adverse effects, including, but not limited to, loss of business and
growth opportunities,  reduced revenues and increased expenses which might cause
operating losses to its tenants.  Continued or severe operating losses may cause
one or more of Senior  Housing's  tenants to default on their  leases.  Numerous
lease  defaults  could  jeopardize  Senior  Housing's  ability to  maintain  its
financial  results of  operations,  meet its  financial,  operating  and capital
obligations and timely pay its distributions to shareholders.

     In particular, the worst case scenario which Senior Housing can envision at
this time is that  some of its  tenants  may be  unable to pay their  rents on a
timely  basis  because  some of  their  payment  sources,  such as  Medicare  or
Medicaid,  are delayed. In these circumstances,  Senior Housing may be unable to
meet its debt obligations or to timely pay distributions.


     Senior Housing does not currently  have a contingency  plan in place in the
event it, or its tenants, do not successfully remedy year 2000 compliance issues
that are identified in a timely manner or fail to identify any year 2000 issues.
Senior Housing will evaluate the status of its year 2000  compliance plan during
the  fourth  quarter  of  1999  and  determine  whether  a  contingency  plan is
necessary.


Quantitative and Qualitative Disclosures About Market Risk


     Senior  Housing is exposed to market  changes in  interest  rates.  Because
interest on all its outstanding debt is at a floating rate,  changes in interest
rates  will not  affect  the value of  outstanding  debt  instruments.  However,
changes in interest rates will affect Senior Housing's  operating  results.  For
example,  the interest rate payable on Senior  Housing's  pro forma  outstanding
indebtedness of $200 million at June 30, 1999,  would have been 7% per annum. An
immediate 10% change in that interest  rate, or 70 basis points,  would increase
or decrease Senior Housing's costs by $1.4 million,  or over $0.05 per share per
year:



<TABLE>
<CAPTION>


                                Impact of Changes in Interest Rates
                                             (in 000s)

                    Interest Rate Per Year    Outstanding Debt     Total Interest Expense Per Year
                    ----------------------    ----------------     -------------------------------
<S>     <C>                  <C>                  <C>                          <C>
At June 30:                  7.0%                 $200,000                     $14,000
10% Reduction:               6.3%                  200,000                      12,600
10% Increase:                7.7%                  200,000                      15,400


</TABLE>


The foregoing table presents a so called "shock" analysis which assumes that the
interest rate change by 10%, or 70 basis points,  is in effect for a whole year.
If interest  rates were to change  gradually  over one year the impact  would be
less.

     Senior Housing  borrows in U.S.  dollars and all of its current  borrowings
are subject to interest at LIBOR plus a premium. Accordingly,  Senior Housing is
vulnerable to changes in U.S. dollar based short term rates, specifically LIBOR.

                                       55
<PAGE>

     During the past few months short term U.S. dollar based interest rates have
tended to rise, increasing by about 50 basis points. Senior Housing is unable to
predict the direction or amount of interest  rate changes  during the next year.
Senior  Housing has decided not to purchase an interest  rate cap or other hedge
to protect  against future rate  increases,  but it may enter such agreements in
the future. Also, it may incur additional debt at floating or fixed rates, which
would increase its exposure to market changes in interest rates.

     Senior Housing currently owns mortgage receivables with a carrying value of
$37.6 million.  When  comparable term market interest rates decline the value of
these receivables increases; when comparable term market interest rates rise the
value of those  receivables  declines.  Using  discounted  cash flow analyses at
weighted average estimated per year market rates for December 31, 1998, and June
30, 1999, of 10% and 10.75%,  respectively,  the estimated fair values of Senior
Housing's pro forma mortgage receivables were as follows:


                                    Carrying Value
                                     of Mortgage                Estimated
       Valuation Date                Receivables                Fair Value
       --------------                -----------                ----------

                                                   (in 000s)

December 31, 1998                      $37,826                   $40,525

June 30, 1999                           37,638                    38,522


     An  immediate  10%  change in the  market  rate of  interest,  or 108 basis
points, applicable to Senior Housing mortgage receivables at June 30,1999, would
affect the fair value of those receivables as follows:


                                           Carrying Value
                       Interest Rate         of Mortgage            Estimated
                         Per Year            Receivables           Fair Value

                                                         (in 000s)


Estimated                  10.75%               $37,638               $38,522
market:

10% reduction:              9.67%                37,638                41,123

10% increase:              11.83%                37,638                36,161


If the market rate changes  occurred  gradually  over time,  the effect of these
changes  would  be  realized   gradually.   Because  Senior  Housing's  mortgage
receivables  are fixed rate  instruments,  changes in market interest rates will
have no effect on Senior Housing's  operating  results unless these  receivables
are sold. At this time Senior Housing expects to hold its existing  mortgages to
their maturity and not to realize any profit or loss from trading these mortgage
receivables.  Also,  Senior  Housing  does not  presently  expect to expand  its
mortgage investments.

     The interest rate changes which affect the  valuations of Senior  Housing's
mortgages are U.S. dollar long term rates for corporate obligations of companies
with ratings similar to Senior Housing's mortgagors.


                                       56
<PAGE>

                            SENIOR HOUSING MANAGEMENT

Senior Housing Trustees and Executive Officers

      Senior Housing has two categories of trustees:  (1) managing  trustees who
are employees of Reit  Management  and involved in Senior  Housing's  day-to-day
activities;  and  (2)  independent  trustees  who  are  not  employees  of  Reit
Management and not involved in Senior Housing's  day-to-day  activities.  Senior
Housing's  bylaws  require  that a  majority  of  its  trustees  be  independent
trustees.  Also,  although it is not required by Senior Housing's  bylaws, it is
Senior Housing's policy that the same person may not simultaneously  serve as an
independent  trustee of both  Senior  Housing and HRPT so long as HRPT owns more
than 10% of the shares of Senior  Housing.  The  bylaws  and this  policy do not
prohibit former trustees,  officers,  employees or persons otherwise  affiliated
with HRPT or Reit  Management  from  serving as  independent  trustees of Senior
Housing.

      After completion of the spin-off,  Senior Housing's trustees and executive
officers will be as follows:
<TABLE>
<CAPTION>

Name                                    Age      Position
- ----                                    ---      --------
<S>                                     <C>    <C>


Barry M. Portnoy...................      54      Managing Trustee (term will expire in 2000)

Gerard M. Martin...................      64      Managing Trustee (term will expire in 2001)
Bruce M. Gans, M.D. ...............      52      Independent Trustee (term will expire in 2000)
Arthur G. Koumantzelis.............      68      Independent Trustee (term will expire in 2002)
Vacancy............................              Independent Trustee (term will expire in 2001)
David J. Hegarty...................      42      President, Chief Operating Officer and Secretary
Ajay Saini.........................      39      Treasurer and Chief Financial Officer
</TABLE>

     Barry M. Portnoy has been a managing  trustee of both HRPT and  Hospitality
Properties since their organization in 1986 and 1995, respectively.  Mr. Portnoy
is also a  Director  and 50%  owner of Reit  Management.  Mr.  Portnoy  has been
actively  involved  in real  estate and real  estate  finance  activities  as an
attorney,  investor and manager for over 20 years.  Mr. Portnoy was a partner in
the law firm of  Sullivan  &  Worcester  LLP,  Boston,  Massachusetts  from 1978
through March 31, 1997, and he served as Chairman of that firm from 1994 through
March 1997.

     Gerard M. Martin has been a managing  trustee of both HRPT and  Hospitality
Properties since their organization in 1986 and 1995,  respectively.  Mr. Martin
is also a Director and 50% owner of Reit Management.  Mr. Martin has been active
in the real  estate and senior  housing  industries  as a  developer,  owner and
manager for  approximately  30 years.  During the past five years,  Mr. Martin's
principal  employment  has been as a managing  trustee  of HRPT and  Hospitality
Properties.

     Bruce M. Gans,  M.D. has been Senior Vice  President for  Continuing  Care,
Chairman  of Physical  Medicine  and  Rehabilitation  at North Shore Long Island
Jewish Health System and Professor of Physical  Medicine and  Rehabilitation  at
the Albert  Einstein  College of Medicine since April 1999.  Prior to April 1999
Dr. Gans was a Professor and Chairman of the Department of Physical Medicine and
Rehabilitation  at Wayne State  University  and a Senior Vice  President  of the
Detroit  Medical  Center  since 1989.  Dr. Gans has been a trustee of HRPT since
1995. Upon  completion of the spin-off,  Dr. Gans will resign from HRPT and will
become one of Senior Housing's independent trustees.

     Arthur G.  Koumantzelis  has been President and Chief Executive  Officer of
Gainesborough  Investments LLC, a private investment  company,  since June 1998.
From  1990 to 1998,  Mr.  Koumantzelis  was  Senior  Vice  President  and  Chief
Financial  Officer of Cumberland  Farms,  Inc., a private company engaged in the
convenience  store business and in the distribution and retail sale of gasoline.
Mr. Koumantzelis has been a trustee of Hospitality  Properties since its initial
public  offering  in 1995,  and was a trustee of HRPT from 1992  through  August
1995.  Upon  completion of the  spin-off,  Mr.  Koumantzelis  will become one of
Senior Housing's independent trustees.

                                       57
<PAGE>

     Vacancy.  Following the completion of the spin-off,  Senior Housing intends
to elect another independent  trustee. At this time, no person has been selected
to fill this position.


     David J. Hegarty is the President, Chief Operating Officer and Secretary of
Senior  Housing.  Mr.  Hegarty is also,  and has been since 1994, the President,
Chief Operating  Officer and Secretary of HRPT. Upon completion of the spin-off,
Mr.  Hegarty  will  resign  from HRPT.  Mr.  Hegarty is also a Director  and the
President and Secretary of Reit  Management and will continue in these positions
after the  spin-off.  Mr.  Hegarty has served HRPT,  Reit  Management  and their
affiliates  in various  capacities  since  1987,  prior to which he was an audit
manager with Ernst & Young LLP. Mr. Hegarty is a certified public accountant.

     Ajay Saini is the Treasurer and Chief Financial  Officer of Senior Housing.
Mr. Saini is also,  and has been since 1994,  the Treasurer and Chief  Financial
Officer of HRPT.  Upon  completion of the  spin-off,  Mr. Saini will resign from
HRPT. Mr. Saini is also a Vice President of Reit Management and will continue in
this position after the spin-off. Mr. Saini has served HRPT, Reit Management and
their  affiliates in various  capacities  since June 1990, prior to which he was
employed by Ernst & Young LLP. Mr. Saini is a certified public accountant.


Committees of the Board of Trustees

     Promptly following  completion of the spin-off,  the board of trustees will
establish an audit  committee  that will consist of  independent  trustees.  The
audit  committee  will  make   recommendations   concerning  the  engagement  of
independent  public  accountants,  review  the  plans and  results  of the audit
engagement,  approve  professional  services provided by the independent  public
accountants,  consider the appropriateness of audit and nonaudit fees charged by
Senior  Housing's  accountants  and  review  the  adequacy  of Senior  Housing's
internal accounting controls.

     The entire board of trustees will function as a  compensation  committee to
implement Senior Housing's incentive share award plan described below.

Compensation of the Trustees and Officers

     Senior Housing will pay its independent  trustees an annual fee of $20,000,
plus a fee of $500 for each  meeting  attended.  Each  independent  trustee will
automatically  receive an annual grant of 500 common shares after the completion
of the spin-off,  or upon initial  election to fill the current vacant position,
and at the first meeting of the board of trustees  following each annual meeting
of  shareholders,  commencing in 2000. In addition,  Senior Housing will pay the
independent  trustee serving as chairman of the audit committee $2,000 per year.
This position is expected to rotate  annually  among the  independent  trustees.
Senior  Housing will also  reimburse  expenses  its trustees  incur in attending
meetings.  Senior Housing's managing trustees and officers are employees of Reit
Management and they will not receive compensation  directly from Senior Housing,
except reimbursement of expenses and under the incentive share award plan.

Incentive Share Award Plan


     Senior  Housing has adopted an incentive  share award plan and has reserved
1.3  million  shares  to  grant  to  its  independent  trustees,   officers  and
consultants,  including  employees of Reit  Management,  but not Reit Management
itself which will be paid under its contract described below. Senior Housing has
established  the  incentive  share  award  plan to ensure  that its  independent
trustees,  officers  and others  responsible  for its  operations  have  similar
interests with  shareholders.  In addition,  the incentive share award plan will
permit Senior Housing to compensate  affiliates for the  performance of services
and duties in addition to those compensated by Reit Management.

     As discussed above,  the independent  trustees will  automatically  receive
grants of 500 common  shares per year as part of their annual  compensation.  In
granting other incentive share awards, the board of trustees intends to consider
a range of factors regarding  potential  grantees,  including the complexity and
duration of
                                       58

<PAGE>

tasks  performed and the amount and terms of common shares  previously  granted.
The vesting  schedule of each  incentive  share award will be  determined at the
time of grant.  No awards will be granted under the  incentive  share award plan
before completion of the spin-off,  and no individuals have yet been selected to
receive any awards.


Limitation of Liability and Indemnification


     Under  Senior  Housing's  declaration  of trust and bylaws,  its  trustees,
officers  and  employees  are  entitled  to  indemnification.  You can find more
information  about  indemnification  of trustees,  officers and employees in the
section  entitled  "Material  Provisions of Maryland Law and of Senior Housing's
Declaration of Trust and Bylaws" on page 67 of this prospectus.


Reit Management and the Advisory Agreement

     Reit Management.  Reit Management is a Delaware  corporation owned by Barry
M. Portnoy and Gerard M. Martin.  Its principal  place of business is 400 Centre
Street, Newton,  Massachusetts and its telephone number is (617) 928-1300.  Reit
Management has  approximately  180 full time employees  including a headquarters
staff, four regional offices and other personnel  located  throughout the United
States.  Reit  Management  also  acts as the  investment  advisor  to  HRPT  and
Hospitality Properties.


     The directors of Reit Management are Barry M. Portnoy, Gerard M. Martin and
David J.  Hegarty.  The  officers  of Reit  Management  are  David  J.  Hegarty,
President and  Secretary,  John G. Murray,  Executive  Vice  President,  John A.
Mannix,  Vice President,  Thomas M. O'Brien,  Vice President,  Ajay Saini,  Vice
President,  David M. Lepore, Vice President,  Jennifer B. Clark, Vice President,
and John  Popeo,  Treasurer.  A  biographical  summary of the  officers  of Reit
Management  who are not described  above under  "--Senior  Housing  Trustees and
Executive  Officers" or under  "Information  about HRPT After the Spin-off--HRPT
Management" on page 26 of this prospectus follows:


     John G. Murray, age 38, is the Executive Vice President of Reit Management.
Mr.  Murray  also is and has been the  President,  Chief  Operating  Officer and
Secretary of Hospitality Properties since 1996. Mr. Murray has served in various
capacities for HRPT, Reit Management and their  affiliates  since 1993. Prior to
1993,  Mr.  Murray was  Director of Finance,  Business  Analysis and Planning at
Fidelity Brokerage Services, Inc. from 1992 to 1993 and Director of Acquisitions
from 1990 through 1991.  Prior to 1990, Mr. Murray was employed by Ernst & Young
LLP. Mr. Murray is a certified public accountant.

     Thomas  M.  O'Brien,  age 33,  is and  has  been a Vice  President  of Reit
Management  since 1996. Mr. O'Brien is and also has been the Treasurer and Chief
Financial  Officer of  Hospitality  Properties  since 1996.  Prior to 1996,  Mr.
O'Brien was employed by Arthur  Andersen LLP for eight years.  Mr.  O'Brien is a
certified public accountant.

     Jennifer B. Clark,  age 38, is a Vice  President  of Reit  Management.  Ms.
Clark joined Reit Management in July 1999 and will be primarily  responsible for
leasing HRPT's office  buildings.  From 1994 to July 1999, Ms. Clark's principal
employment was as a partner  specializing  in real estate law at the law firm of
Sullivan  &  Worcester  LLP,  counsel  to Reit  Management  and its  affiliates,
including HRPT, Hospitality Properties and Senior Housing.


     The Advisory  Agreement.  The  following  is a summary of Senior  Housing's
advisory  agreement  with  Reit  Management.  Although  it is a  summary  of the
material terms, it does not contain all the information that may be important to
you. If you would like more  information,  you should read the entire agreement,
which has been filed with the SEC as an exhibit to the registration statement of
which this prospectus is a part.


     Reit  Management  is  required  to use its best  efforts to present  Senior
Housing with a continuing and suitable investment program consistent with Senior
Housing's  investment  policies.  Subject to its duty of overall  management and
supervision,  the board of trustees has delegated to Reit  Management  the power
and duty to:

                                       59
<PAGE>

     o    provide  research and economic and statistical data in connection with
          Senior Housing's investments and recommend changes in Senior Housing's
          investment policies when appropriate;

     o    investigate  and  evaluate   investment,   financing  and  refinancing
          opportunities and make recommendations concerning specific investments
          to the trustees;

     o    manage  Senior   Housing's   short-term   investments   including  the
          acquisition and sale of money market instruments;

     o    administer  Senior  Housing's  day-to-day   operations  including  the
          leasing of Senior  Housing's  properties  and  relations  with  Senior
          Housing's tenants;

     o    investigate,  negotiate and enter contracts for the purchase, lease or
          servicing of real estate and related  interests,  on Senior  Housing's
          behalf in furtherance of Senior Housing's investment objectives;

     o    investigate,  negotiate  and enter  contracts  for the  financing  and
          refinancing of investments,  on Senior Housing's behalf in furtherance
          of the financing objectives of Senior Housing;

     o    act as  attorney-in-fact or agent in acquiring and disposing of Senior
          Housing's real estate  investments,  and in handling,  prosecuting and
          settling any of Senior Housing's claims;

     o    monitor Senior Housing's real property and other  investments as would
          be done by a prudent owner;

     o    monitor all third-party  services  provided to Senior Housing as would
          be done by a prudent owner;

     o    administer the day-to-day  bookkeeping and accounting functions as are
          required for the management of Senior Housing's  assets,  contract for
          audits and  prepare or cause to be  prepared  reports  required by any
          governmental  authority  in  connection  with the  conduct  of  Senior
          Housing's business;

     o    provide  office space,  office  equipment and the use of accounting or
          computing equipment when required;

     o    provide  personnel  necessary  for the  performance  of the  foregoing
          services; and

     o    upon request by the trustees,  make reports of its  performance of the
          foregoing services.

     In performing its services under the advisory  agreement,  Reit  Management
may use facilities, personnel and support services of various of its affiliates.

     Under the advisory  agreement,  Reit Management  assumes no  responsibility
other than to render  the  services  described  therein in good faith and is not
responsible  for any action of the Senior Housing board of trustees in following
or  declining  to follow any advice or  recommendation  of Reit  Management.  In
addition,   Senior  Housing  has  agreed  to  indemnify  Reit  Management,   its
shareholders,  directors, officers, employees and affiliates against liabilities
relating to acts or omissions of Reit Management  undertaken on Senior Housing's
behalf in good faith.

     The initial  term of the advisory  agreement  expires on December 31, 1999.
Renewals or extensions of the advisory agreement will be subject to the periodic
approval  of  a  majority  of  the  independent  trustees.  Under  the  advisory
agreement,  Reit  Management  and Messrs.  Portnoy and Martin have agreed not to
provide  advisory  services  to, or serve as a director or officer of, any other
REIT which is  principally  engaged in the business of owning and leasing senior
apartments,  congregate communities,  assisted living or nursing home properties
or to make competitive direct investments in these types of properties,  in each
case, without the consent of Senior Housing's independent trustees.

                                       60

<PAGE>

     Compensation  to Reit  Management.  The  board  of  trustees,  acting  by a
majority  vote  of the  independent  trustees,  will  determine  the  amount  of
compensation paid to Reit Management when it determines whether to renew, extend
or amend the advisory  agreement,  based on factors it deems appropriate.  These
factors are expected to include:

     o    the size of the  advisory  fee in relation  to the size,  composition,
          quality and profitability of Senior Housing's investments;

     o    the success of Reit Management in generating  opportunities  that meet
          Senior Housing's investment objectives;

     o    the  quality  and  extent of  services  and advice  furnished  by Reit
          Management;

     o    the rates charged by others performing comparable services; and

     o    the costs of similar services incurred by other REITs.

     The advisory agreement currently provides for an annual advisory fee and an
annual  incentive  fee.  The  advisory  fee is payable  monthly  and  reconciled
annually. The advisory fee is equal to the sum of 0.5% of the historical cost of
the assets  transferred to Senior Housing by HRPT, plus 0.7% of Senior Housing's
real  estate  investments  up to an  additional  $250  million  made  after  the
completion  of  the  spin-off,   plus  0.5%  of  Senior  Housing's  real  estate
investments exceeding these amounts. The annual incentive fee is equal to 15% of
the annual  increase in Senior  Housing's  funds from operations per share times
the weighted  average  number of shares  outstanding  on a diluted basis in each
year;  provided  however,  the annual  incentive fee shall be no more than $0.02
times the weighted  average number of shares.  The annual incentive fees payable
to Reit Management will be paid in Senior  Housing's  shares at market value. No
incentive fees will be payable for 1999.


     The advisory  agreements  currently in effect  between Reit  Management and
HRPT and between Reit  Management and Hospitality  Properties are  substantially
similar to the advisory  agreement  between Reit  Management and Senior Housing.
Upon completion of the spin-off,  Reit  Management's  contract with HRPT will be
amended to make clear that HRPT's  historical cost of real estate assets used to
calculate  the advisory fees payable by HRPT will exclude  HRPT's  investment in
Senior Housing.  Accordingly,  the advisory fees paid by HRPT will decline by an
amount equal to the fees payable by Senior  Housing,  and the total fees payable
to Reit Management will be unchanged as a result of the spin-off.


     Senior  Housing is not  expected to have any  employees  or  administrative
officers  separate  from Reit  Management.  Services  which might  otherwise  be
provided by  employees  will be provided to Senior  Housing by employees of Reit
Management.  Similarly,  office space will be provided to Senior Housing by Reit
Management.  Although Senior Housing does not expect to have significant general
and  administrative  operating  expenses  in  addition  to fees  payable to Reit
Management,  Senior  Housing  will be required to pay  various  other  expenses,
including  the costs and expenses of  acquiring,  owning and disposing of Senior
Housing's real estate  interests.  These costs and expenses include  acquisition
and  disposition  diligence,  audit and legal fees, the costs of borrowing money
and the costs of securities  listing,  transfer,  registration,  compliance with
public reporting requirements and shareholder  communications  generally.  Also,
Senior Housing will pay the fees of its independent trustees.

Related Party Transactions

     Senior  Housing  is  currently  a 100%  owned  subsidiary  of HRPT.  Senior
Housing's  managing  trustees,  Barry M. Portnoy and Gerard M. Martin,  also own
Reit  Management,  and act as managing  trustees  of HRPT.  As a result of these
relationships,  HRPT and Messrs.  Portnoy and Martin have material  interests in
transactions with Senior Housing, including the following:

                                       61
<PAGE>

     o    Senior  Housing  is  indebted  to HRPT for  $200  million.  After  the
          spin-off Senior Housing will borrow $200 million under its bank credit
          facility and pay this $200 million formation debt to HRPT.


     o    Upon  completion of the spin-off,  Reit  Management will become Senior
          Housing's  investment  advisor.  Assuming the spin-off is completed on
          September  30, 1999,  the pro forma  advisory fee that Senior  Housing
          will  pay to Reit  Management  from  the  completion  of the  spin-off
          through the initial term of the  agreement on December 31, 1999,  will
          be approximately $1.0 million, or $3.9 million on an annualized basis.
          HRPT's  advisory fees to Reit  Management  will be reduced by the same
          amount.


     o    After the  spin-off,  HRPT will retain 12.8 million of Senior  Housing
          shares. By retaining these shares, HRPT will be able to participate in
          Senior   Housing's   future   success   through    distributions   and
          appreciation, if any, in the price of these shares.

     o    Three of the  eleven  properties  included  in the  Integrated  Health
          Services  Lease No. 2 are  leased by a  corporation  owned by  Messrs.
          Portnoy  and  Martin.   Integrated   manages  these  properties  under
          contracts  which expire in 2006 and are  renewable  thereafter.  Under
          these management  arrangements,  Integrated is financially responsible
          for the operation of these three  properties  and has  guaranteed  the
          lease obligations due to Senior Housing.  Integrated's obligations for
          these leases are subject to cross default and cross  collateralization
          with other lease and  mortgage  obligations  of  Integrated  to Senior
          Housing  included in  Integrated's  Lease No. 2.  Messrs.  Portnoy and
          Martin have not received,  and do not expect to receive,  net economic
          benefits from their ownership of this tenant entity,  and they are not
          obligated for these leases to Senior Housing. The arrangement by which
          an entity  owned by Messrs.  Portnoy  and  Martin  became a tenant for
          these three  properties was established in 1994 in order to facilitate
          licensing for a predecessor of Integrated.

                                LEGAL PROCEEDINGS

     Senior Housing has a limited operating history and is not currently a party
to any legal  proceedings.  Senior  Housing is not aware of any  material  legal
proceeding affecting its properties for which it might become liable.  Moreover,
HRPT has agreed to indemnify Senior Housing for any pending litigation affecting
the properties transferred to Senior Housing.


                             SENIOR HOUSING POLICIES

     The following  discussion sets forth Senior  Housing's  policies  regarding
investments,   dispositions,   financings,   conflicts  of  interest  and  other
activities.  The board of trustees has set these  policies and although there is
no current  intention  to do so, the board of trustees may amend or revise these
policies at any time without a vote of shareholders.

Investment Policies

     Acquisitions.  Senior Housing intends to buy additional senior  apartments,
congregate  communities,  assisted  living  properties and nursing homes.  It is
Senior  Housing's  policy to acquire assets primarily for income and secondarily
for their appreciation potential. In making future acquisitions,  Senior Housing
will consider a range of factors including:

     o    the acquisition price of the proposed property;

     o    the estimated replacement cost of the proposed property;

     o    proposed lease terms;

                                       62
<PAGE>

     o    the  financial  strength  and  operating  reputation  of the  proposed
          tenant;

     o    historical and projected cash flows of the property to be acquired;

     o    the  location  and  competitive  market  environment  of the  proposed
          property;

     o    the physical  condition of the proposed property and its potential for
          redevelopment or expansion; and

     o    the price segment and payment  sources in which the proposed  property
          is operated.

     Senior  Housing  intends  to acquire  properties  which  will  enhance  the
diversity of its portfolio in respect to tenants, types of services provided and
locations.   Senior  Housing  has  no  policies  which  specifically  limit  the
percentage of its assets which may be invested in any  individual  property,  in
any one  type  of  property,  in  properties  leased  to any  one  tenant  or in
properties leased to an affiliated group of tenants.

     Other  Investments  in Real  Estate.  Senior  Housing  expects to emphasize
direct wholly owned  investments in fee interests.  However,  circumstances  may
arise  in which  Senior  Housing  may  invest  in  leaseholds,  joint  ventures,
mortgages  and other real estate  interests.  Senior  Housing may invest in real
estate joint  ventures if it concludes  that by doing so it may benefit from the
participation   of  co-venturers  or  that  Senior   Housing's   opportunity  to
participate  in the  investment  is  contingent  on the use of a  joint  venture
structure.  Senior  Housing may invest in  participating,  convertible  or other
types of mortgages if it concludes that by doing so it may benefit from the cash
flow or  appreciation  in the value of a  property  which is not  available  for
purchase.

Disposition Policies

     From time to time Senior  Housing may  consider  the sale of one or more of
its properties.  Future disposition  decisions,  if any, will be made based on a
number of factors including the following:

     o    the proposed sale price;

     o    the strategic  fit of the property  with the rest of Senior  Housing's
          portfolio;

     o    potential  opportunities  to  increase  revenues by  reinvesting  sale
          proceeds;

     o    the  potential  for,  or  the  existence  of,  any   environmental  or
          regulatory problems affecting a particular property;

     o    Senior Housing's alternative capital needs; and

     o    the maintenance of Senior Housing's  qualification as a REIT under the
          Internal Revenue Code.

     Integrated  holds purchase options on four of the nursing homes included in
the  Integrated  Lease No. 2.  Under the  options,  Integrated  has the right to
purchase one of these  properties  per year  commencing  in February  2000.  The
purchase  option prices for these  properties are  approximately  equal to their
historical  costs.  It is presently  unknown if  Integrated  intends to purchase
these properties.

Financing Policies

     Senior Housing has accepted a commitment for a bank credit  facility.  This
bank credit  facility will enable  Senior  Housing to borrow up to $350 million.
The facility will require payment of interest only at LIBOR plus a premium.  The
maturity  of this  facility  will be in three  years  ending in late  2002.  Two
hundred million  dollars will be borrowed under this facility  shortly after the
spin-off and used to pay Senior  Housing  formation debt to HRPT. The balance of
$150 million under this  facility will be available to Senior  Housing after the
spin-off to fund new acquisitions and for general business  purposes.  This bank
credit  facility  will be  secured

                                       63
<PAGE>

by first  mortgages  upon,  and a  collateral  assignment  of  leases  from,  18
properties  owned by Senior  Housing.  This bank  credit  facility  has  several
covenants  typically found in revolving loan facilities  including  covenants to
maintain a minimum net worth and  minimum  collateral  value and which  prohibit
Senior Housing from  incurring debt in excess of 60% of its total capital.  This
bank credit facility is expected to be fully  documented  before the spin-off is
completed.  A copy of the commitment  letter evidencing the terms of this credit
facility  has been filed as an exhibit to the  registration  statement  of which
this  prospectus  is part.  If you want more  information  concerning  this bank
credit facility you should refer to that filing.

     Senior  Housing  intends to use this bank  credit  facility  to fund future
acquisitions  and for working capital.  Periodically,  Senior Housing expects to
repay amounts  drawn under the bank credit  facility with proceeds of equity and
long term debt offerings. Senior Housing's organizational documents do not limit
the amount of  indebtedness  it may incur.  At present Senior Housing expects to
maintain a capital  structure in which Senior Housing's debt will not exceed 60%
of its total capital. Senior Housing will consider future equity offerings when,
in its judgment,  doing so will improve its capital structure without materially
adversely  affecting  the market value of its shares.  During the next few years
Senior Housing expects to lower its target maximum debt to capitalization  ratio
to 50% and to achieve an investment grade rating for its debt  obligations;  but
it does not expect this to happen until it has operated as an independent public
company for several years. Until it achieves an investment grade rating,  Senior
Housing  expects  that the least  costly debt  capital  available  to it will be
secured  debt and that most of its debt will be secured.  In the future,  Senior
Housing  may modify its  current  financing  policies  in light of then  current
economic  conditions,  relative  costs of debt and equity  capital,  acquisition
opportunities and other factors; and its intended ratio of debt to total capital
may change.

Conflict of Interest Policies

     Senior  Housing has adopted  several  policies  to  mitigate  existing  and
potential conflicts of interest, as follows:
<TABLE>
<CAPTION>
Conflict                                                        Policy
- --------                                                        ------
<S>                                                             <C>


Reit Management is also the investment advisor for               Mr.  Hegarty,  HRPT's current  President and Chief
HRPT  and  Hospitality  Properties  and has  other               Operating Officer,  and Mr. Saini,  HRPT's current
business  interests.  Messrs.  Portnoy  and Martin               Martin  have   agreed  not  to  provide   advisory
will be managing trustees of Senior Housing,  HRPT               services  Treasurer  and Chief  Financial  Officer
and Hospitality Properties and have other business               will resign from HRPT and assume similar positions
interests.  Messrs.  Hegarty  and  Saini  will  be               at Senior Housing.  They will devote approximately
officers of Senior  Housing  and Reit  Management.               75% of their  business  time to Senior or serve as
Conflicts  arise in the  allocation  of management               Housing.  Reit Management and Messrs.  Portnoy and
time.                                                            trustees  or  officers  of any other REIT which is
                                                                 principally  engaged in owning and leasing  senior
                                                                 apartments,   congregate   communities,   assisted
                                                                 living  properties  or nursing  homes,  or to make
                                                                 competitive  direct  investments in these types of
                                                                 properties,  in each case,  without the consent of
                                                                 Senior Housing's independent trustees.



                                                         64
<PAGE>
<CAPTION>
Conflict                                                        Policy
- --------                                                        ------
<S>                                                             <C>


Messrs.   Portnoy  and  Martin  own,  and  Messrs.               The continuation of the advisory agreement and the
Hegarty   and  Saini   are   employed   by,   Reit               fees payable to Reit Management will be subject to
Management.  The fees  paid by Senior  Housing  to               periodic  review and approval by Senior  Housing's
Reit Management are based in part upon the size of               independent  trustees.  The incentive fees payable
Senior  Housing's  investment   portfolio.   These               to Reit Management will be based upon increases in
circumstances  might provide an economic incentive               FFO per share and will be paid in shares of Senior
for Reit Management and Messrs.  Portnoy,  Martin,               Housing.
Hegarty and Saini to  encourage  Senior  Housing's
investments to raise fees.


After the  spin-off,  HRPT  will own 12.8  million               HRPT does not intend to purchase additional shares
shares, 49%, of Senior Housing's shares. This will               of Senior  Housing.  Over time, as Senior  Housing
afford  HRPT  considerable  influence  over Senior               issues shares to fund its growth, HRPT's ownership
Housing shareholder actions. Sales of these shares               percentage will decline. So long as HRPT owns over
by HRPT could  depress the market  price of Senior               10% of Senior Housing's  shares, no one will serve
Housing's shares.                                                simultaneously  as an independent  trustee of both
                                                                 Senior  Housing  and HRPT.  HRPT has agreed to not
                                                                 sell  its  Senior  Housing  shares  for  one  year
                                                                 following  the  spin-off  without  the  consent of
                                                                 Senior Housing's independent trustees.

Mr. Portnoy,  one of the Senior Housing's managing               Mr. Portnoy will not  participate in the review or
trustees, was a partner and chairman of Sullivan &               approval of any fees payable by Senior  Housing to
Worcester,  LLP,  Senior  Housing's  counsel.  Mr.               Sullivan & Worcester, LLP.
Portnoy  retired  from  that firm in 1997 and will
receive  payments from that firm for the next five
years in respect of his retirement.


Other conflicts may develop from time to time.                   A majority of Senior  Housing's  board of trustees
                                                                 will consist of  independent  trustees who are not
                                                                 employees  of  Reit  Management  and  who  do  not
                                                                 participate  in  its  day to  day  activities.  No
                                                                 trustee or officer will  participate  in decisions
                                                                 made by  Senior  Housing  in which he or she has a
                                                                 material adverse interest.  It is Senior Housing's
                                                                 policy that  officers and trustees  will  disclose
                                                                 their adverse  interests to the board of trustees,
                                                                 and the  board of  trustees,  acting  without  the
                                                                 participation  of any trustee  holding the adverse
                                                                 interest,   will  determine  whether  the  adverse
                                                                 interest is material.  Reit Management and all the
                                                                 trustees  and  officers  of  Senior   Housing  are
                                                                 required by  applicable  laws to act in accordance
                                                                 with their  fiduciary  responsibilities  to Senior
                                                                 Housing,  and it is Senior  Housing's  policy that
                                                                 those laws be followed.

</TABLE>
                                                         65
<PAGE>


Policies with Respect to Other Activities

     Senior  Housing  expects to operate in a manner that will not subject it to
regulation  under the  Investment  Company Act of 1940.  Except for the possible
acquisition  of other  REITs  which are  engaged in similar  businesses,  Senior
Housing does not currently intend to invest in the securities of other companies
for the  purpose  of  exercising  control,  to  underwrite  securities  of other
companies or to trade actively in loans or other investments.

     Senior  Housing may make  investments  other than as previously  described,
although it does not currently  intend to do so. Senior Housing has authority to
repurchase or otherwise  reacquire its shares or other  securities it issues and
may do so in the future. In the future, Senior Housing may issue shares or other
securities in exchange for property.  Also, although it has no current intention
to do so, Senior  Housing may make loans to third  parties,  including to Senior
Housing's trustees and officers and to joint ventures in which it participates.


                                       66

<PAGE>

                   MATERIAL PROVISIONS OF MARYLAND LAW AND OF
                SENIOR HOUSING'S DECLARATION OF TRUST AND BYLAWS

     Senior  Housing is  organized  as a  perpetual  life  Maryland  real estate
investment trust. The following is a summary of Senior Housing's  declaration of
trust and  bylaws  and  several  provisions  of  Maryland  law.  Because it is a
summary,  it does not contain all the information  that may be important to you.
If  you  want  more  information,   you  should  read  Senior  Housing's  entire
declaration  of  trust  and  bylaws,   copies  of  which  are  exhibits  to  the
registration  statement  of  which  this  prospectus  is a part or  refer to the
provisions of Maryland law.

Trustees

     Senior Housing's  declaration and bylaws provide that the board of trustees
will establish the number of trustees. There may not be less than three nor more
than seven  trustees.  In the event of a vacancy,  a majority  of the  remaining
trustees  will fill the  vacancy,  except that a majority of the entire board of
trustees  must  fill a  vacancy  resulting  from an  increase  in the  number of
trustees.  Senior  Housing's bylaws require that a majority of its trustees will
be independent trustees except for temporary periods due to vacancies.

     Senior  Housing's  declaration  of trust divides the board of trustees into
three  classes.  The initial  term of the first  class will expire in 2000;  the
initial  term of the second  class will expire in 2001;  and the initial term of
the third class will expire in 2002. Beginning in 2000,  shareholders will elect
trustees of each class for three-year terms upon the expiration of their current
terms.  Shareholders  will elect only one class of  trustees  each year.  Senior
Housing  believes  that  classification  of the board  will  help to assure  the
continuity of Senior Housing's business  strategies and policies.  There will be
no cumulative voting in the election of trustees.  Consequently,  at each annual
meeting of  shareholders,  the holders of a majority of Senior  Housing's shares
will be able to elect all of the successors of the class of trustees whose terms
expire at that meeting.

     The  classified  board  provision  could  have the  effect  of  making  the
replacement of incumbent  trustees more time  consuming and difficult.  At least
two annual  meetings  of  shareholders  will  generally  be required to effect a
change in a majority of the board of trustees.

     The  declaration  of trust  provides  that a trustee may be removed with or
without  cause by the  affirmative  vote of at least  two-thirds  of the  shares
entitled  to be cast in the  election  of  trustees.  This  provision  precludes
shareholders  from  removing   incumbent  trustees  unless  they  can  obtain  a
substantial affirmative vote of shares.

Advance Notice of Trustee Nominations and New Business

     Senior Housing's bylaws provide that nominations of persons for election to
the board of trustees and proposals for business to be considered at shareholder
meetings  may be made only in Senior  Housing's  notice of the  meeting,  by the
board of trustees,  or by a  shareholder  who is entitled to vote at the meeting
and has complied with the advance notice procedures set forth in the bylaws.

     Under Senior Housing's  bylaws,  a shareholder's  notice of nominations for
trustee or other  matters to be  considered  at a  shareholders  meeting must be
delivered to Senior Housing's secretary at Senior Housing's principal office not
later than the close of business on the 90th day and not earlier  than the 120th
day prior to the first  anniversary of the preceding  year's annual meeting.  In
the event that the date of the annual  meeting is  advanced by more than 30 days
or delayed by more than 60 days from the anniversary  date, or if Senior Housing
has not  previously  held an annual  meeting,  a  shareholder's  notice  must be
delivered not later than the later of 90 days prior to the annual meeting or the
10th  day  following  the day on  which  Senior  Housing  first  makes a  public
announcement  of the date of the  meeting.  Any  notice  from a  shareholder  of
nominations  for  trustee or other  matters to be  considered  at a  shareholder
meeting must contain the following:

     o    as to each person nominated for election as a trustee, all information
          relating  to  the  person  that  is  required  to  be   disclosed   in
          solicitations  of  proxies  for  election  of  trustees  or  otherwise
          required by

                                       67
<PAGE>

          Regulation  14A under the  Securities  Exchange Act of 1934,  together
          with  the  nominee's  written  consent  to being  named  in the  proxy
          statement as a nominee and to serving as a trustee if elected;

     o    as to other business that the shareholder proposes to bring before the
          meeting,  a  brief  description  of  the  business,  the  reasons  for
          conducting  the business and any material  interest in the business of
          the shareholder  and of the beneficial  owner, if any, on whose behalf
          the proposal is made; and

     o    as to the shareholder  giving the notice and the beneficial  owner, if
          any, on whose behalf the  nomination or proposal is made, the name and
          address  of the  shareholder  and  beneficial  owner and the number of
          Senior  Housing's  shares which (s)he or they own  beneficially and of
          record.

Meetings of Shareholders

     Under  Senior  Housing's   bylaws,   Senior  Housing's  annual  meeting  of
shareholders  will take place on the second Thursday of May of each year, unless
a different date is set by the board of trustees.  All meetings of  shareholders
may be called only by the board of trustees.

Liability and Indemnification of Trustees and Officers

     To  the  maximum  extent   permitted  by  Maryland  law,  Senior  Housing's
declaration  of trust and bylaws  include  provisions  limiting the liability of
Senior  Housing's  present and former  trustees,  officers and  shareholders for
damages and  obligating  Senior  Housing to indemnify  them against any claim or
liability to which they may become  subject by reason of their status or actions
as present or former Senior Housing trustees,  officers or shareholders.  Senior
Housing's bylaws also obligate it to pay or reimburse the people described above
for reasonable expenses in advance of final disposition of a proceeding.

     Maryland  law  permits a real  estate  investment  trust to  indemnify  and
advance  expenses to its  trustees,  officers,  employees and agents to the same
extent  permitted by the Maryland  General  Corporation  Law for  directors  and
officers of Maryland  corporations.  The Maryland  corporation statute permits a
corporation to indemnify its present and former  directors and officers  against
judgments,  penalties,  fines,  settlements and reasonable  expenses incurred in
connection  with any  proceeding  to which they may be made a party by reason of
their  service  in those  capacities.  However,  a Maryland  corporation  is not
permitted  to  provide  this  type  of   indemnification  if  the  following  is
established:

     o    the act or  omission of the  director  or officer was  material to the
          matter giving rise to the proceeding and was committed in bad faith or
          was the result of active and deliberate dishonesty;

     o    the director or officer actually received an improper personal benefit
          in money, property or services; or

     o    in the case of any  criminal  proceeding,  the director or officer had
          reasonable cause to believe that the act or omission was unlawful.

The Maryland  corporation  statute  permits a corporation to advance  reasonable
expenses  to a  director  or  officer  upon  the  corporation's  receipt  of the
following:

     o    a written  affirmation  by the  director  or officer of his good faith
          belief  that  he  has  met  the  standard  of  conduct  necessary  for
          indemnification by the corporation; and

     o    a written undertaking by him or on his behalf to repay the amount paid
          or reimbursed by the  corporation if it is ultimately  determined that
          this standard of conduct was not met.

     The SEC  has  expressed  the  opinion  that  indemnification  of  trustees,
officers or persons  otherwise  controlling  a company for  liabilities  arising
under the  Securities  Act of 1933 is against  public  policy  and is  therefore
unenforceable.

                                       68

<PAGE>

Shareholder Liability

     Under the Maryland REIT statute, a shareholder is not personally liable for
the  obligations  of a real estate  investment  trust  solely as a result of his
status as a shareholder.  Senior Housing's declaration of trust provides that no
shareholder will be liable for any debt, claim,  demand,  judgment or obligation
of any kind of,  against or with respect to, Senior Housing by reason of being a
shareholder.  Despite these facts, Senior Housing's legal counsel has advised it
that in some  jurisdictions the possibility  exists that shareholders of a trust
entity such as Senior  Housing may be held liable for acts or obligations of the
trust. While Senior Housing intends to conduct its business in a manner designed
to minimize potential shareholder  liability,  it can give no assurance that you
can avoid  liability in all  instances in all  jurisdictions.  Senior  Housing's
trustees  do not  intend to provide  insurance  covering  these  risks to Senior
Housing's shareholders.

Maryland Asset Requirements


     To maintain  Senior  Housing's  qualification  as a real estate  investment
trust,  the  Maryland  REIT statute  requires  that at least 75% of the value of
Senior   Housing's  assets  be  real  estate,   mortgages  or   mortgage-related
securities,  government  securities,  cash and cash equivalent items,  including
short-term securities and receivables.  The Maryland REIT statute also prohibits
Senior   Housing  from  using  or  applying  land  for  farming,   agricultural,
horticultural or similar purposes. These provisions of the Maryland REIT statute
have been repealed effective October 1, 1999.


Transactions with Affiliates

     Senior Housing's declaration of trust allows it to enter into contracts and
transactions  of any kind with any  person,  including  any of Senior  Housing's
trustees,  officers,  employees  or agents or any person  affiliated  with them.
Other than general legal  principles  applicable to self-dealing by fiduciaries,
there are no prohibitions in Senior Housing's  declaration or bylaws which would
prohibit dealings between Senior Housing and its affiliates.

Voting by Shareholders

     Whenever  shareholders  are  required or  permitted to take any action by a
vote,  the action may only be taken by a vote at a shareholders  meeting.  Under
Senior  Housing's  declaration and bylaws  shareholders do not have the right to
take any action by written consents instead of a vote.

Restrictions on Transfer of Shares

     Senior  Housing's  declaration of trust restricts the amount of shares that
individual  shareholders may own. These restrictions are intended to assist with
REIT compliance  under the Internal Revenue Code and otherwise to promote Senior
Housing's  orderly  governance.  These  restrictions  do not apply to HRPT, Reit
Management or their  affiliates.  All  certificates  evidencing  Senior  Housing
shares will bear a legend referring to these restrictions.

     Senior  Housing's  declaration of trust provides that no person may own, or
be deemed to own by virtue of the attribution provisions of the Internal Revenue
Code,  more than 9.8% of the  number  or value of Senior  Housing's  outstanding
shares. Senior Housing's declaration also prohibits any person from beneficially
or constructively owning shares if that ownership would result in Senior Housing
being  closely held under Section  856(h) of the Internal  Revenue Code or would
otherwise cause it to fail to qualify as a REIT.

     Senior  Housing's  board  of  trustees,  in its  discretion,  may  exempt a
proposed transferee from the share ownership limitation. So long as the board of
trustees determines that it is in Senior Housing's best interest to qualify as a
REIT,  the board may not grant an  exemption  if the  exemption  would result in
Senior Housing failing to qualify as a REIT. In determining  whether to grant an
exemption,  the  board of  trustees  may  consider,  among  other  factors,  the
following:

                                       69
<PAGE>


     o    the general reputation and moral character of the person requesting an
          exemption;

     o    whether the person's ownership of shares would adversely affect Senior
          Housing's ability to acquire additional properties; and

     o    whether  granting an exemption  would  adversely  affect any of Senior
          Housing's existing contractual arrangements or business policies.

In addition, the board of trustees may require rulings from the Internal Revenue
Service,  opinions of counsel,  affidavits,  undertakings or agreements it deems
advisable in order to make the foregoing decisions.

     If a person attempts a transfer of Senior  Housing's shares in violation of
the  ownership  limitations  described  above,  then that number of shares which
would cause the violation will be  automatically  transferred to a trust for the
exclusive benefit of one or more charitable  beneficiaries  designated by Senior
Housing.  The  prohibited  owner will not  acquire  any  rights in these  excess
shares, will not benefit  economically from ownership of any excess shares, will
have no rights to  distributions  and will not possess any rights to vote.  This
automatic transfer will be deemed to be effective as of the close of business on
the business day prior to the date of the violative transfer.

     Within 20 days of receiving notice from Senior Housing that its shares have
been  transferred  to an excess share trust,  the excess share trustee will sell
the shares held in the excess share trust to a person  designated  by the excess
share  trustee  whose  ownership  of the shares will not  violate the  ownership
limitations set forth in Senior Housing's  declaration of trust. Upon this sale,
the interest of the charitable beneficiary in the shares sold will terminate and
the excess  share  trustee will  distribute  the net proceeds of the sale to the
prohibited owner and to the charitable beneficiary as follows:

     o    The prohibited owner will receive the lesser of:

          (1)  the price paid by the prohibited  owner for the shares or, if the
               prohibited  owner did not give value for the shares in connection
               with the event  causing the shares to be held in the excess share
               trust,  e.g., a gift,  devise or other similar  transaction,  the
               market  price of the shares on the day of the event  causing  the
               shares to be transferred to the excess share trust; and

          (2)  the net price  received by the excess share trustee from the sale
               of the shares held in the excess share trust.

     o    Any  net  sale  proceeds  in  excess  of  the  amount  payable  to the
          prohibited owner shall be paid to the charitable beneficiary.

     If, prior to Senior Housing's  discovery that shares of beneficial interest
have been  transferred to the excess share trust, a prohibited owner sells those
shares, then:

          (1)  those  shares  will be  deemed to have been sold on behalf of the
               excess share trust; and

          (2)  to the extent that the  prohibited  owner  received an amount for
               those  shares that exceeds the amount that the  prohibited  owner
               was entitled to receive  from a sale by an excess share  trustee,
               the  prohibited  owner must pay the  excess to the  excess  share
               trustee upon demand.

     Also, shares of beneficial  interest held in the excess share trust will be
offered for sale to Senior Housing, or its designee,  at a price per share equal
to the lesser of:

          (1)  the price  per  share in the  transaction  that  resulted  in the
               transfer to the excess share trust or, in the case of a devise or
               gift, the market price at the time of the devise or gift; and

                                       70
<PAGE>


          (2)  the  market  price on the date  Senior  Housing  or its  designee
               accepts the offer.


Senior  Housing  will have the right to accept the offer until the excess  share
trustee has sold the shares held in the excess share trust.  The net proceeds of
the sale to Senior Housing will be  distributed  similar to any other sale by an
excess share trustee.

     Every  owner of more than 5% of all  classes or series of Senior  Housing's
shares is required to give written notice to Senior Housing within 30 days after
the end of each  taxable  year  stating the name and  address of the owner,  the
number of shares of each class and series of Senior  Housing's  shares which the
owner  beneficially  owns, and a description of the manner in which those shares
are held. If the Internal  Revenue Code or applicable tax regulations  specify a
threshold  below 5%, this notice  provision  will apply to those persons who own
Senior  Housing's  shares of  beneficial  interest at the lower  percentage.  In
addition,  each  shareholder  is required to provide  Senior Housing upon demand
with any additional information that it may request in order to determine Senior
Housing's status as a REIT, to determine  Senior  Housing's  compliance with the
requirements  of any taxing  authority or government and to determine and ensure
compliance with the foregoing share ownership limitations.

     The  restrictions  described  above will not preclude the settlement of any
transaction  entered  into  through  the  facilities  of the  NYSE or any  other
national  securities  exchange or automated  inter-dealer  quotation system. The
declaration of trust provides, however, that the fact that the settlement of any
transaction  occurs  will  not  negate  the  effect  of  any  of  the  foregoing
limitations  and any transferee in this kind of  transaction  will be subject to
all of the provisions and limitations described above.

Business Combinations

     The  Maryland  corporation  statute  contains a provision  which  regulates
business  combinations with interested  shareholders.  This provision applies to
Maryland real estate investment  trusts like Senior Housing.  Under the Maryland
corporation  statute,  business  combinations  such as mergers,  consolidations,
share exchanges and the like between a Maryland real estate investment trust and
an interested  shareholder  are  prohibited for five years after the most recent
date on which the  shareholder  becomes  an  interested  shareholder.  Under the
statute the following persons are deemed to be interested shareholders:

     o    any person who  beneficially  owns 10% or more of the voting  power of
          the trust's shares;

     o    an  affiliate  or  associate  of the trust who, at any time within the
          two-year  period  prior to the date in  question,  was the  beneficial
          owner  of 10% or more of the  voting  power  of the  then  outstanding
          voting shares of the trust; or

     o    an affiliate of an interested shareholder.

     After the five-year  prohibition  period has ended, a business  combination
between a trust and an interested  shareholder  must be recommended by the board
of trustees of the trust and must receive the following shareholder approvals:

     o    the affirmative vote of at least 80% of the votes entitled to be cast;
          and

     o    the affirmative  vote of at least  two-thirds of the votes entitled to
          be cast by holders of shares other than shares held by the  interested
          shareholder  with  whom or  with  whose  affiliate  or  associate  the
          business combination is to be effected.

The second  shareholder  approval is not  required  if the trust's  shareholders
receive  the minimum  price set forth in the  Maryland  corporation  statute for
their  shares and the  consideration  is received in cash or in the same form as
previously paid by the interested shareholder for its shares.

                                       71
<PAGE>

     The foregoing  provisions of the Maryland corporation statute do not apply,
however, to business  combinations that are approved or exempted by the board of
trustees of the trust prior to the time that the interested  shareholder becomes
an  interested  shareholder.  Senior  Housing's  board of trustees has adopted a
resolution  that any business  combination  between Senior Housing and any other
person is exempted  from the  provisions  of the  Maryland  corporation  statute
described in the preceding paragraphs, provided that the business combination is
first approved by the board of trustees, including the approval of a majority of
the members of the board of trustees who are not affiliates or associates of the
acquiring person. This resolution,  however, may be altered or repealed in whole
or in part at any time.

Control Share Acquisitions

     The  Maryland  corporation  statute  contains a provision  which  regulates
control share acquisitions.  This provision also applies to Maryland real estate
investment trusts. The Maryland corporation statute provides that control shares
of  a  Maryland  real  estate  investment  trust  acquired  in a  control  share
acquisition  have no voting rights except to the extent that the  acquisition is
approved by a vote of two-thirds of the votes entitled to be cast on the matter,
excluding shares of beneficial interest owned by the acquiror, by officers or by
trustees who are  employees of the trust.  Control  shares are voting  shares of
beneficial  interest  which,  if aggregated  with all other shares of beneficial
interest  previously  acquired  by the  acquiror,  or in  respect  of which  the
acquiror  is able to  exercise or direct the  exercise  of voting  power,  would
entitle the acquiror to exercise voting power in electing trustees within one of
the following ranges of voting power:

     o    one-fifth or more but less than one-third,

     o    one-third or more but less than a majority, or

     o    a majority or more of all voting power.

An acquiror must obtain the necessary shareholder approval each time he acquires
control  shares in an amount  sufficient  to cross one of the  thresholds  noted
above.

     Control shares do not include shares which the acquiring person is entitled
to vote as a result of having previously obtained shareholder approval by virtue
of a  revocable  proxy.  The  Maryland  corporation  statute  provides a list of
exceptions from the definition of control share acquisition.

     A person who has made or proposes to make a control share acquisition, upon
satisfaction  of  the  conditions  set  forth  in  the  statute,   including  an
undertaking  to pay  expenses,  may compel the board of trustees of the trust to
call a special  meeting of  shareholders  to be held within 50 days of demand to
consider the voting  rights of the shares.  If no request for a meeting is made,
the trust may itself present the matter at any shareholders meeting.

     If voting rights are not approved at the meeting or if the acquiring person
does not deliver an acquiring person statement as required by the statute,  then
the trust may redeem any or all of the control shares for fair value  determined
as of the date of the last control share  acquisition  by the acquiror or of any
meeting  of  shareholders  at  which  the  voting  rights  of those  shares  are
considered and not approved.  The right of the trust to redeem any or all of the
control shares is subject to conditions and  limitations  listed in the statute.
The trust may not redeem  shares for which voting  rights have  previously  been
approved.  Fair  value is  determined  without  regard to the  absence of voting
rights for the control shares.  If voting rights for control shares are approved
at a shareholders  meeting and the acquiror  becomes entitled to vote a majority
of the shares entitled to vote, all other  shareholders  may exercise  appraisal
rights.  The fair  value of the  shares  as  determined  for  purposes  of these
appraisal  rights may not be less than the  highest  price per share paid by the
acquiror in the control share acquisition.


                                       72
<PAGE>

     The control share acquisition statute does not apply to the following:

     o    shares  acquired in a merger,  consolidation  or share exchange if the
          trust is a party to the transaction; or

     o    acquisitions approved or exempted by a provision in the declaration of
          trust or bylaws of the trust adopted before the acquisition of shares.

     Senior  Housing's  bylaws  contain  a  provision   exempting  any  and  all
acquisitions  by any person of Senior  Housing's  shares of beneficial  interest
from the control share  acquisition  statute.  This  provision may be amended or
eliminated at any time in the future.

Amendment to the Declaration of Trust, Dissolution and Mergers


     Under the Maryland REIT statute,  a real estate  investment trust generally
cannot dissolve,  amend its declaration of trust or merge,  unless these actions
are  approved by at least  two-thirds  of all shares  entitled to be cast on the
matter.  The  statute  allows  a  trust's  declaration  of  trust to set a lower
percentage,  so long as the  percentage  is not  less  than a  majority.  Senior
Housing's  declaration  of trust  provides for approval of any of the  foregoing
actions by a majority of shares  entitled to vote on these actions  provided the
action in question has been  approved by the Senior  Housing  board of trustees.
The  declaration  of trust  further  provides that if permitted in the future by
Maryland law, the majority required to approve any of the foregoing actions will
be the majority of shares voted.  Under the Maryland REIT statute, a declaration
of trust may permit the trustees by a two-thirds  vote to amend the  declaration
of trust from time to time to qualify as a real  estate  investment  trust under
the Internal  Revenue Code or the Maryland REIT statute  without the affirmative
vote or written consent of the  shareholders.  Senior  Housing's  declaration of
trust permits this type of action by the board of trustees.  The  declaration of
trust also permits the board of trustees to effect  changes in Senior  Housing's
unissued shares, as described more fully below, and to change the company's name
without shareholder approval,  and provides that, to the extent permitted in the
future by Maryland  law, the board of trustees may amend any other  provision of
the declaration of trust without shareholder approval.


Anti-takeover Effect of Maryland Law and of the Declaration of Trust and Bylaws

     The following provisions in Senior Housing's  declaration and bylaws and in
Maryland law could delay or prevent a change in control of Senior Housing:

     o    the  limitation  on  ownership  and  acquisition  of more than 9.8% of
          Senior Housing shares;

     o    the  classification  of the board of  trustees  into  classes  and the
          election of each class for three-year staggered terms;

     o    the  requirement  of a two-thirds  majority vote of  shareholders  for
          removal of trustees;

     o    the facts that the board can  increase the size of the board to create
          a vacancy and fill it and that  shareholders  are not  entitled to act
          without a meeting;

     o    the  provision  that only the board of trustees  may call  meetings of
          shareholders;

     o    the  advance  notice  requirements  for  shareholder  nominations  for
          trustees and other proposals;

     o    the control  share  acquisitions  provisions  of Maryland  law, if the
          applicable provisions in Senior Housing's bylaws are rescinded;

     o    the business combination provisions of Maryland law, if the applicable
          resolution  of the board of trustees is  rescinded  or if the board of
          trustees' approval of a combination is not obtained; and

     o    the ability of the board of trustees to authorize and issue additional
          shares,  including additional classes of shares with rights defined at
          the time of issuance, without shareholder approval.

                                       73
<PAGE>

                    DESCRIPTION OF SENIOR HOUSING SECURITIES


     The  following is a summary  description  of the  material  terms of Senior
Housing's shares of beneficial  interest.  Because it is a summary,  it does not
contain all of the  information  that may be  important to you. If you want more
information,  you should read Senior Housing's  declaration of trust and bylaws,
copies  of which  are  exhibits  to the  registration  statement  of which  this
prospectus is a part.


General

     Senior  Housing's  declaration of trust provides that it may issue up to 50
million shares of beneficial  interest,  $0.01 par value per share, all of which
have been  classified as common  shares.  Upon  completion  of the spin-off,  26
million common shares will be issued and outstanding.

     As permitted by the Maryland REIT statute,  Senior Housing's declaration of
trust also contains a provision  permitting  the board of trustees,  without any
action by Senior  Housing's  shareholders,  to amend the declaration of trust to
increase or decrease the total number of shares of beneficial interest, to issue
new and different  classes of shares in any amount or to reclassify any unissued
shares into other classes or series of classes that it chooses.  Senior  Housing
believes  that giving these powers to its board of trustees will provide it with
increased flexibility in structuring possible future financings and acquisitions
and in meeting  other  business  needs which might arise.  Although the board of
trustees has no  intention  at the present time of doing so, it could  authorize
Senior  Housing to issue a class or series that could,  depending upon the terms
of the class or series, delay or prevent a change in control of Senior Housing.

Common Shares

     All Senior  Housing common shares to be distributed in the spin-off will be
duly  authorized,  fully paid and  nonassessable.  Subject  to the  preferential
rights of any other  class or  series of shares  which may be issued  and to the
provisions  of  the  declaration  of  trust  regarding  the  restriction  of the
ownership  of shares of  beneficial  interest,  holders  of  common  shares  are
entitled to the following:

     o    to receive  distributions  on their shares if, as and when  authorized
          and  declared  by Senior  Housing's  board of  trustees  out of assets
          legally available for distribution; and

     o    to share  ratably in Senior  Housing's  assets  legally  available for
          distribution  to its  shareholders  in the  event of its  liquidation,
          dissolution  or winding up after payment of or adequate  provision for
          all of its known debts and liabilities.

     Subject  to the  provisions  of the  declaration  of  trust  regarding  the
restriction on the transfer of shares of beneficial  interest,  each outstanding
common share entitles the holder to one vote on all matters  submitted to a vote
of shareholders, including the election of trustees.

     Holders of common shares have no preference,  conversion, exchange, sinking
fund, redemption or appraisal rights.

     Shareholders  will have no preemptive rights to subscribe for any of Senior
Housing's  securities.  Subject to the  provisions of the  declaration  of trust
regarding the restriction on ownership of shares of beneficial interest,  common
shares will have equal distribution, liquidation and other rights.

                                       74
<PAGE>

                      SENIOR HOUSING PRINCIPAL SHAREHOLDERS

     The following table displays information regarding the beneficial ownership
of Senior  Housing's  common shares by each person  Senior  Housing knows to own
beneficially  more  than 5% of its  outstanding  common  shares,  each of Senior
Housing's  trustees and executive  officers and all of Senior Housing's trustees
and executive officers as a group. Unless otherwise noted, each person or entity
has sole voting and investment power with respect to all shares shown.

<TABLE>
<CAPTION>
                                                     Beneficial Ownership                     Beneficial Ownership
                                                     Before The Spin-Off                      After The Spin-Off(5)
                                                 --------------------------                 --------------------------
                                                   Number                                      Number
Name and Address(1)                               of Shares         Percent                  of Shares        Percent
- -------------------                              ----------         -------                 ------------     ---------
<S>                                             <C>                 <C>                       <C>            <C>
HRPT........................................     26,000,000          100%                      12,809,237      49.3%
Barry M. Portnoy(2).........................         --               --                       12,927,159      49.7%
Gerard M. Martin(2).........................         --               --                       12,927,159      49.7%
Bruce M. Gans, M.D..........................         --               --                              200        *
Arthur G. Koumantzelis......................         --               --                              319        *
David J. Hegarty(3).........................         --               --                            2,670        *
Ajay Saini(4)...............................         --               --                            1,352        *
All Trustees and executive officers as a
group (six persons).........................         --               --                       12,936,185      49.8%

- -------------------------
<FN>
* Less than 1%.
(1)  The address of HRPT is 400 Centre Street,  Newton,  Massachusetts  02458. The address of each other named
     person or entity is c/o Senior Housing Properties Trust, 400 Centre Street, Newton, Massachusetts 02458.
(2)  Messrs.  Portnoy and Martin are each managing trustees of HRPT.  Accordingly,  Messrs. Portnoy and Martin
     may be deemed to have beneficial ownership of the shares indicated in the table as owned by HRPT. Messrs.
     Portnoy  and Martin  indirectly  will  jointly  own 113,437  shares.  Each of Messrs.  Portnoy and Martin
     individually own 4,485 shares.
(3)  Includes 230 shares held jointly by Mr. Hegarty and his wife.
(4)  Includes 50 shares in Mr. Saini's IRA account and two shares as custodian for Mr. Saini's minor daughter.
(5)  The number of shares and percentages  presented assumes that 131.9 million HRPT shares are outstanding on
     the record date. If all of the outstanding HRPT convertible subordinated debentures were converted at $18
     per share to HRPT  common  shares on or prior to the record  date,  the  number of shares and  applicable
     percentages would be as follows: HRPT, 11.7 million shares (44.9%); Barry M. Portnoy, 11.8 million shares
     (45.3%); Gerard M. Martin 11.8 million shares (45.3%); and all trustees and executive officers as a group
     (six persons), 11.8 million shares (45.4%).
</FN>
</TABLE>

                    FEDERAL INCOME TAX AND ERISA CONSEQUENCES

General

     The  following  summary   description  of  federal  income  tax  and  ERISA
consequences relating to HRPT, Senior Housing and their respective  shareholders
supplements  the  description of these matters in our annual report on Form 10-K
for the year  ended  December  31,  1998.  Sullivan  &  Worcester  LLP,  Boston,
Massachusetts, has rendered a legal opinion that the discussions in this section
are accurate in all material  respects and fairly  summarize the federal  income
tax and ERISA issues of the spin-off, and the opinions of counsel referred to in
this section  represent  Sullivan & Worcester  LLP's opinions on those subjects.
Specifically,  subject to the  qualifications  and assumptions  contained in its
opinions  and in this  prospectus,  Sullivan  and  Worcester  LLP  has  rendered
opinions to the effect that:

                                       75
<PAGE>

     o    we have been organized and have qualified as a REIT under the Internal
          Revenue  Code of 1986,  as amended,  for our 1987 through 1998 taxable
          years,  and our current  investments and plan of operation will enable
          us to continue to meet the requirements for qualification and taxation
          as a REIT under the Internal Revenue Code; our actual qualification as
          a REIT,  however,  will  depend  upon our  ability  to  meet,  and our
          meeting,  through actual annual operating  results and  distributions,
          the  various  REIT  qualification  tests  imposed  under the  Internal
          Revenue Code;

     o    under the Department of Labor's ERISA "plan assets"  regulations,  our
          common shares are publicly offered  securities and our assets will not
          be deemed plan assets under ERISA;

     o    for its 1999 taxable year that  commences on the date of the spin-off,
          Senior Housing will be organized as a REIT under the Internal  Revenue
          Code, and its current investments and plan of operation will enable it
          to meet the  requirements  for  qualification  and  taxation as a REIT
          under the Internal Revenue Code; Senior Housing's actual qualification
          as a REIT,  however,  will depend  upon its  ability to meet,  and its
          meeting,  through actual annual operating  results and  distributions,
          the  various  REIT  qualification  tests  imposed  under the  Internal
          Revenue Code; and

     o    under the plan assets regulations, Senior Housing's common shares will
          be publicly offered  securities and its assets will not be deemed plan
          assets under ERISA.


These opinions are conditioned upon the assumption that our and Senior Housing's
leases,  our  and  Senior  Housing's  declarations  of  trust  and  Bylaws,  the
transaction  agreement,  and all  other  legal  documents  to which we or Senior
Housing are or have been a party to have been and will be  complied  with by all
parties to these  documents,  upon the accuracy and  completeness of the factual
matters described in this prospectus,  and upon factual  representations  we and
Senior  Housing have made. The opinions of Sullivan & Worcester LLP are based on
the law as it exists today, but the law may change in the future,  possibly with
retroactive  effect.  Also, an opinion of counsel is not binding on the Internal
Revenue  Service  or the  courts,  and the IRS or a court  could take a position
different from that expressed by counsel.


     The following summary of federal income tax and ERISA consequences is based
on  existing  law,  and is  limited to  investors  who own our shares and Senior
Housing shares as investment assets rather than as inventory or as property used
in a trade  or  business.  The  summary  does not  discuss  the  particular  tax
consequences  that might be relevant to you if you are subject to special  rules
under the federal income tax law, for example if you are:

     o    a bank, life insurance company, regulated investment company, or other
          financial institution,

     o    a broker or dealer in securities or foreign currency,

     o    a person who has a functional currency other than the U.S. dollar,

     o    a  person  who  acquires  our  shares  or  Senior  Housing  shares  in
          connection with his employment or other performance of services,

     o    a person subject to alternative minimum tax,

     o    a person  who owns our  shares or Senior  Housing  shares as part of a
          straddle, hedging transaction, or conversion transaction, or

     o    except  as  specifically   described  in  the  following   summary,  a
          tax-exempt entity or a foreign person.


The  sections of the Internal  Revenue  Code that govern the federal  income tax
qualification  and treatment of a REIT and its  shareholders  are complex.  This
presentation  is a summary  of  applicable  Internal  Revenue  Code  provisions,
related rules and regulations and administrative  and judicial  interpretations,
all of which are subject

                                       76
<PAGE>

to change,  possibly with retroactive effect.  Future legislative,  judicial, or
administrative actions or decisions could affect the accuracy of statements made
in this summary.  Neither we nor Senior Housing has sought a ruling from the IRS
with respect to any matter described in this summary,  and neither we nor Senior
Housing  can assure  you that the IRS or a court will agree with the  statements
made in this summary.  In addition,  the following  summary is not exhaustive of
all possible tax consequences, and does not discuss any state, local, or foreign
tax  consequences.  For  all  these  reasons,  we urge  you and any  prospective
acquiror  of Senior  Housing  shares to  consult  with a tax  advisor  about the
federal income tax and other tax consequences of the acquisition,  ownership and
disposition of our shares, as well as the acquisition, ownership and disposition
of Senior Housing shares.


     Federal income tax  consequences  may differ  depending on whether or not a
person is a "U.S.  person."  For  purposes of this  summary,  a U.S.  person for
federal income tax purposes is:

     o    a  citizen  or  resident  of the  United  States,  including  an alien
          individual who is a lawful permanent  resident of the United States or
          meets the substantial presence residency test under the federal income
          tax laws,

     o    a corporation, partnership or other entity treated as a corporation or
          partnership  for  federal  income  tax  purposes,  that is  created or
          organized in or under the laws of the United States, any state thereof
          or the District of  Columbia,  unless  otherwise  provided by Treasury
          regulations,

     o    an estate the income of which is  subject to federal  income  taxation
          regardless of its source, or

     o    a trust  if a court  within  the  United  States  is able to  exercise
          primary  supervision over the  administration  of the trust and one or
          more  United  States   persons  have  the  authority  to  control  all
          substantial decisions of the trust, or electing trusts in existence on
          August 20, 1996 to the extent provided in Treasury regulations,

whose status as a U.S. person is not overridden by an applicable tax treaty.

Federal Income Tax Consequences of the Spin-Off to Our Shareholders

     In General.  Our distribution of Senior Housing shares in the spin-off will
affect us and our  shareholders in the same manner as any other  distribution of
cash or property we make. These tax consequences are summarized below:

     o    We generally are not subject to tax on our net income to the extent we
          distribute it to our shareholders.

     o    Distributions  to you out of our current or  accumulated  earnings and
          profits that we do not designate as capital gain  dividends  generally
          will be taken into account by you as ordinary income dividends. To the
          extent of our net capital gain for the taxable  year, we may designate
          dividends  as capital  gain  dividends  that will be taxable to you as
          long-term capital gain.

     o    Distributions  in excess of our current and  accumulated  earnings and
          profits  will not be  taxable  to you to the  extent  that they do not
          exceed your adjusted  basis in our shares,  but rather will reduce the
          adjusted basis in those shares.

     o    Distributions  in excess of our current and  accumulated  earnings and
          profits that exceed your adjusted  basis in our shares  generally will
          be taxable as capital gain from the sale of those shares.

     o    Our current  earnings and profits for a year will be  allocated  among
          each of the  distributions  for that year, in proportion to the amount
          of each distribution.

                                       77
<PAGE>

     o   Because we are a REIT,  neither our ordinary  income  dividends nor our
         capital  gain  dividends  will  qualify  for  any  dividends   received
         deduction for our corporate shareholders.

     Accordingly,  the  spin-off of Senior  Housing  shares will be treated as a
distribution by us to our shareholders in the amount of the fair market value of
the  Senior  Housing  shares  distributed.  We  expect  that a  portion  of this
distribution  will be taxable to you as a dividend and a portion will be treated
as a tax-free  reduction in your adjusted  basis in our shares.  You will have a
tax basis in the Senior  Housing  shares you receive  equal to their fair market
value at the time of the  spin-off,  and your  holding  period  in those  shares
commences on the day after the spin-off.

     We believe  that for all federal  income tax purposes  each Senior  Housing
share may be  properly  valued on the  distribution  date as the  average of the
reported  high and low trading  prices for Senior  Housing  shares in the public
market  on that  date,  and we will  perform  all our tax  reporting,  including
statements  supplied to you and to the IRS, on the basis of this average  price,
called the distribution  price.  However, it is possible that for federal income
tax purposes the fair market value of a Senior  Housing share that we distribute
will differ from the fair market value of a Senior Housing share received by you
in the  distribution.  Because of the factual  nature of the value of the Senior
Housing  shares  distributed  by us and the value of the Senior  Housing  shares
received  by each of you,  our  counsel  is unable to render an opinion on these
values.


     As described in more detail below,  although  existing  authority  does not
provide  definitive  guidance  on valuing  Senior  Housing  shares or on whether
Section  351(a)  applies  to  the  spin-off,  on  the  basis  of  our  valuation
assumptions  and our counsel's  opinion that Section 351(a) likely  applies,  we
will:

     o    recognize a significant  portion of the gains, but none of the losses,
          on Senior Housing's properties and other assets; and

     o    recognize  gains but not losses on our  distribution of Senior Housing
          shares.

We will perform all our tax reporting,  including statements sent to the IRS and
to you, on this basis, but we could in the future be required to amend these tax
reports if the IRS  successfully  challenges  our valuation  assumptions  or our
counsel's  interpretation  of the  federal  income  tax  laws .  Gains  that  we
recognize in the spin-off will  increase our 1999 current  earnings and profits,
and this will increase the total amount of our 1999 distributions, including the
distribution  of Senior  Housing  shares,  that is taxable as a dividend to you.
Computing the amount of these gains and the additional  taxable  dividend amount
is a complex calculation which requires information,  including the distribution
price for Senior  Housing  shares at the time of the spin-off and market  values
for Senior Housing properties and other assets at the time of the spin-off, that
is not available at this time. Based on our current market value assumptions, on
the  total  number  of our  shares  presently  outstanding,  and  on an  assumed
distribution  price for Senior Housing shares of $24 per share, we estimate that
if you own one of our common shares for the entire 1999 calendar year, then as a
result  of the  Senior  Housing  spin-off  you will have an  additional  taxable
dividend of  approximately  $1.20 per share.  For higher  Senior  Housing  share
distribution prices, the additional taxable dividend amount would be higher, and
for lower  distribution  prices the additional  taxable dividend amount would be
lower. Based on our current assumptions, we estimate that the additional taxable
dividend may fluctuate by up to $0.20 per HRPT share for each $1  fluctuation in
the  distribution  price  for  Senior  Housing  shares.  However,  a  definitive
additional  taxable  dividend  computation  will not be possible until after the
spin-off.


     To the extent we can, we intend to  designate  a portion of any  additional
taxable  dividend as a capital gain dividend that  generally  will be subject to
tax at the  maximum  capital  gain  rates  of 20%  and  25% in the  case  of our
noncorporate shareholders.

     Taxation of  Tax-Exempt  Entities.  Tax-exempt  entities are  generally not
subject  to federal  income  taxation  except to the extent of their  "unrelated
business  taxable  income,"  often  referred  to as UBTI,  as defined in Section
512(a)  of the  Internal  Revenue  Code.  As with our other  distributions,  the
distribution  of Senior  Housing  shares to you if you are a  tax-exempt  entity
should  generally not constitute  UBTI,  provided that you

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<PAGE>

have not financed the  acquisition of our shares with  acquisition  indebtedness
within the meaning of Section 514 of the Internal Revenue Code.  However, if you
are a tax-exempt pension trust,  including a so-called 401(k) plan but excluding
an individual retirement account or government pension plan, that owns more than
10% by value of a  pension-held  REIT,  then you may have to report a portion of
the dividends that you receive from the REIT as UBTI. Although we cannot provide
complete assurance on this matter, we believe that we have not been and will not
become a pension-held REIT.


     Taxation of Non-U.S. Persons. If you are a non-U.S. person, the spin-off of
Senior Housing shares will generally be taxable to you in the same manner as any
other  distribution of cash or property that we make to you. The rules governing
the federal income taxation of non-U.S.  persons are complex,  and the following
discussion is intended  only as a summary of these rules.  If you are a non-U.S.
person, we urge you to consult with your own tax advisor to determine the impact
of federal,  state, local, and foreign tax laws, including any tax return filing
and other reporting requirements, with respect to the spin-off of Senior Housing
shares and your investment in our shares.


     You will  generally  be subject to regular  federal  income tax in the same
manner as a U.S.  person with respect to the spin-off of Senior  Housing  shares
and your investment in our shares,  if this investment is effectively  connected
with your conduct of a trade or business in the United States.  In addition,  if
you are a corporate shareholder,  your income that is effectively connected with
a trade or business  in the United  States may also be subject to the 30% branch
profits tax under Section 884 of the Internal  Revenue Code, which is payable in
addition to regular  federal  corporate  income tax. The balance of this summary
addresses only those non-U.S.  persons whose  investment in our common shares is
not effectively  connected with the conduct of a trade or business in the United
States.

     We are not at this time  designating  the  distribution  of Senior  Housing
shares as a  capital  gain  dividend  that is  subject  to 35%  withholding  for
non-U.S.  persons,  and  accordingly  the 30% or  applicable  lower  treaty rate
withholding  will be imposed upon the fair market value of Senior Housing shares
that we  distribute  to you.  We or other  applicable  withholding  agents  will
collect the amount required to be withheld by reducing to cash for remittance to
the IRS a  sufficient  portion  of the  Senior  Housing  shares  that you  would
otherwise  receive,  and you will  bear the  brokerage  or other  costs for this
withholding  procedure.  Because we cannot determine our current and accumulated
earnings and profits until the end of our taxable year,  withholding at the rate
of 30% or applicable  lower treaty rate will be imposed on the gross fair market
value of the Senior Housing shares distributed to you.  Notwithstanding this and
other  withholding  on  distributions  in excess of our current and  accumulated
earnings and profits,  these distributions are a nontaxable return of capital to
the extent that they do not exceed your  adjusted  basis in our shares,  and the
nontaxable return of capital will reduce your adjusted basis in these shares. To
the extent that distributions in excess of current and accumulated  earnings and
profits exceed your adjusted basis in our shares,  the  distributions  will give
rise to tax liability only if you would  otherwise be subject to tax on any gain
from the sale or exchange of our shares.  Your gain from the sale or exchange of
our shares will not be taxable if:


     o    our shares are  "regularly  traded"  within  the  meaning of  Treasury
          regulations  under  Section 897 of the  Internal  Revenue Code and you
          have at all times during the preceding  five years owned 5% or less by
          value of our outstanding shares, or

     o    we are a "domestically  controlled REIT" within the meaning of Section
          897 of the Internal Revenue Code.


Although we cannot provide  complete  assurance on this matter,  we believe that
our shares are regularly traded and that we are a domestically  controlled REIT.
You may seek a refund of amounts  withheld on  distributions to you in excess of
our current and accumulated earnings and profits,  provided that you furnish the
required information to the IRS.


     We expect that a portion of some or all of our 1999  distributions  will be
treated for federal income tax purposes as attributable  to our  dispositions of
United  States real property  interests.  To the extent that a portion

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<PAGE>

of any of our  distributions,  including  the  distribution  of  Senior  Housing
shares,  is  attributable  to our  disposition  of United  States real  property
interests,  you will be  subject  to tax on this  portion as though it were gain
effectively  connected  with  a  trade  or  business  in  the  United  States  .
Accordingly,  you will be  taxed on these  amounts  at the  capital  gain  rates
applicable to a U.S. person,  subject to any applicable  alternative minimum tax
and to a  special  alternative  minimum  tax in the  case of  nonresident  alien
individuals;  you will be required to file a United  States  federal  income tax
return  reporting  these amounts,  even if applicable  withholding is imposed as
described  below;  and if you are a  corporation,  you  may  owe the 30%  branch
profits tax under  Section 884 of the Internal  Revenue Code in respect of these
amounts.


     We and other  applicable  withholding  agents  will be required to withhold
from  distributions to shareholders that are non-U.S.  persons,  and to remit to
the IRS, 35% of the maximum amount of any distribution  that could be designated
by  us  as  a  capital  gain  dividend.  In  addition,  if  we  designate  prior
distributions as capital gain dividends, then subsequent distributions up to the
amount of the  designated  prior  distributions  will be treated as capital gain
dividends for purposes of the 35% withholding  rule. After the close of our 1999
taxable year, we expect to designate to the maximum extent possible a portion of
one or more of our 1999 distributions as capital gain dividends, and accordingly
35% withholding  will be imposed upon our subsequent  distributions  to non-U.S.
persons to that extent.

     The  amount  of any tax  withheld  on  distributions  to you is  creditable
against your United States federal  income tax liability,  and any amount of tax
withheld  in  excess  of that  tax  liability  may be  refunded  if you  file an
appropriate  claim for refund with the IRS. New Treasury  regulations will alter
reporting of and  withholding on  distributions  paid to you with respect to our
shares. Under recent administrative guidance, these new Treasury regulations are
to be effective generally for payments made after December 31, 2000. Among other
changes,  the new Treasury  regulations  generally require non-U.S.  persons and
withholding  agents  to use  the new IRS  Forms  W-8  series,  rather  than  the
predecessor IRS Forms W-8, 1001 and 4224.

Federal Income Tax Consequences of the Spin-Off to HRPT

     The Internal Revenue Code imposes upon us various REIT qualification  tests
comparable to those imposed upon Senior  Housing and discussed  below.  While we
believe  that we have  operated  and will  operate  in a manner to  satisfy  the
various REIT qualification  tests,  counsel has not reviewed and will not review
our compliance with these tests on a continuing basis. The following  discussion
summarizes REIT  qualification  and taxation  issues under the Internal  Revenue
Code implicated by our spin-off of Senior Housing shares.

     In  General.  So long as Senior  Housing  and its  subsidiaries  remain our
wholly  owned  direct or  indirect  subsidiaries,  they will be  qualified  REIT
subsidiaries under Section 856(i) of the Internal Revenue Code or, equivalently,
noncorporate  entities  that are  taxed as part of us under  regulations  issued
under  Section 7701 of the Internal  Revenue Code.  During these periods  Senior
Housing  and its  subsidiaries  will not be  taxpayers  separate  from  HRPT for
federal income tax purposes. Under the transaction agreement, the federal income
tax  liabilities  and  federal  income tax  filings  for Senior  Housing and its
subsidiaries for these periods are the responsibility of HRPT.

     When we cease to wholly own Senior Housing and its subsidiaries as a result
of the spin-off of Senior Housing  shares,  the following will be deemed to have
occurred for federal income tax purposes:


     o    Immediately  preceding  the  spin-off  of Senior  Housing  shares,  we
          disposed  of the  properties  and  assets  of Senior  Housing  and its
          subsidiaries in an exchange,  called a deemed  exchange,  in which our
          aggregate  amount realized equaled the sum of the fair market value of
          the total  number of Senior  Housing  shares  owned by us  immediately
          preceding the spin-off,  plus the promissory  obligations  owing to us
          from Senior Housing immediately preceding the spin-off,  including the
          then  outstanding  balance of  principal  and accrued  interest on the
          formation  debt,  plus the aggregate  amount of  liabilities  that are
          associated  with the  Senior  Housing  properties  and assets and that
          remain the responsibility of Senior Housing and its subsidiaries after
          the spin-off.


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<PAGE>

     o    Immediately   after  the  deemed  exchange,   we  distributed  to  our
          shareholders 13.2 million of the Senior Housing shares we were treated
          as having received in the deemed exchange.

     Valuing Senior Housing Shares.  Our aggregate amount realized in the deemed
exchange and our tax consequences upon the distribution of Senior Housing shares
both  depend  on the fair  market  value of the  Senior  Housing  shares.  Under
applicable  judicial  precedent,  it is  possible  that for  federal  income tax
purposes the following three valuations may differ:


     o    the per share fair market  value of the Senior  Housing  shares we are
          treated as receiving in the deemed exchange;

     o    the per share fair market value of the Senior  Housing  shares that we
          distribute; and

     o    the average of the reported high and low trading prices for the Senior
          Housing  shares  in the  public  market  on the date of the  spin-off,
          called the distribution price.


Because  of the  factual  nature  of the  value of the  Senior  Housing  shares,
Sullivan &  Worcester  LLP is unable to render an opinion  on these  values.  We
believe that for all federal income tax purposes the per share fair market value
of Senior  Housing  shares may be  properly  valued at the  distribution  price.
Accordingly,  the  distribution  price  will be used for all our tax  reporting,
including for purposes of computing the aggregate  amount realized in the deemed
exchange  and for  purposes  of  computing  any  gain or loss we may have on the
distribution  of Senior  Housing  shares.  We may be required to amend these tax
reports,  including  those  sent to our  shareholders,  if the IRS  successfully
challenges our valuation assumptions.

     Taxation of the Deemed  Exchange.  The Internal Revenue Code and applicable
authorities do not provide definitive guidance on whether Section 351(a) applies
to the deemed  exchange.  Sullivan & Worcester  LLP has opined that it is likely
that the deemed  exchange is an exchange  under  Section  351(a) which will be a
partially  taxable  transaction in which our losses are not  recognized,  and in
which our gains are recognized only to the extent of the value of property other
than Senior Housing shares,  including the outstanding  balance of principal and
accrued  interest on the formation debt, that we receive in the deemed exchange.
We  expect  that the then  outstanding  balance  on the  formation  debt will be
sufficiently large so that we will recognize a significant  portion of our gains
realized in the deemed exchange.

     However,  if the deemed  exchange is not an exchange under Section  351(a),
then the deemed exchange will be a fully taxable  transaction in which our gains
are  recognized in full  immediately,  and in which our losses are recognized in
full  when we own 50% or less of both the  voting  power and the value of Senior
Housing's  outstanding  stock.  Although  the IRS  could  assert  that a control
premium  causes  us to own more than 50% of the  value of  Senior  Housing  even
though we own less than half of its shares,  we believe  that our  ownership  of
Senior Housing will be below the 50% voting and valuation thresholds immediately
after the spin-off.  Because of the factual nature of valuations, our counsel is
unable to render an opinion on values.  Whether or not the deemed exchange is an
exchange  under Section  351(a) also will have an impact on our tax basis in the
Senior Housing shares that we distribute and those that we retain, as well as on
Senior Housing's  initial tax bases and depreciation  schedule in its properties
and assets, all as described below.

     Whether the deemed  exchange is an exchange  under Section  351(a)  depends
upon the  application  of rules that  foreclose  Section  351(a)  treatment  for
property  transfers  to a REIT  that  accomplish  diversification.  Thus,  under
Section 1.351-1(c) of the Treasury  Regulations,  if the deemed exchange and our
distribution  of Senior Housing shares result,  directly or indirectly,  in HRPT
diversifying its ownership of the Senior Housing properties and assets, then the
deemed exchange will not be an exchange under Section 351(a).  For this purpose,
there is no proscribed diversification if either:

     o    there is no plan or intention for Senior  Housing to issue more than a
          de minimis number of shares following the spin-off, or


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<PAGE>


     o    the  Senior  Housing  portfolio  of  properties  and assets is already
          sufficiently diversified.

Although it is contemplated  that Senior Housing will issue additional shares in
the future to raise capital and grow as an independent  REIT, at the time of the
spin-off we expect there to be no specific plan for raising additional  capital.
In addition,  we believe that the Senior Housing  portfolio is  diversified  for
purposes of these rules,  given the  properties'  diversity in geography,  size,
age,  operating  history and  remaining  lease terms.  While it is true that the
Senior  Housing  properties  are at  present  leased to only a modest  number of
tenants,  we believe  this does not detract from the  diversified  nature of the
Senior Housing portfolio because the owner of the portfolio continues to have an
economic stake in each individual property through its residual interest in each
property at the expiration of that property's lease term, and receiving rent, in
respect of a significant number of properties in the portfolio, that is based in
part on the  gross  revenues  which  the  tenant  is able to  derive  from  that
property.  Further, we believe that the Senior Housing portfolio's modest number
of tenants is  consistent  with the  business  model of several  other  publicly
traded REITs and with prudent real estate investment practices generally.  Based
on these and other representations we made regarding the diversity of the Senior
Housing  portfolio,  our  counsel  has opined  that it is likely that the deemed
exchange will be an exchange  described in Section  351(a),  and we will perform
all our tax reporting,  including statements supplied to our shareholders and to
the IRS, accordingly.  We may be required to amend these tax reports,  including
those sent to our shareholders,  if the IRS successfully challenges our position
that the deemed exchange is an exchange  described in Section 351(a).  We expect
to  ensure  our  1999 and  future  compliance  with  the 95%  REIT  distribution
requirements  of the  Internal  Revenue  Code  by  making  distributions  to our
shareholders that are sufficient regardless of whether the deemed exchange is an
exchange described under Section 351(a).


     Regardless  of whether  Section  351(a)  governs the deemed  exchange,  the
aggregate amount realized in the deemed exchange,  as well as the property other
than  Senior  Housing  shares  that we receive in the deemed  exchange,  will be
allocated  among the assets of Senior  Housing in proportion  to their  relative
fair market values.  With respect to each Senior Housing asset,  we will realize
gain or loss, as the case may be, equal to the difference  between the aggregate
amount realized in the deemed exchange  allocable to that asset and our adjusted
tax basis in that asset. If Section 351(a) applies to the deemed exchange,  then
we will recognize any realized gain in a Senior Housing asset only to the extent
of that  asset's  allocable  share of the  property  we  receive  in the  deemed
exchange  other  than  Senior  Housing  shares,  and we will not  recognize  any
realized  loss in a Senior  Housing  asset.  We and our wholly  owned direct and
indirect  subsidiaries have held the Senior Housing assets for investment with a
view to long-term income production and capital appreciation, and the conversion
of  Senior  Housing  into a  separate  REIT by means of the  spin-off  of Senior
Housing shares represents a new, unique opportunity to maximize the value of our
investment in the Senior Housing assets.  We therefore believe that our gains on
Senior Housing assets in the deemed  exchange will be gains from assets held for
investment.  Accordingly, our gains on realty or mortgages on real property will
be  qualifying  gross income under the 75% and 95% gross income tests of Section
856(c)(2)-(3)  of the Internal  Revenue  Code.  Although our gains on personalty
other than mortgages  will not be qualifying  income under either the 75% or the
95% gross  income test,  we expect to recognize  little or no gain of this type.
However,  if any of our gains on Senior  Housing  assets in the deemed  exchange
were to be  characterized  as gains from the  disposition  of inventory or other
property held  primarily for sale to customers,  these gains would be subject to
the 100%  penalty tax of Section  857(b)(6)  of the Internal  Revenue  Code.  In
addition, some of the Senior Housing assets in the deemed exchange were acquired
in carryover basis  transactions from C corporations  within the last ten years.
Accordingly,  we are subject to a  REIT-level  federal tax on the gains on these
assets,  which federal tax we anticipate to be less than $1 million. Our payment
of this  REIT-level  federal tax will constitute a deduction for us in computing
the amount of our income  that we must  distribute  to our  shareholders  and in
computing the portion of our  distributions to our shareholders that constitutes
taxable income rather than a return of capital.


     Taxation of the Distribution.  Our distribution of Senior Housing shares in
the  spin-off  will be treated in the same manner as any other  distribution  of
cash or property that we may make.  Thus,  the  distribution  of Senior  Housing
shares together with our other 1999 distributions will entitle us to a dividends
paid deduction to the extent of our earnings and profits for the year,  assuming
as  expected  that these  distributions  exceed our  earnings  and  profits.  In
addition,  we will recognize gain from the  distribution of these Senior Housing
shares equal to the excess, if any, of the fair market value of the total number
of  Senior  Housing  shares  that we

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<PAGE>

distribute,  over our tax basis in those  distributed  Senior Housing shares. In
contrast,  we will not recognize loss on the distribution  even if our tax basis
in the distributed Senior Housing shares exceeds their fair market value.


     Under applicable judicial precedent, it is possible that for federal income
tax  purposes the per share fair market  value of the Senior  Housing  shares we
distribute will differ from the distribution price. In addition,  our counsel is
unable to render an  opinion  on the fair  market  value of the total  number of
Senior Housing shares that we distribute  because of the factual nature of value
determinations.  However, on the basis of valuation assumptions described above,
the fair  market  value of the total  number of Senior  Housing  shares  that we
distribute may be computed as the distribution price multiplied by the number of
Senior  Housing  shares  distributed.  Our tax basis in the  distributed  Senior
Housing shares is computed as described  below and depends upon whether  Section
351(a) governs the deemed exchange.

     Any gain that we recognize on our  distribution  of Senior  Housing  shares
will be  qualifying  gross  income  under the 75% and 95% gross  income tests of
Section  856(c)(2)-(3)  of the Internal  Revenue Code,  provided that we are not
treated as holding the  distributed  Senior Housing shares as inventory or other
property  held  primarily  for  sale  to  customers.  If any of this  gain  were
characterized as the sale of inventory or other property held primarily for sale
to customers, this would not affect our ability to satisfy the 75% and 95% gross
income tests, but the recharacterized  gain would be subject to the 100% penalty
tax of Section  857(b)(6) of the Internal Revenue Code.  Although we can provide
no assurance on this matter, because we and our wholly owned direct and indirect
subsidiaries  have held the Senior Housing  properties and assets for investment
with a view to long-term income production and capital appreciation, and because
the  conversion  of  Senior  Housing  into  a  separate  REIT  by  means  of the
distribution of Senior Housing shares  represents a new,  unique  opportunity to
maximize  the value of our  investment  in the  Senior  Housing  properties  and
assets,  we do not  believe  that we have  held the  Senior  Housing  shares  as
inventory or other property held primarily for sale to customers.

     If we are correct that the deemed  exchange is governed by Section  351(a),
then  our  tax  basis  in the  100% of the  Senior  Housing  shares  that we own
immediately prior to the distribution of Senior Housing shares will be equal to,
and our tax basis in each  individual  Senior Housing share will be its pro rata
share of, the following sum:

     (1)  our aggregate  adjusted tax bases in the Senior Housing properties and
          assets immediately prior to the deemed exchange; plus

     (2)  all gains that we recognize in the deemed exchange; minus

     (3)  Senior  Housing's  promissory  obligations  owing  to  us  immediately
          preceding the  spin-off,  including  the then  outstanding  balance of
          principal and accrued interest on the formation debt; minus

     (4)  the  aggregate  amount of  liabilities  that are  associated  with the
          Senior   Housing   properties   and   assets   and  that   remain  the
          responsibility  of  Senior  Housing  and its  subsidiaries  after  the
          spin-off.

As described  above, we believe that each Senior Housing share we receive in the
deemed exchange may be valued at the  distribution  price,  and we expect that a
significant  portion of the realized gains, but none of the realized losses,  in
the deemed  exchange  will be  recognized.  Accordingly,  we expect that our tax
basis in each of the Senior Housing shares that we own immediately  prior to the
distribution  will  be,  at  most,  only  a few  dollars  per  share  below  the
distribution  price, and may possibly exceed the distribution price. Under these
circumstances, we could recognize gain but no loss on our distribution of Senior
Housing shares.

     Alternatively,  if the deemed  exchange is not governed by Section  351(a),
our tax basis in the 100% of the Senior Housing  shares that we own  immediately
prior to the spin-off will be their fair market value as determined for purposes
of computing our aggregate amount realized in the deemed exchange.  Accordingly,
in the spin-off we would be distributing  Senior Housing shares that each have a
fair market value and tax basis equal to the distribution price, and so we would
not recognize any gain or loss in the distribution.

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<PAGE>

     Our Continued  Investments in Senior  Housing.  After the  distribution  of
Senior Housing  shares,  we will continue to own Senior Housing  shares,  and we
expect Senior Housing to qualify as a REIT under the Internal  Revenue Code. For
so long as it qualifies as a REIT,  our continued  investment in Senior  Housing
shares will count favorably  toward the 75%, 25%, 10%, and 5% gross assets tests
of Section  856(c)(4)  of the Internal  Revenue  Code;  similarly,  the dividend
income we receive on Senior Housing  shares will count as qualifying  income for
us under the 75% and 95% gross  income  tests of  Section  856(c)(2)-(3)  of the
Internal Revenue Code.

     We expect  Senior  Housing  to pay off the  formation  debt soon  after our
spin-off  of  Senior  Housing  shares,  but if it does  not do so,  then we will
exercise our rights to have the formation  debt  adequately  secured,  within 20
days of the spin-off,  by mortgages on the real property owned by one or more of
Senior Housing's subsidiaries. Accordingly, we expect that if the formation debt
is not  paid in full  soon  after  the  spin-off,  then  our  investment  in the
formation  debt,  as adequately  secured by mortgages on real estate,  will also
count  favorably  toward the 75%, 25%, 10%, and 5% gross assets tests of Section
856(c)(4) of the Internal  Revenue Code, and similarly the interest  income from
the formation debt will count as qualifying  income for us under the 75% and 95%
gross income tests of Section 856(c)(2)-(3) of the Internal Revenue Code.

     The transaction  agreement contains  provisions that require Senior Housing
and HRPT to  refrain  from  taking  actions  that may  jeopardize  each  other's
qualification as a REIT under the Internal Revenue Code.

Federal Income Taxation of Senior Housing and its Shareholders

     In General.  Senior Housing will elect to be taxed as a REIT under Sections
856 through 860 of the Internal  Revenue Code  commencing  with its 1999 taxable
year.  Senior Housing's 1999 taxable year will begin when it ceases to be wholly
owned by HRPT and will end on December 31, 1999. Senior Housing's REIT election,
assuming  continuing  compliance with the federal income tax qualification tests
summarized below,  continues in effect for subsequent taxable years. Although no
assurance can be given,  Senior  Housing  believes that it will be organized and
will  operate  in a manner  that  qualifies  it to be taxed  under the  Internal
Revenue Code as a REIT.

     As a REIT,  Senior Housing  generally will not be subject to federal income
tax  on  its  net  income   distributed   as  dividends  to  its   shareholders.
Distributions  to Senior  Housing  shareholders  generally will be includable in
their income as dividends to the extent the  distributions  do not exceed Senior
Housing's  current  or  accumulated  earnings  and  profits.  A portion of these
dividends  may be treated as capital  gain  dividends,  as explained  below.  No
portion of any dividends will be eligible for the dividends  received  deduction
for corporate  shareholders.  Distributions  in excess of current or accumulated
earnings and profits  generally  will be treated for federal income tax purposes
as a return of capital to the extent of a recipient  shareholder's  basis in its
shares, and will reduce this basis.

     Senior Housing's counsel,  Sullivan & Worcester LLP, has opined that Senior
Housing will be organized as a REIT under the Internal Revenue Code for its 1999
taxable year, and that its current investments and plan of operation will enable
it to meet the requirements for  qualification  and taxation as a REIT under the
Internal Revenue Code.  Senior Housing's actual  qualification and taxation as a
REIT will depend upon its ability to meet the various REIT  qualification  tests
imposed  under the Internal  Revenue  Code and  summarized  below.  While Senior
Housing  believes  that it will  operate in a manner to satisfy the various REIT
qualification  tests,  counsel has not reviewed  and will not review  compliance
with these tests on a continuing  basis. If Senior Housing fails to qualify as a
REIT in any year, it will be subject to federal income  taxation as if it were a
domestic  corporation,  and its shareholders  will be taxed like shareholders of
ordinary  corporations.  In this  event,  Senior  Housing  could be  subject  to
significant tax  liabilities,  and the amount of cash available for distribution
to its shareholders may be reduced or eliminated.

     If Senior Housing  qualifies for taxation as a REIT and  distributes to its
shareholders at least 95% of its "real estate  investment trust taxable income,"
computed by excluding  any net capital  gain and before  taking into account any
dividends  paid  deduction  for which it is eligible,  it generally  will not be
subject to federal

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corporate  income  taxes on the  amount  distributed.  However,  even if  Senior
Housing  qualifies for federal  income  taxation as a REIT, it may be subject to
federal tax in the following circumstances:

     o    Senior  Housing  will be  taxed  at  regular  corporate  rates  on any
          undistributed "real estate investment trust taxable income," including
          its undistributed net capital gains.

     o    If Senior  Housing's  alternative  minimum  taxable income exceeds its
          taxable income, it may be subject to the corporate alternative minimum
          tax on its items of tax preference.


     o    If Senior Housing has net income from the sale or other disposition of
          "foreclosure property" that is held primarily for sale to customers in
          the  ordinary  course of business or other  nonqualifying  income from
          foreclosure  property, it will be subject to tax on this income at the
          highest regular corporate rate, which is currently 35%.


     o    If  Senior  Housing  has  net  income  from  prohibited  transactions,
          including  sales or other  dispositions  of inventory or property held
          primarily  for sale to customers  in the  ordinary  course of business
          other  than  foreclosure  property,  it will be subject to tax on this
          income at a 100% rate.

     o    If Senior  Housing  fails to satisfy the 75% gross  income test or the
          95% gross income test discussed below,  but nonetheless  maintains its
          qualification  as a REIT,  it will be subject to tax at a 100% rate on
          the  greater  of the amount by which it fails the 75% or the 95% test,
          multiplied by a fraction intended to reflect its profitability.


     o    If Senior  Housing fails to distribute  for any calendar year at least
          the sum of 85% of its REIT ordinary  income for that year,  95% of its
          REIT  capital  gain net income for that  year,  and any  undistributed
          taxable income from prior  periods,  it will be subject to a 4% excise
          tax on the  excess  of the  required  distribution  over  the  amounts
          actually distributed.

     o    If  Senior  Housing   acquires  an  asset  from  a  corporation  in  a
          transaction in which its basis in the asset is determined by reference
          to the  basis of the  asset  in the  hands of a  present  or  former C
          corporation, and if it subsequently recognizes gain on the disposition
          of this asset  during the  ten-year  period  beginning  on the date on
          which the asset ceased to be owned by the C  corporation,  then Senior
          Housing will pay tax at the highest regular  corporate tax rate, which
          is currently 35%, on the lesser of the excess of the fair market value
          of the asset over the C  corporation's  basis in the asset on the date
          the  asset  ceased  to be  owned  by the C  corporation,  or the  gain
          recognized in the disposition.


     If Senior Housing invests in properties in foreign  countries,  its profits
from these  investments  will generally be subject to tax in the countries where
those properties are located. The nature and amount of this taxation will depend
on the laws of the countries where the properties are located. If Senior Housing
operates as it currently intends,  then it will distribute its taxable income to
its shareholders  and it will not pay federal  corporate income tax, and thus it
generally  cannot  recover  the cost of foreign  taxes  imposed  on its  foreign
investments  by  claiming  foreign tax  credits  against its federal  income tax
liability.  Nor can Senior Housing pass through to its  shareholders any foreign
tax credits.

     If Senior Housing fails to qualify for federal income taxation as a REIT in
any taxable year, then it will be subject to federal taxes in the same manner as
an ordinary corporation.  Distributions to its shareholders in any year in which
it  fails  to  qualify  as a  REIT  will  not  be  deductible,  nor  will  these
distributions  be required to be made.  In that event,  to the extent of current
and  accumulated  earnings  and profits,  all  distributions  to Senior  Housing
shareholders  will be  taxable  as  ordinary  dividend  income,  and  subject to
limitations  in the Internal  Revenue  Code,  will be eligible for the dividends
received deduction for corporate recipients. Senior Housing would also generally
be  disqualified  from  federal  income  taxation as a REIT for the four taxable
years following disqualification. Failure to qualify for federal income taxation
as a REIT for even one year could result in Senior Housing incurring substantial
indebtedness  or  liquidating  substantial  investments  in  order  to  pay  the
resulting corporate-level taxes.

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<PAGE>

     General REIT  Qualification  Requirements.  Section  856(a) of the Internal
Revenue Code defines a REIT as a corporation, trust or association:

     (1)  that is managed by one or more trustees or directors;

     (2)  the beneficial  ownership of which is evidenced by transferable shares
          or by transferable certificates of beneficial interest;

     (3)  that  would  be  taxable,  but for  Sections  856  through  859 of the
          Internal Revenue Code, as an ordinary domestic corporation;

     (4)  that is  neither a  financial  institution  nor an  insurance  company
          subject to special provisions of the Internal Revenue Code;

     (5)  the beneficial ownership of which is held by 100 or more persons;

     (6)  that is not  "closely  held" as  defined  under the  personal  holding
          company stock ownership test, as described below; and

     (7)  that meets other tests regarding income, assets and distributions, all
          as described below.

Section 856(b) of the Internal Revenue Code provides that conditions (1) to (4),
inclusive,  must be met during the entire  taxable year and that  condition  (5)
must be met during at least 335 days of a taxable year of 12 months, or during a
pro rata part of a taxable year of less than 12 months. Section 856(h)(2) of the
Internal  Revenue Code provides that  conditions (5) and (6) need not be met for
Senior  Housing's 1999 taxable year, which taxable year commences on the date of
the spin-off.  Senior  Housing  believes that it will satisfy  conditions (1) to
(6), inclusive,  for its 1999 taxable year, and that it will continue to satisfy
those conditions in future taxable years. There can, however, be no assurance in
this regard.

     By reason of condition (6) above,  Senior Housing will fail to qualify as a
REIT for a  taxable  year if at any time  during  the last half of the year more
than 50% in value of its  outstanding  shares is owned directly or indirectly by
five or fewer  individuals.  To help comply with condition (6), Senior Housing's
declaration of trust contains  provisions  restricting  transfers of its shares.
Similarly,  for the purpose of HRPT maintaining its own  qualification as a REIT
under the Tax Code, HRPT's declaration of trust contains  comparable  provisions
that limit  concentrated  ownership of shares in HRPT.  In addition,  commencing
with its 1999 taxable year, if Senior Housing complies with applicable  Treasury
regulations for  ascertaining  the ownership of its outstanding  shares and does
not know,  or  exercising  reasonable  diligence  would not have known,  that it
failed condition (6), then it will be treated as satisfying condition (6). Also,
Senior Housing's  failure to comply with these applicable  Treasury  regulations
for ascertaining  ownership of its outstanding shares may result in a penalty of
$25,000,  or $50,000 for  intentional  violations.  Accordingly,  Senior Housing
intends to comply with these Treasury regulations,  and to request annually from
record holders of significant  percentages of its shares  information  regarding
the ownership of its shares.  Under Senior  Housing's  declaration of trust, its
shareholders are required to respond to these requests for information.

     The rule that an entity  will fail to qualify as a REIT for a taxable  year
if at any time  during  the last  half of the year more than 50% in value of its
outstanding  shares is owned directly or indirectly by five or fewer individuals
is relaxed in the case of pension  trusts owning  shares in a REIT.  Shares in a
REIT held by a pension trust are treated as held directly by the pension trust's
beneficiaries  in proportion to their actuarial  interests in the pension trust.
Consequently,  five or fewer  pension  trusts  could  own  more  than 50% of the
interests in an entity  without  jeopardizing  that entity's  federal income tax
qualification  as  a  REIT.  However,  as  discussed  below,  if  a  REIT  is  a
"pension-held  REIT,"  each  pension  trust  owning  more than 10% of the REIT's
shares by value  generally will be taxed on a portion of the dividends  received
from the REIT, based on the ratio of

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<PAGE>

     (1)  the REIT's gross income for the year that would be unrelated  trade or
          business income if the REIT were a qualified pension trust, to

     (2)  the REIT's total gross income for the year.

     Senior  Housing's  Subsidiaries  and  Partnerships.  Section  856(i) of the
Internal  Revenue Code provides that any corporation 100% of whose stock is held
by a REIT is a qualified REIT  subsidiary and shall not be treated as a separate
corporation.  The assets,  liabilities and items of income, deduction and credit
of a  qualified  REIT  subsidiary  are  treated as the  REIT's.  Senior  Housing
believes  that each of its direct and indirect  wholly owned  subsidiaries  will
either be a qualified  REIT  subsidiary  within the meaning of Section 856(i) of
the Internal Revenue Code, or a noncorporate  entity that for federal income tax
purposes  is not treated as separate  from its owner  under  regulations  issued
under  Section  7701 of the Internal  Revenue  Code.  Thus,  in applying all the
federal income tax REIT  qualification  requirements  described in this summary,
Senior Housing's direct and indirect wholly owned subsidiaries are ignored,  and
all assets,  liabilities and items of income, deduction and credit of its direct
and indirect wholly owned subsidiaries are treated as Senior Housing's.

     Senior  Housing  may invest in real estate  through one or more  limited or
general  partnerships  or  limited  liability  companies  that  are  treated  as
partnerships  for federal  income tax purposes.  In the case of a REIT that is a
partner in a partnership,  regulations  under the Internal  Revenue Code provide
that, for purposes of the REIT qualification  requirements  regarding income and
assets discussed below, the REIT is deemed to own its proportionate share of the
assets of the  partnership  corresponding  to the REIT's  proportionate  capital
interest  in the  partnership  and is deemed to be entitled to the income of the
partnership  attributable to this  proportionate  share. In addition,  for these
purposes,  the  character  of the  assets  and gross  income of the  partnership
generally  retain  the same  character  in the hands of the  REIT.  Accordingly,
Senior Housing's  proportionate share of the assets,  liabilities,  and items of
income  of each  partnership  in which it is a  partner  are  treated  as Senior
Housing's for purposes of the income tests and asset tests  discussed  below. In
contrast,  for purposes of the distribution  requirement discussed below, Senior
Housing  must  take into  account  as a partner  its  distributive  share of the
partnership's  income as determined  under the general  federal income tax rules
governing  partners  and  partnerships  under  Sections  701  through 777 of the
Internal Revenue Code.

     Income Tests. There are two gross income  requirements for qualification as
a REIT under the Internal Revenue Code:

     o    First, at least 75% of Senior Housing's gross income,  excluding gross
          income from sales or other dispositions of property held primarily for
          sale,  must be derived  from  investments  relating to real  property,
          including  "rents from real  property" as defined under Section 856 of
          the Internal  Revenue Code,  mortgages on real property,  or shares in
          other REITs.  When Senior Housing receives new capital in exchange for
          its  shares  or in a public  offering  of  five-year  or  longer  debt
          instruments,  income attributable to the temporary  investment of this
          new  capital in stock or a debt  instrument,  if  received  or accrued
          within one year of its receipt of the new capital,  is generally  also
          qualifying income under the 75% test.

     o    Second, at least 95% of Senior Housing's gross income, excluding gross
          income from sales or other dispositions of property held primarily for
          sale,  must be derived from a  combination  of items of real  property
          income that satisfy the 75% test described above, dividends, interest,
          payments under interest rate swap or cap agreements,  options, futures
          contracts,  forward rate agreements, or similar financial instruments,
          and gains from the sale or disposition of stock,  securities,  or real
          property.


For  purposes  of  these  two  requirements,   income  derived  from  a  "shared
appreciation  provision"  in a  mortgage  loan  is  generally  treated  as  gain
recognized  on the sale of the  property  to which it relates.  Although  Senior
Housing  will use its best  efforts to ensure that the income  generated  by its
investments  will be of a type which satisfies both the 75% and 95% gross income
tests, there can be no assurance in this regard.

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<PAGE>

     In order to qualify as "rents from real property"  under Section 856 of the
Internal Revenue Code, several requirements must be met:

     o    First, the amount of rent received  generally must not be based on the
          income or  profits  of any  person,  but may be based on  receipts  or
          sales.


     o    Second,  rents  do not  qualify  if the  REIT  owns 10% or more of the
          tenant,  whether directly or after  application of attribution  rules.
          While  Senior  Housing  intends not to lease  property to any party if
          rents  from  that  property  would  not  qualify  as rents  from  real
          property,  application  of the 10%  ownership  rule is dependent  upon
          complex  attribution rules and circumstances that may be beyond Senior
          Housing's  control.   For  example,   an  unaffiliated  third  party's
          ownership  directly  or by  attribution  of  10%  or  more  of  Senior
          Housing's  shares, or 10% or more of HRPT's shares for so long as HRPT
          owns  10% or more  of  Senior  Housing,  as well as 10% or more of the
          stock of a Senior Housing lessee,  would result in that lessee's rents
          not  qualifying  as  rents  from  real  property.   Senior   Housing's
          declaration of trust  disallows  transfers or purported  acquisitions,
          directly  or by  attribution,  of its  shares  that  could  result  in
          disqualification as a REIT under the Internal Revenue Code and permits
          its  trustees  to  repurchase  the shares to the extent  necessary  to
          maintain Senior  Housing's status as a REIT under the Internal Revenue
          Code.  Similarly,   for  the  purpose  of  HRPT  maintaining  its  own
          qualification  as a REIT  under  the  Internal  Revenue  Code,  HRPT's
          declaration  of  trust  contains   provisions   that  generally  limit
          concentrated ownership of HRPT's shares to 8.5% or below. Furthermore,
          the transaction agreement provides that HRPT will not take any actions
          that may  jeopardize  Senior  Housing's REIT status under the Internal
          Revenue  Code.  Nevertheless,  there can be no  assurance  that  these
          provisions in Senior  Housing's and HRPT's  declarations  of trust and
          the  provisions  of the  transaction  agreement  will be  effective to
          prevent  REIT  status  under the  Internal  Revenue  Code  from  being
          jeopardized  under the 10% lessee affiliate rule.  Furthermore,  there
          can be no  assurance  that Senior  Housing will be able to monitor and
          enforce these  restrictions,  nor will Senior  Housing's  shareholders
          necessarily  be aware of ownership of shares  attributed to them under
          the Internal Revenue Code's attribution rules.


     o    Third,  in order for rents to qualify,  Senior Housing  generally must
          not manage the  property or furnish or render  services to the tenants
          of the property,  except through an independent  contractor  from whom
          Senior Housing  derives no income.  There is an exception to this rule
          permitting  a REIT to perform  customary  tenant  services of the sort
          which a tax-exempt organization could perform without being considered
          in  receipt  of  "unrelated  business  taxable  income"  as defined in
          Section  512(b)(3) of the Internal  Revenue  Code.  In addition,  a de
          minimis amount of noncustomary  services will not disqualify income as
          "rents from real  property" so long as the value of the  impermissible
          services does not exceed 1% of the gross income from the property.

     o    Fourth, if rent attributable to personal property leased in connection
          with a  lease  of real  property  is 15% or  less  of the  total  rent
          received  under the  lease,  then the rent  attributable  to  personal
          property  will  qualify  as  rents  from  real  property;  if this 15%
          threshold is exceeded, the rent attributable to personal property will
          not so qualify.  The portion of rental income treated as  attributable
          to personal  property is determined  according to the ratio of the tax
          basis of the personal  property to the total tax basis of the real and
          personal property which is rented.

Senior Housing believes that all or substantially  all its rents will qualify as
rents from real  property for  purposes of Section 856 of the  Internal  Revenue
Code.

     In order to qualify as mortgage  interest on real  property for purposes of
the 75% test, interest must derive from a mortgage loan secured by real property
with a fair market value at least equal to the amount of the loan. If the amount
of the loan  exceeds the fair market  value of the real  property,  the interest
will be treated as interest on a mortgage  loan in a ratio equal to the ratio of
the fair market  value of the real  property to the total amount of the mortgage
loan.

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<PAGE>

     Any gain Senior Housing  realizes on the sale of property held as inventory
or other property held primarily for sale to customers in the ordinary course of
business will be treated as income from a prohibited transaction that is subject
to a penalty tax at a 100% rate.  This  prohibited  transaction  income also may
have an adverse effect upon Senior Housing's  ability to satisfy the 75% and 95%
gross  income  tests for  federal  income tax  qualification  as a REIT.  Senior
Housing  cannot  provide   assurances  as  to  whether  or  not  the  IRS  might
successfully  assert that one or more of its dispositions is subject to the 100%
penalty tax. However, Senior Housing believes that any occasional disposition of
assets that it might make will not be subject to the 100% penalty  tax,  because
it intends to:


     o    own  its  assets  for  investment  with a  view  to  long-term  income
          production and capital appreciation;

     o    engage  in the  business  of  developing,  owning  and  operating  its
          existing  properties and acquiring,  developing,  owning and operating
          new properties; and

     o    make  occasional  dispositions  of  its  assets  consistent  with  its
          long-term investment objectives.


     If  Senior  Housing  fails to  satisfy  one or both of the 75% or 95% gross
income tests for any taxable  year,  it may  nevertheless  qualify as a REIT for
that year if:


     o    its failure to meet the test was due to  reasonable  cause and not due
          to willful neglect;

     o    it reports  the nature and amount of each item of its income  included
          in the 75% or 95%  gross  income  tests  for  that  taxable  year on a
          schedule attached to its tax return; and

     o    any  incorrect  information  on the schedule was not due to fraud with
          intent to evade tax.


It is impossible to state whether in all  circumstances  Senior Housing would be
entitled  to the  benefit  of this  relief  provision  for the 75% and 95% gross
income tests.  Even if this relief  provision did apply,  a special tax equal to
100% is imposed  upon the greater of the amount by which Senior  Housing  failed
the 75% test or the 95% test,  multiplied by a fraction  intended to reflect its
profitability.

     Asset  Tests.  At the close of each quarter of each  taxable  year,  Senior
Housing must also satisfy three  percentage  tests relating to the nature of its
assets:


     o    First, at least 75% of the value of Senior Housing's total assets must
          consist of real estate  assets,  cash and cash items,  shares in other
          REITs, government securities,  and stock or debt instruments purchased
          with  proceeds  of a stock  offering or an offering of its debt with a
          term  of at  least  five  years,  but  only  for the  one-year  period
          commencing with its receipt of the offering proceeds.

     o    Second,  not more than 25% of Senior  Housing's  total  assets  may be
          represented  by  securities  other  than those  securities  that count
          favorably toward the preceding 75% asset test.

     o    Third, of the  investments  included in the preceding 25% asset class,
          the value of any one issuer's  securities that Senior Housing owns may
          not exceed 5% of the value of its total assets, and Senior Housing may
          not  own  more  than  10%  of  any  one  issuer's  outstanding  voting
          securities.

When a failure to satisfy the above asset tests results from an  acquisition  of
securities  or other  property  during a quarter,  the  failure  can be cured by
disposition of sufficient nonqualifying assets within 30 days after the close of
that quarter.  Senior  Housing  intends to maintain  records of the value of its
assets to document its compliance with the above three asset tests,  and to take
actions as may be required  to cure any  failure to satisfy the tests  within 30
days after the close of any quarter.

                                       89
<PAGE>


     Annual  Distribution  Requirements.  In order to qualify for  taxation as a
REIT under the Internal Revenue Code,  Senior Housing is required to make annual
distributions other than capital gain dividends to its shareholders in an amount
at least equal to the excess of:


     (A)  the sum of 95% of  Senior  Housing's  "real  estate  investment  trust
          taxable  income,"  as defined in Section 857 of the  Internal  Revenue
          Code, but computed  without regard to the dividends paid deduction and
          net capital gain, and 95% of Senior Housing's net income after tax, if
          any, from property received in foreclosure, over


     (B)  the sum of Senior Housing's  qualifying noncash income,  e.g., imputed
          rental  income or income from  transactions  inadvertently  failing to
          qualify as like-kind exchanges.

These distributions must be paid in the taxable year to which they relate, or in
the following  taxable year if declared  before Senior  Housing timely files its
tax  return  for the  earlier  taxable  year and if paid on or before  the first
regular  distribution  payment  after that  declaration.  Dividends  declared in
October,  November,  or December and paid during the  following  January will be
treated  as having  been  both paid and  received  on  December  31 of the prior
taxable  year.  A  distribution  which is not pro rata  within a class of Senior
Housing's  beneficial  interests  entitled  to a  distribution,  or which is not
consistent with the rights to distributions  among Senior  Housing's  classes of
beneficial  interests,  is a  preferential  distribution  that is not taken into
consideration for purposes of the distribution requirements, and accordingly the
payment of a preferential  distribution could affect Senior Housing's ability to
meet  the  distribution  requirements.  Taking  into  account  Senior  Housing's
distribution  policies,  including any dividend  reinvestment plan it may adopt,
Senior Housing expects that it will not make any preferential distributions. The
distribution requirements may be waived by the IRS if a REIT establishes that it
failed  to meet  them by reason  of  distributions  previously  made to meet the
requirements  of the 4% excise tax  discussed  below.  To the extent that Senior
Housing  does not  distribute  all of its net  capital  gain and all of its real
estate investment trust taxable income,  as adjusted,  it will be subject to tax
on undistributed amounts.

     In  addition,  Senior  Housing  will be  subject  to a 4% excise tax to the
extent it fails within a calendar  year to make  required  distributions  to its
shareholders  of 85% of its  ordinary  income  and 95% of its  capital  gain net
income plus the excess,  if any, of the "grossed up required  distribution"  for
the preceding  calendar  year over the amount  treated as  distributed  for that
preceding  calendar  year.  For this  purpose,  the term  "grossed  up  required
distribution"  for any  calendar  year is the sum of  Senior  Housing's  taxable
income for the calendar year without  regard to the deduction for dividends paid
and all  amounts  from  earlier  years  that  are not  treated  as  having  been
distributed under the provision.

     If Senior  Housing does not have enough cash or other liquid assets to meet
the 95% distribution  requirements,  it may find it necessary to arrange for new
debt or equity  financing to provide funds for required  distributions,  or else
its REIT status for federal  income tax purposes  could be  jeopardized.  Senior
Housing can provide no assurance  that  financing  would be available  for these
purposes on favorable terms.

     If Senior Housing fails to distribute sufficient dividends for any year, it
may be  able to  rectify  this  failure  by  paying  "deficiency  dividends"  to
shareholders  in a later year.  These  deficiency  dividends  may be included in
Senior  Housing's  deduction  for dividends  paid for the earlier  year,  but an
interest charge would be imposed upon it for the delay in distribution. Although
Senior  Housing  may be able to avoid  being  taxed on  amounts  distributed  as
deficiency  dividends,  it will  remain  liable for the 4% excise tax  discussed
above.

     Depreciation  and Federal  Income Tax Treatment of Leases.  For  properties
purchased after the spin-off,  Senior Housing's initial tax basis will generally
be its  acquisition  cost.  Senior  Housing will  generally  depreciate its real
property on a straight-line  basis over 40 years and its personal  property,  if
any, over 12 years.  These  depreciation  schedules may vary for properties that
Senior Housing acquires through tax-free or carryover basis acquisitions.

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<PAGE>


     Senior  Housing's  initial  tax bases and  depreciation  schedules  for its
assets at the time of the spin-off will depend upon whether the deemed  exchange
that  results  from the  spin-off is an  exchange  under  Section  351(a) of the
Internal Revenue Code.  Assuming Section 351(a)  treatment,  Senior Housing will
carry over HRPT's tax basis and  depreciation  schedule  in each Senior  Housing
asset,  and to the extent that HRPT recognizes gain on a Senior Housing asset in
the deemed exchange, Senior Housing will have additional tax basis in that asset
which it will  depreciate  as described  above for newly  purchased  assets.  In
contrast,  if Section 351(a)  treatment  does not apply to the deemed  exchange,
then Senior  Housing will be treated as though it acquired all its assets at the
time of the spin-off in a fully taxable acquisition, thereby acquiring aggregate
tax bases in these assets equal to the aggregate  amount realized by HRPT in the
deemed exchange, and Senior Housing will depreciate these tax bases as described
above for newly  purchased  assets.  Senior  Housing  believes,  and  Sullivan &
Worcester  LLP has opined that it is likely that the deemed  exchange will be an
exchange  under  Section  351(a),  and Senior  Housing  will perform all its tax
reporting  accordingly.  Senior  Housing  may be  required  to amend  these  tax
reports,  including  those  sent to its  shareholders,  if the IRS  successfully
challenges  its position that the deemed  exchange is an exchange  under Section
351(a).  Senior  Housing  intends  to  comply  with  the 95%  REIT  distribution
requirements in 1999 and future years  regardless of whether the deemed exchange
is an exchange under Section 351(a).


     Senior  Housing  will be  entitled  to  depreciation  deductions  from  its
facilities only if it is treated for federal income tax purposes as the owner of
the facilities.  This means that the leases of the facilities must be classified
for  federal  income  tax  purposes  as true  leases,  rather  than as  sales or
financing  arrangements,  and Senior  Housing  believes  this to be the case. In
addition, in the case of sale-leaseback arrangements,  the IRS could assert that
Senior  Housing  realized  prepaid  rental income in the year of purchase to the
extent that the value of a leased  property  exceeds the purchase price for that
property. Because of the lack of clear precedent,  Senior Housing cannot provide
assurances  as to whether the IRS might  successfully  assert the  existence  of
prepaid rental income in any of its sale-leaseback transactions.

     Additionally,  Section 467 of the Internal  Revenue  Code,  which  concerns
leases with  increasing  rents,  may apply to those of Senior  Housing's  leases
which provide for rents that  increase from one period to the next.  Section 467
of  the  Internal  Revenue  Code  provides  that  in  the  case  of a  so-called
"disqualified  leaseback  agreement" rental income must be accrued at a constant
rate.  Where constant rent accrual is required,  Senior Housing could  recognize
rental  income from a lease in excess of cash rents and, as a result,  encounter
difficulty in meeting the 95% distribution  requirement.  Disqualified leaseback
agreements  include  leaseback   transactions  where  a  principal  purpose  for
providing increasing rent under the agreement is the avoidance of federal income
tax. Recently issued Treasury regulations provide that rents will not be treated
as increasing  for tax avoidance  purposes  where the increases are based upon a
fixed percentage of lessee receipts.  Therefore,  the additional rent provisions
in  Senior  Housing's  leases  that are  based on a fixed  percentage  of lessee
receipts  generally  should  not cause the leases to be  disqualified  leaseback
agreements under Section 467.

     Taxation of Shareholders. As long as Senior Housing qualifies as a REIT for
federal income tax purposes,  a  distribution  to its  shareholders  that Senior
Housing  does not  designate as a capital  gain  dividend  will be treated as an
ordinary  income  dividend  to the  extent  that it is made  out of  current  or
accumulated  earnings and profits.  Distributions  made out of Senior  Housing's
current or  accumulated  earnings  and  profits  that  Senior  Housing  properly
designates as capital gain dividends  will be taxed as long-term  capital gains,
as discussed below, to the extent they do not exceed actual net capital gain for
the taxable year. However, corporate shareholders may be required to treat up to
20% of any capital gain  dividend as ordinary  income  under  Section 291 of the
Internal  Revenue  Code.  In  addition,  Senior  Housing may elect to retain net
capital gain income and treat it as constructively distributed. In that case,

     (1)  Senior  Housing will be taxed at regular  corporate  capital gains tax
          rates on retained amounts,

     (2)  each shareholder will be taxed on its designated  proportionate  share
          of Senior  Housing's  retained net capital gains as though that amount
          were distributed and designated a capital gain dividend,

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<PAGE>

     (3) each shareholder will receive a credit for its designated proportionate
         share of the tax that Senior Housing pays,

     (4) each shareholder will increase its adjusted basis in its Senior Housing
         shares by the excess of the amount of its proportionate  share of these
         retained  net capital  gains over its  proportionate  share of this tax
         that Senior Housing pays, and

     (5) both  Senior   Housing  and  its  corporate   shareholders   will  make
         commensurate  adjustments in their respective  earnings and profits for
         federal income tax purposes.

If Senior  Housing  elects to retain its net capital gains in this  fashion,  it
will notify its  shareholders  of the  relevant tax  information  within 60 days
after the close of the affected  taxable year.  For  noncorporate  shareholders,
long-term  capital  gains are  generally  taxed at maximum  rates of 20% or 25%,
depending  upon the type of  property  disposed  of and the  previously  claimed
depreciation with respect to this property.

     Distributions in excess of current or accumulated earnings and profits will
not be  taxable  to a  shareholder  to the  extent  that they do not  exceed the
shareholder's  adjusted basis in the  shareholder's  Senior Housing shares,  but
will reduce the  shareholder's  basis in those shares.  To the extent that these
excess distributions  exceed the adjusted basis of a shareholder's  shares, they
will be included in income as capital gain,  with long-term gain generally taxed
to  noncorporate  shareholders  at a maximum  rate of 20%.  No  shareholder  may
include on his federal  income tax return any of Senior  Housing's net operating
losses or any of its capital losses.

     Dividends that Senior Housing declares in October,  November or December of
a taxable  year to  shareholders  of record  on a date in those  months  will be
deemed to have been  received by  shareholders  on  December 31 of that  taxable
year, provided Senior Housing actually pays these dividends during the following
January.  Also,  items that are treated  differently for regular and alternative
minimum tax  purposes are to be  allocated  between a REIT and its  shareholders
under Treasury regulations which are to be prescribed. It is possible that these
Treasury regulations will require tax preference items to be allocated to Senior
Housing  shareholders with respect to any accelerated  depreciation or other tax
preference items that Senior Housing claims.

     The sale or exchange of Senior Housing shares will result in recognition of
gain or loss in an amount equal to the  difference  between the amount  realized
and the shareholder's adjusted basis in the shares sold or exchanged.  This gain
or loss will be capital gain or loss, and will be long-term capital gain or loss
if the shareholder's holding period in the shares exceeds one year. In addition,
any loss upon a sale or exchange of Senior Housing shares held for six months or
less will  generally  be treated as a  long-term  capital  loss to the extent of
Senior Housing long-term capital gain dividends during the holding period.

     Noncorporate  shareholders who borrow funds to finance their acquisition of
Senior Housing  shares could be limited in the amount of deductions  allowed for
the interest paid on the  indebtedness  incurred.  Under  Section  163(d) of the
Internal  Revenue  Code,  interest paid or accrued on  indebtedness  incurred or
continued  to  purchase  or carry  property  held for  investment  is  generally
deductible  only to the  extent  of the  investor's  net  investment  income.  A
shareholder's  net  investment  income will  include  ordinary  income  dividend
distributions  received from Senior Housing and, if an  appropriate  election is
made by the  shareholder,  capital gain  dividend  distributions  received  from
Senior Housing;  however,  distributions  treated as a nontaxable  return of the
shareholder's  basis  will not  enter  into the  computation  of net  investment
income.

     Taxation of Tax-Exempt  Shareholders.  In Revenue  Ruling  66-106,  the IRS
ruled that  amounts  distributed  by a REIT to a tax-exempt  employees'  pension
trust did not constitute  "unrelated  business  taxable income," even though the
REIT may  have  financed  some its  activities  with  acquisition  indebtedness.
Although revenue rulings are interpretive in nature and subject to revocation or
modification  by the IRS,  based upon the  analysis  and  conclusion  of Revenue
Ruling 66-106,  Senior  Housing's  distributions  made to shareholders  that are
tax-exempt pension plans,  individual  retirement accounts,  or other qualifying
tax-exempt  entities should not

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<PAGE>

constitute  unrelated  business  taxable  income,  unless  the  shareholder  has
financed its acquisition of its shares with  "acquisition  indebtedness"  within
the meaning of the Internal Revenue Code.

     Special  rules apply to  tax-exempt  pension  trusts,  including  so-called
401(k) plans but excluding individual  retirement accounts or government pension
plans,  that own more  than  10% by value of a  "pension-held  REIT" at any time
during a taxable  year.  The pension trust may be required to treat a percentage
of all  dividends  received  from  the  pension-held  REIT  during  the  year as
unrelated business taxable income. This percentage is equal to the ratio of

     (1)  the  pension-held  REIT's  gross  income  derived  from the conduct of
          unrelated trades or businesses, determined as if the pension-held REIT
          were a tax-exempt  pension fund, less direct expenses  related to that
          income, to

     (2)  the  pension-held  REIT's gross  income from all sources,  less direct
          expenses related to that income,


except that this percentage shall be deemed to be zero unless it would otherwise
equal or exceed 5%. A REIT is a pension-held REIT if:


     o    the REIT is "predominantly held" by tax-exempt pension trusts, and


     o    the REIT would  otherwise fail to satisfy the "closely held" ownership
          requirement  discussed  above if the stock or beneficial  interests in
          the REIT held by  tax-exempt  pension  trusts  were  viewed as held by
          tax-exempt   pension   trusts   rather   than  by   their   respective
          beneficiaries.


A REIT is  predominantly  held by  tax-exempt  pension  trusts  if at least  one
tax-exempt  pension  trust  owns more than 25% by value of the  REIT's  stock or
beneficial  interests,  or if one or more tax-exempt pension trusts, each owning
more than 10% by value of the REIT's stock or beneficial  interests,  own in the
aggregate  more than 50% by value of the REIT's stock or  beneficial  interests.
Because of the restrictions in Senior  Housing's  declaration of trust regarding
the ownership  concentration  of its shares,  and because of the restrictions in
HRPT's  declaration  of trust  regarding the ownership  concentration  of HRPT's
shares,  Senior  Housing  believes  that it  will  not be a  pension-held  REIT.
However,  because  Senior  Housing's  shares and HRPT's  shares will be publicly
traded,  Senior Housing cannot  completely  control whether or not it is or will
become a pension-held REIT.


     Taxation of  Non-U.S.  Persons.  The rules  governing  the  federal  income
taxation of non-U.S.  persons  are  complex,  and the  following  discussion  is
intended only as a summary of these rules. If you are a non-U.S. person, we urge
you to consult  with your own tax  advisor to  determine  the impact of federal,
state,  local,  and foreign tax laws,  including any tax return filing and other
reporting  requirements,  with  respect  to your  investment  in Senior  Housing
shares.


     In general, a non-U.S. person will be subject to regular federal income tax
in the same manner as a U.S.  person with  respect to its  investment  in Senior
Housing  shares if that  investment is  effectively  connected with the non-U.S.
person's  conduct of a trade or business in the United  States.  In addition,  a
corporate non-U.S.  person that receives income that is or is deemed effectively
connected  with a trade or business in the United  States may also be subject to
the 30% branch profits tax under Section 884 of the Internal Revenue Code, which
is payable in addition to regular federal  corporate  income tax. The balance of
this  discussion on the federal income  taxation of non-U.S.  persons  addresses
only those  non-U.S.  persons whose  investment in Senior  Housing shares is not
effectively  connected  with the  conduct of a trade or  business  in the United
States.

     A  distribution  by  Senior  Housing  to a  non-U.S.  person  that  is  not
attributable  to gain from the sale or exchange of a United States real property
interest and that is not  designated  as a capital gain dividend will be treated
as an ordinary  income  dividend to the extent that it is made out of current or
accumulated  earnings and profits. A distribution of this type will generally be
subject to federal  income tax and  withholding at the rate of 30%, or the lower
rate that may be  specified  by a tax treaty if the  non-U.S.  person has in the
manner  prescribed

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<PAGE>

by the IRS demonstrated its entitlement to benefits under a tax treaty.  Because
Senior Housing cannot determine its current and accumulated earnings and profits
until the end of the taxable year,  withholding at the rate of 30% or applicable
lower treaty rate will be imposed on the gross amount of any  distribution  to a
non-U.S.  person that Senior Housing makes and does not designate a capital gain
dividend.  Notwithstanding this withholding on distributions in excess of Senior
Housing current and accumulated earnings and profits,  these distributions are a
nontaxable  return of capital to the extent that they do not exceed the non-U.S.
person's  adjusted basis in Senior Housing shares,  and the nontaxable return of
capital  will  reduce the  adjusted  basis in these  shares.  To the extent that
distributions  in excess of current and accumulated  earnings and profits exceed
the non-U.S. person's adjusted basis in Senior Housing shares, the distributions
will give rise to tax  liability  if the  non-U.S.  person  would  otherwise  be
subject  to tax on any gain  from  the sale or  exchange  of  these  shares,  as
discussed  below.  A non-U.S.  person may seek a refund of amounts  withheld  on
distributions  to him in excess  of Senior  Housing's  current  and  accumulated
earnings and profits, provided that the required information is furnished to the
IRS.

     For any year in which Senior  Housing  qualifies  as a REIT,  distributions
that are  attributable to gain from the sale or exchange of a United States real
property interest are taxed to a non-U.S.  person as if these distributions were
gains  effectively  connected  with a trade or  business  in the  United  States
conducted by the non-U.S. person.  Accordingly,  a non-U.S. person will be taxed
on these amounts at the normal capital gain rates  applicable to a U.S.  person,
subject to any applicable  alternative  minimum tax and to a special alternative
minimum tax in the case of nonresident alien  individuals;  the non-U.S.  person
will be required to file a United  States  federal  income tax return  reporting
these amounts, even if applicable withholding is imposed as described below; and
corporate non-U.S.  persons may owe the 30% branch profits tax under Section 884
of the Internal Revenue Code in respect of these amounts. Senior Housing will be
required to withhold from  distributions to non-U.S.  persons,  and remit to the
IRS, 35% of the maximum amount of any distribution that could be designated as a
capital gain dividend.  In addition,  for purposes of this withholding  rule, if
Senior Housing  designates prior  distributions as capital gain dividends,  then
subsequent  distributions up to the amount of the designated prior distributions
will be treated as capital  gain  dividends.  The amount of any tax  withheld is
creditable against the non-U.S.  person's federal income tax liability,  and any
amount of tax withheld in excess of that tax liability may be refunded  provided
that an appropriate claim for refund is filed with the IRS.

     Tax  treaties  may reduce the  withholding  obligations  on Senior  Housing
distributions.   Under  some  treaties,   however,  rates  below  30%  generally
applicable to ordinary income dividends from United States  corporations may not
apply to ordinary income dividends from a REIT. If the amount of tax withheld by
Senior Housing with respect to a distribution  to a non-U.S.  person exceeds the
shareholder's federal income tax liability with respect to the distribution, the
non-U.S.  person  may file  for a refund  of the  excess  from the IRS.  In this
regard,  note  that the 35%  withholding  tax  rate on  capital  gain  dividends
corresponds  to the maximum  income tax rate  applicable  to corporate  non-U.S.
persons  but is  higher  than the 20% and 25%  maximum  rates on  capital  gains
generally applicable to noncorporate non-U.S. persons.  Generally effective with
respect to distributions paid after December 31, 2000, new Treasury  regulations
alter the  information  reporting  and backup  withholding  rules  applicable to
non-U.S.  persons and  provide  presumptions  under  which a non-U.S.  person is
subject to backup withholding and information  reporting until Senior Housing or
the applicable  withholding agent receives certification from the shareholder of
its non-U.S. person status. In some instances,  these certification requirements
are more detailed and more involved than those applicable under current Treasury
regulations.  The  new  Treasury  regulations  also  provide  special  rules  to
determine  whether,  for  purposes of  determining  the  applicability  of a tax
treaty,  Senior Housing's  distributions to a non-U.S.  person that is an entity
should be treated as paid to the entity or to those  owning an  interest in that
entity,  and whether the entity or its owners are entitled to benefits under the
tax  treaty.  The  general  thrust  of the new  Treasury  regulations  and their
proposed effective date is to encourage non-U.S.  persons and withholding agents
to use as soon as  possible  the new IRS  Forms  W-8  series,  rather  than  the
predecessor  IRS Forms W-8,  1001,  and 4224,  and to require use of the new IRS
Forms W-8 series for payments made after December 31, 2000.


     If Senior Housing  shares are not "United  States real property  interests"
within the  meaning of Section  897 of the  Internal  Revenue  Code,  a non-U.S.
person's gain on sale of these shares  generally  will not be subject to federal
income taxation,  except that a nonresident  alien individual who was present in
the United  States for 183

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<PAGE>

days or more during the taxable  year will be subject to a 30% tax on this gain.
Senior Housing shares will not constitute a United States real property interest
if Senior Housing is a "domestically controlled REIT." A domestically controlled
REIT is a REIT in which at all times during the preceding  five-year period less
than 50% in value of its  shares  is held  directly  or  indirectly  by  foreign
persons.  Senior Housing believes that it will be a domestically controlled REIT
and thus a non-U.S.  person's  gain on sale of its shares will not be subject to
federal income taxation.  However, because these shares will be publicly traded,
and because the shares of HRPT are publicly  traded,  Senior Housing can provide
no assurance that it will be a domestically  controlled  REIT. If Senior Housing
is not a  domestically  controlled  REIT,  a non-U.S.  person's  gain on sale of
Senior Housing  shares will not be subject to federal income  taxation as a sale
of a United States real property interest, if that class of shares is "regularly
traded,"  as defined  by  applicable  Treasury  regulations,  on an  established
securities market like the New York Stock Exchange, and the non-U.S.  person has
at all times during the  preceding  five years owned 5% or less by value of that
class of shares.  If the gain on the sale of Senior  Housing shares were subject
to federal income taxation, the non-U.S. person will generally be subject to the
same  treatment as a U.S.  person with respect to its gain,  will be required to
file a United States federal  income tax return  reporting that gain, and in the
case of corporate  non-U.S.  persons might owe branch  profits tax under Section
884 of the Internal  Revenue Code. In any event,  a purchaser of Senior  Housing
shares from a non-U.S.  person will not be required to withhold on the  purchase
price if the purchased shares are regularly traded on an established  securities
market or if Senior Housing is a domestically  controlled REIT.  Otherwise,  the
purchaser  of Senior  Housing  shares may be  required  to  withhold  10% of the
purchase price paid to the non-U.S.  person and to remit the withheld  amount to
the IRS.


Backup Withholding and Information Reporting

     Information  reporting and backup withholding may apply to distributions or
proceeds paid to HRPT and Senior Housing  shareholders  under the  circumstances
discussed  below.  Because the spin-off of Senior  Housing  shares is an in-kind
distribution on HRPT shares, we or other applicable withholding agents will have
to collect any applicable backup  withholding by reducing to cash for remittance
to the IRS a  sufficient  portion of the  Senior  Housing  shares  that the HRPT
shareholder  would otherwise  receive,  and the HRPT  shareholder  will bear the
brokerage or other costs for this withholding procedure.  Amounts withheld under
backup  withholding  are generally not an additional  tax and may be refunded or
credited against the REIT shareholder's  federal income tax liability,  provided
that it furnishes the required information to the IRS.

     A U.S.  person will be subject to backup  withholding at a 31% rate when it
receives  distributions  on HRPT or Senior  Housing  shares or proceeds upon the
sale,  exchange,  redemption,  retirement or other disposition of HRPT or Senior
Housing  shares,  unless the U.S.  person  properly  executes under penalties of
perjury an IRS Form W-9 or substantially similar form that:

     o    provides the U.S. person's correct taxpayer identification number; and

     o    certifies  that the U.S.  person is  exempt  from  backup  withholding
          because it is a corporation or come within another exempt category, it
          has  not  been  notified  by the  IRS  that it is  subject  to  backup
          withholding,  or it has been  notified by the IRS that it is no longer
          subject to backup withholding.

If the U.S. person does not provide its correct taxpayer  identification  number
on the  IRS  Form  W-9 or  substantially  similar  form,  it may be  subject  to
penalties imposed by the IRS and the REIT may also have to withhold a portion of
any  capital  gain  distributions  paid  to  it.  Unless  the  U.S.  person  has
established on a properly  executed IRS Form W-9 or  substantially  similar form
that it is a corporation or comes within another exempt category,  distributions
on HRPT or Senior  Housing  shares paid to it during the calendar  year, and the
amount of tax withheld if any, will be reported to it and to the IRS.

     Distributions on HRPT or Senior Housing shares to a non-U.S.  person during
each calendar  year,  and the amount of tax withheld if any,  will  generally be
reported  to the  non-U.S.  person and to the IRS.  This  information  reporting
requirement  applies  regardless  of whether the  non-U.S.  person is subject to
withholding  on  distributions  on HRPT or Senior  Housing shares or whether the
withholding  was  reduced or  eliminated  by

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<PAGE>

an applicable tax treaty. Also,  distributions paid to a non-U.S. person on HRPT
or Senior  Housing  shares may be subject to backup  withholding  at a 31% rate,
unless the non-U.S.  person properly certifies its non-U.S.  person status on an
IRS  Form W-8 or  substantially  similar  form in the  manner  described  above.
Similarly,  information  reporting and 31% backup  withholding will not apply to
proceeds  a  non-U.S.  person  receives  upon the  sale,  exchange,  redemption,
retirement  or  other  disposition  of HRPT or  Senior  Housing  shares,  if the
non-U.S. person properly certifies its non-U.S. person status on an IRS Form W-8
or  substantially  similar form. Even without having executed an IRS Form W-8 or
substantially similar form, however, in some cases information reporting and 31%
backup  withholding  will not apply to proceeds that a non-U.S.  person receives
upon the sale, exchange, redemption,  retirement or other disposition of HRPT or
Senior Housing shares if the non-U.S.  person receives those proceeds  through a
broker's foreign office. As described above, new Treasury  regulations alter the
information  reporting  and backup  withholding  rules  applicable  to  non-U.S.
persons for payments  made after  December 31,  2000,  and in general  these new
Treasury  Regulations  replace  IRS Forms W-8,  1001,  and 4224 with the new IRS
Forms W-8 series. For a non-U.S.  person whose income and gain on HRPT or Senior
Housing shares is effectively  connected to the conduct of a United States trade
or business,  a slightly  different rule may apply to proceeds received upon the
sale,  exchange,  redemption,  retirement or other disposition of HRPT or Senior
Housing  shares.  Until  the  non-U.S.  person  complies  with the new  Treasury
regulations,  information  reporting and 31% backup withholding may apply in the
same  manner  as to a U.S.  person,  and thus the  non-U.S.  person  may have to
execute an IRS Form W-9 or  substantially  similar  form to  prevent  the backup
withholding.

Other Tax Consequences

     HRPT's, Senior Housing's and their respective  shareholders' federal income
tax  treatment  may be  modified by  legislative,  judicial,  or  administrative
actions at any time,  which  actions  may be  retroactive  in effect.  The rules
dealing  with  federal  income  taxation  are  constantly  under  review  by the
Congress, the IRS and the Treasury Department,  and statutory changes as well as
promulgation of new regulations,  revisions to existing regulations, and revised
interpretations of established  concepts occur frequently.  No prediction can be
made as to the likelihood of passage of new tax legislation or other  provisions
either directly or indirectly affecting HRPT, Senior Housing or their respective
shareholders.  Revisions in federal income tax laws and interpretations of these
laws could  adversely  affect the tax  consequences  of an investment in HRPT or
Senior Housing shares.  HRPT,  Senior Housing and their respective  shareholders
may  also be  subject  to  state or local  taxation  in  various  state or local
jurisdictions, including those in which HRPT, Senior Housing or their respective
shareholders  transact business or reside.  State and local tax consequences may
not be comparable to the federal income tax consequences discussed above.


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<PAGE>

ERISA Consequences for Senior Housing and its Shareholders

     Fiduciary  Obligations.  Fiduciaries of a pension,  profit-sharing or other
employee  benefit  plan  subject to Title I of the  Employee  Retirement  Income
Security Act of 1974, ERISA, must consider the following:

     o    whether  their  investment  in Senior  Housing  shares  satisfies  the
          diversification requirements of ERISA;

     o    whether the investment is prudent in light of possible  limitations on
          the marketability of Senior Housing shares;

     o    whether they have authority to acquire Senior Housing shares under the
          applicable governing instrument and Title I of ERISA; and

     o    whether the investment is otherwise  consistent  with their  fiduciary
          responsibilities.

     Trustees  and  other  fiduciaries  of an  ERISA  plan  may  incur  personal
liability  for any loss  suffered by the plan on account of a violation of their
fiduciary  responsibilities.  In addition, these fiduciaries may be subject to a
civil  penalty of up to 20% of any amount  recovered by the plan on account of a
violation.  Fiduciaries  of any IRA,  Roth IRA,  Keogh  Plan or other  qualified
retirement  plan not  subject  to Title I of ERISA,  referred  to as  "non-ERISA
plans,"  should  consider  that  a plan  may  only  make  investments  that  are
authorized  by the  appropriate  governing  instrument.  Fiduciary  shareholders
should  consult their own legal  advisors if they have any concern as to whether
the investment is consistent with the foregoing criteria.

     Prohibited Transactions.  Fiduciaries of ERISA plans and persons making the
investment  decision  for an IRA or other  non-ERISA  plan should  consider  the
application of the prohibited  transaction  provisions of ERISA and the Internal
Revenue Code in making their investment  decision.  Sales and other transactions
between  an ERISA  plan or a  non-ERISA  plan,  and  persons  related  to it are
prohibited  transactions.  The  particular  facts  concerning  the  sponsorship,
operations and other  investments of an ERISA plan or non-ERISA plan may cause a
wide range of other persons to be treated as disqualified  persons or parties in
interest with respect to it. A prohibited  transaction,  in addition to imposing
potential personal liability upon fiduciaries of ERISA plans, may also result in
the  imposition  of an excise tax under the  Internal  Revenue Code or a penalty
under ERISA upon the  disqualified  person or party in interest  with respect to
the plan.  If the  disqualified  person who  engages in the  transaction  is the
individual  on  behalf  of  whom  an  IRA  or  Roth  IRA  is  maintained  or his
beneficiary,  the IRA or Roth IRA may lose its tax-exempt  status and its assets
may  be  deemed  to  have  been  distributed  to  the  individual  in a  taxable
distribution on account of the prohibited transaction, but no excise tax will be
imposed.  Fiduciary shareholders should consult their own legal advisors if they
have any concern as to whether the ownership of Senior Housing shares involves a
prohibited transaction.

     Special Fiduciary and Prohibited Transactions Consequences.  The Department
of Labor,  which has administrative  responsibility  over ERISA plans as well as
non-ERISA plans, has issued a regulation  defining "plan assets." The regulation
generally provides that when an ERISA or non-ERISA plan acquires a security that
is an equity  interest  in an entity and that  security  is neither a  "publicly
offered  security"  nor a security  issued by an investment  company  registered
under the Investment  Company Act of 1940, the ERISA plan's or non-ERISA  plan's
assets include both the equity interest and an undivided interest in each of the
underlying assets of the entity, unless it is established either that the entity
is an operating  company or that equity  participation  in the entity by benefit
plan investors is not significant.

     Each class of Senior  Housing  shares--that  is, its common  shares and any
class of  preferred  shares  that it may issue in the  future--must  be analyzed
separately  to  ascertain  whether  it  is  a  publicly  offered  security.  The
regulation  defines a publicly  offered  security as a security  that is "widely
held," "freely transferable" and either part of a class of securities registered
under  the  Securities  Exchange  Act  of  1934,  or  sold  under  an  effective
registration statement under the Securities Act of 1933, provided the securities
are registered  under the Securities  Exchange Act of 1934 within 120 days after
the end of the fiscal year of the issuer  during  which the  offering  occurred.
Senior  Housing shares will be registered  under the Securities  Exchange Act of
1934.

                                       97
<PAGE>

     The regulation provides that a security is "widely held" only if it is part
of a class of securities  that is owned by 100 or more investors  independent of
the issuer and of one another.  However,  a security will not fail to be "widely
held" because the number of independent  investors falls below 100 subsequent to
the initial public  offering as a result of events beyond the issuer's  control.
Senior Housing expects its common shares to be widely held.

     The regulation provides that whether a security is "freely transferable" is
a factual  question  to be  determined  on the basis of all  relevant  facts and
circumstances. The regulation further provides that, where a security is part of
an  offering  in  which  the  minimum   investment  is  $10,000  or  less,  some
restrictions on transfer ordinarily will not, alone or in combination,  affect a
finding that these  securities  are freely  transferable.  The  restrictions  on
transfer enumerated in the regulation as not affecting that finding include:

     o    any  restriction on or prohibition  against any transfer or assignment
          which would result in a termination or reclassification for federal or
          state tax purposes,  or would  otherwise  violate any state or federal
          law or court order;

     o    any  requirement  that advance  notice of a transfer or  assignment be
          given to the issuer and any requirement  that either the transferor or
          transferee,    or   both,   execute    documentation   setting   forth
          representations  as to compliance  with any  restrictions  on transfer
          which are among those  enumerated  in the  regulation as not affecting
          free  transferability,  including  those  described  in the  preceding
          clause of this sentence;

     o    any  administrative  procedure which establishes an effective date, or
          an  event  prior  to  which  a  transfer  or  assignment  will  not be
          effective; and

     o    any limitation or  restriction on transfer or assignment  which is not
          imposed by the issuer or a person acting on behalf of the issuer.

     Senior Housing believes that the restrictions imposed under the declaration
of trust on the transfer of shares do not result in the failure of its shares to
be "freely transferable."  Furthermore,  Senior Housing believes that at present
there exist no other facts or circumstances  limiting the transferability of its
shares which are not included among those enumerated as not affecting their free
transferability  under the  regulation,  and Senior  Housing  does not expect or
intend to impose in the future, or to permit any person to impose on its behalf,
any  limitations  or  restrictions  on  transfer  which  would  not be among the
enumerated permissible limitations or restrictions.

     Assuming that each class of Senior  Housing's  shares will be "widely held"
and that no other facts and circumstances  exist which restrict  transferability
of these  shares,  Senior  Housing has  received an opinion of counsel  that its
shares will not fail to be "freely  transferable" for purposes of the regulation
due to the  restrictions  on  transfer  of the  shares  under  Senior  Housing's
declaration  of trust and that under the  regulation  the  shares  are  publicly
offered  securities and Senior  Housing's  assets will not be deemed to be "plan
assets"  of any ERISA plan or  non-ERISA  plan that  invests  in Senior  Housing
shares.

                                       98
<PAGE>

                                  LEGAL MATTERS

     Sullivan & Worcester  LLP,  Boston,  Massachusetts,  the lawyers for Senior
Housing,  have issued an opinion  about the  legality of the shares.  Sullivan &
Worcester LLP will rely, as to certain  matters of Maryland law, upon an opinion
of Ballard Spahr Andrews & Ingersoll, LLP, Baltimore, Maryland. Barry M. Portnoy
was a partner and  chairman of the firm of Sullivan & Worcester  LLP until March
31, 1997 and is one of Senior Housing's managing trustees. Mr. Portnoy is also a
managing trustee of HRPT, Hospitality Properties and a director and 50% owner of
Reit  Management,  the  investment  advisor to Senior  Housing,  a director  and
significant shareholder of one of Senior Housing's tenants. Jennifer B. Clark, a
vice  president at Reit  Management,  was a partner of Sullivan & Worcester  LLP
until July 1, 1999.  Sullivan & Worcester LLP represents  Senior Housing,  HRPT,
Hospitality Properties, Reit Management and their affiliates on various matters.
Ballard  Spahr Andrews & Ingersoll LLP is a tenant of HRPT and is counsel to the
agent of Senior Housing's bank credit facility.


                                     EXPERTS


     The  consolidated  financial  statements  and  schedules of Senior  Housing
Properties  Trust at December 31, 1998 and 1997, and for each of the three years
in the  period  ended  December  31,  1998,  appearing  in this  prospectus  and
registration  statement  have been  audited  by Ernst & Young  LLP,  independent
auditors,  as set forth in their report thereon appearing  elsewhere herein, and
are included in reliance upon such report given on the authority of such firm as
experts in accounting and auditing.



                  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS
                     ON ACCOUNTING AND FINANCIAL DISCLOSURE

     None.


                           FORWARD LOOKING STATEMENTS

     This  prospectus  contains  statements  which  constitute  forward  looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995.  Those  statements  appear in a number of  places in this  prospectus  and
include statements regarding the intent,  belief or expectations of HRPT, Senior
Housing,  their  trustees or their  officers with respect to the  declaration or
payment of dividends, the consummation of additional acquisitions,  policies and
plans  of  HRPT  and  Senior  Housing   regarding   investments,   dispositions,
financings,  conflicts of interest or other matters, HRPT's and Senior Housing's
qualification  and continued  qualification as real estate  investment trusts or
trends affecting their businesses, financial condition or results of operations.
HRPT and Senior Housing  caution you that these forward  looking  statements are
not guarantees of future performance and involve risks and uncertainties. Actual
results may differ materially from the forward looking statements as a result of
various factors. These factors include, without limitation, changes in financing
terms, HRPT's or Senior Housing's ability or inability to complete  acquisitions
and financing transactions, results of operations of HRPT's and Senior Housing's
properties   and  general   changes  in  economic   conditions   not   presently
contemplated. The "Risk Factors" and "Senior Housing Management's Discussion and
Analysis of  Financial  Condition  and Results of  Operations"  sections of this
prospectus identify other important factors that could cause these differences.

                    WHERE YOU CAN FIND ADDITIONAL INFORMATION


     Senior  Housing has filed with the SEC a registration  statement,  of which
this  prospectus is a part, on Form S-11 under the Securities Act of 1933.  This
prospectus does not contain all the  information  set forth in the  registration
statement.  Statements  contained  in this  prospectus  as to the content of any
contract or other


                                       99
<PAGE>

document  filed as an  exhibit  are not  necessarily  complete,  and you  should
consult the copy of those  contracts or other documents filed as exhibits to the
registration statement. For further information regarding Senior Housing, please
read the registration statement and the exhibits and schedules thereto.

     You may read  and copy the  registration  statement  and its  exhibits  and
schedules  at the  SEC's  Public  Reference  Room  at 450  Fifth  Street,  N.W.,
Washington,  D.C. 20549.  When the Form S-11 becomes  effective,  Senior Housing
will be subject to the reporting  requirements of the Securities Exchange Act of
1934 and the reports,  proxy  statements and other  information  filed by Senior
Housing  with the SEC can then be  inspected  and  copied  at the  SEC's  Public
Reference  Room.  You may  obtain  information  on the  operation  of the Public
Reference  Room  by  calling  the SEC at  1-800-SEC-0330.  You  may  access  the
electronic  filing of the registration  statement and its exhibits and schedules
on the SEC's internet site, http://www.sec.gov.

     Senior Housing intends to make available to its shareholders annual reports
containing  audited  financial   statements  and  quarterly  reports  containing
unaudited financial information for the first three quarters of each year.

                           ---------------------------


     You should rely only on the information  contained in this  prospectus.  We
have not, and the Senior  Housing has not,  authorized any person to provide you
with  different   information.   If  anyone   provides  you  with  different  or
inconsistent  information,  you should not rely on it.  HRPT and Senior  Housing
believe that the information  contained in this prospectus is accurate as of the
date on the cover.  Changes  may occur  after that date,  and  neither  HRPT nor
Senior Housing will update the  information  except as is required in the normal
course of their respective public disclosure  practices.  You should assume that
HRPT's and Senior Housing's business, financial condition, results of operations
and  prospects  may have changed  since the date  appearing on the cover of this
prospectus.

                           ---------------------------


     The amended and restated  declaration of trust establishing  Senior Housing
Properties  Trust,  dated , 1999, a copy of which,  together with all amendments
thereto,  is filed in the  office of the State  Department  of  Assessments  and
Taxation of Maryland,  provides that the name "Senior Housing  Properties Trust"
refers to the trustees under Senior Housing's  declaration as trustees,  but not
individually or personally, and that no trustee, officer, shareholder,  employee
or agent of  Senior  Housing  shall be held to any  personal  liability  for any
obligation of, or claim against, Senior Housing. All persons dealing with Senior
Housing  shall look only to the assets of Senior  Housing for the payment of any
sum or the performance of any obligation.

                           ---------------------------


     The amended and restated declaration of trust establishing HRPT, dated July
1, 1994, a copy of which,  together with all amendments thereto, is filed in the
office of the State Department of Assessments and Taxation of Maryland, provides
that the name  "HRPT  Properties  Trust"  refers to the  trustees  under  HRPT's
declaration  as  trustees,  but not  individually  or  personally,  and  that no
trustee,  officer,  shareholder,  employee or agent of HRPT shall be held to any
personal  liability for any obligation  of, or claim against,  HRPT. All persons
dealing  with HRPT shall look only to the assets of HRPT for the  payment of any
sum or the performance of any obligation.

                                       100

<PAGE>

<TABLE>
<CAPTION>
                                        INDEX TO FINANCIAL STATEMENTS AND SCHEDULES
<S>     <C>                                                                                                         <C>


Unaudited Pro Forma Consolidated Financial Statements of HRPT Properties Trust

         Introduction to unaudited pro forma consolidated financial statements........................................F-2

         Unaudited pro forma consolidated balance sheet as of June 30, 1999...........................................F-3

         Unaudited pro forma consolidated statement of income for the six months
             ended June 30, 1999......................................................................................F-4

         Unaudited pro forma consolidated statement of income for the year ended December 31, 1998....................F-5

         Notes to unaudited pro forma consolidated financial statements...............................................F-6

Unaudited Pro Forma Consolidated Financial Statements of Senior Housing Properties Trust

         Introduction to unaudited pro forma consolidated financial statements........................................F-8

         Unaudited pro forma consolidated balance sheet as of June 30, 1999...........................................F-9

         Unaudited pro forma consolidated statement of income for the six months
             ended June 30, 1999.....................................................................................F-10

         Unaudited pro forma consolidated statement of income for the year ended December 31, 1998...................F-11

         Notes to unaudited pro forma consolidated financial statements..............................................F-12

Consolidated Financial Statements of Senior Housing Properties Trust and Financial Statement Schedules

         Report of independent auditors..............................................................................F-14

         Consolidated balance sheets as of December 31, 1997 and 1998 and June 30, 1999 (unaudited)..................F-15

         Consolidated statements of income for each of the three years in the period ended
             December 31, 1998 and for the six months ended June 30, 1998 and 1999 (unaudited).......................F-16

         Consolidated statements of ownership interest of HRPT Properties Trust for each of the
             three years in the period ended December 31, 1998 and for the six months ended
             June 30, 1999 (unaudited)...............................................................................F-17

         Consolidated statements of cash flows for each of the three years in the period ended
             December 31, 1998 and for the six months ended June 30, 1998 and 1999 (unaudited) ......................F-18

         Notes to consolidated financial statements..................................................................F-19

         Schedule III - Real Estate and Accumulated Depreciation......................................................S-1

         Schedule IV - Mortgage Loans on Real Estate..................................................................S-4

</TABLE>

                                                            F-1
<PAGE>


                              HRPT Properties Trust

      Introduction to Unaudited Pro Forma Consolidated Financial Statements


         The following  unaudited pro forma  consolidated  balance sheet at June
30, 1999 is intended to present the financial  position of HRPT Properties Trust
as if the transactions  described in the notes had been completed as of June 30,
1999. The following  unaudited pro forma  consolidated  statements of income are
intended to present the results of operations  of HRPT as if these  transactions
had been completed as of January 1, 1998.

         These  unaudited pro forma  consolidated  financial  statements are not
necessarily  indicative of what the actual  consolidated  financial  position or
results of  operations of HRPT would have been as of the date or for the periods
indicated, nor do they represent our expected consolidated financial position or
results of  operations  for any future  period.  Differences  would result from,
among other  considerations,  future changes in HRPT's  investments,  changes in
rent which we  receive,  changes in  interest  rates and  changes in the capital
structure  of HRPT.  For more  information  about the  financial  condition  and
results of operations of HRPT, please refer to the financial  statements of HRPT
filed with the SEC, including the audited consolidated  financial statements for
the year ended December 31, 1998,  included in HRPT's Current Report on Form 8-K
dated March 5, 1999, and the unaudited consolidated financial statements for the
quarter ended June 30, 1999,  included in HRPT's  Quarterly  Report on Form 10-Q
for the quarter ended June 30, 1999.


                                      F-2
<PAGE>
<TABLE>
<CAPTION>

                                               HRPT Properties Trust
                                  Unaudited Pro Forma Consolidated Balance Sheet
                                                   June 30, 1999
                                 (dollars in thousands, except per share amounts)



                                                                                  Pro Forma
                         ASSETS                             Historical (A)        Adjustments          Pro Forma
                                                            --------------      -------------         -----------
<S>                                                         <C>                   <C>                 <C>

Real estate properties:
  Land                                                          $378,714           $(69,673)             $309,041
  Buildings and improvements                                   2,627,807           (662,720)            1,965,087
                                                              ----------          ---------            ----------
                                                               3,006,521           (732,393)            2,274,128
  Accumulated depreciation                                      (184,992)           105,823               (79,169)
                                                              ----------          ---------            ----------
                                                               2,821,529           (626,570)   (B)      2,194,959
Real estate mortgages                                             60,530            (37,638)   (B)         22,892
Investment in Hospitality Properties                             108,242                 --               108,242
Investment in Senior Housing                                          --            220,548    (C)        220,548
Cash and cash equivalents                                         26,984            (26,593)   (D)            391
Other assets, net                                                 84,869             (9,918)   (B)         74,951
                                                              ----------          ---------            ----------
                                                              $3,102,154          $(480,171)           $2,621,983
                                                              ==========          =========            ==========

          LIABILITIES AND SHAREHOLDERS' EQUITY
Bank credit facility                                                 $--                $--                   $--
Senior notes payable, net                                        957,513           (200,000)   (E)        757,513
Mortgage notes payable                                            23,985                 --                23,985
Convertible subordinated debentures                              204,863                 --               204,863
Other liabilities                                                 51,252               (756)   (B)         50,496
Deferred rents and other deferred revenues                        32,509            (27,369)   (B)          5,140
Security deposits                                                 19,332            (15,235)   (B)          4,097

Shareholders' equity:
Preferred shares of beneficial interest; $0.01 par
   value; 50,000,000 shares authorized; none
   issued                                                             --                 --                    --
Common shares of beneficial interest; $0.01 par
   value; 150,000,000 shares authorized;
   131,894,626 shares issued and outstanding                       1,319                 --                 1,319
Additional paid-in capital                                     1,971,168                 --             1,971,168
Cumulative net income                                            643,924            (10,000)   (G)        633,924
Cumulative distributions                                        (803,711)          (226,811)   (F)     (1,030,522)
                                                              ----------          ---------            ----------
  Total shareholders' equity                                   1,812,700           (236,811)            1,575,889
                                                              ----------          ---------            ----------
                                                              $3,102,154          $(480,171)           $2,621,983
                                                              ==========          =========            ==========

</TABLE>


See accompanying notes.

                                                       F-3
<PAGE>
<TABLE>
<CAPTION>

                                            HRPT Properties Trust
                            Unaudited Pro Forma Consolidated Statement of Income
                                   For the Six Months Ended June 30, 1999
                                (amounts in thousands, except per share data)



                                                                          Pro Forma
Revenues:                                       Historical (A)           Adjustments             Pro Forma
                                                --------------          ------------            ----------
<S>                                               <C>                   <C>                     <C>

   Rental income                                   $ 203,335             $ (42,409)              $ 160,926
   Interest and other income                           7,619                (2,881)                  4,738
                                                   ---------             ---------               ---------
           Total revenues                            210,954               (45,290)  (H)           165,664
                                                   ---------             ---------               ---------
Expenses:
   Operating expenses                                 50,548                    --                  50,548
   Interest                                           39,525                (5,600)  (I)            33,925
   Depreciation and amortization                      37,314               (11,207)  (J)            26,107
   General and administrative                          9,849                (2,259)  (K)             7,590
                                                   ---------             ---------               ---------
            Total expenses                           137,236               (19,066)                118,170
                                                   ---------             ---------               ---------
Income before equity in earnings of
   Hospitality Properties and Senior
   Housing, and gain on sale of properties            73,718               (26,224)                 47,494
Equity in earnings of Hospitality Properties           4,029                    --                   4,029
Equity in earnings of Senior Housing                      --                12,100   (L)            12,100
Loss on equity transaction of Hospitality
   Properties                                           (711)                   --                    (711)
                                                   ---------             ---------               ---------
Income before gain on sale of properties              77,036               (14,124)                 62,912
Gain on sale of properties                             8,307                  --                     8,307
                                                   ---------             ---------               ---------
Net income                                         $  85,343             $ (14,124)              $  71,219
                                                   =========             =========               =========

Weighted average shares outstanding                  131,778                    --                 131,778
                                                   =========             =========               =========

Basic and diluted earnings per share:
   Income before gain on sale of properties        $    0.58                                     $    0.48
                                                   =========                                     =========
   Net income                                      $    0.65                                     $    0.54
                                                   =========                                     =========


</TABLE>

See accompanying notes.


                                                    F-4
<PAGE>
<TABLE>
<CAPTION>
                                            HRPT Properties Trust
                             Unaudited Pro Forma Consolidated Statement of Income
                                     For the Year Ended December 31, 1998
                                 (amounts in thousands, except per share data)





                                                                            Pro Forma
Revenues:                                             Historical (A)       Adjustments             Pro Forma
                                                      --------------      ------------             ----------
<S>                                                    <C>                 <C>                     <C>
   Rental income                                        $ 340,851           $ (82,542)              $ 258,309
   Interest and other income                               15,703              (5,764)                  9,939
                                                        ---------           ---------               ---------
           Total revenues                                 356,554             (88,306)  (H)           268,248
                                                        ---------           ---------               ---------
Expenses:
   Operating expenses                                      77,536                  --                  77,536
   Interest                                                64,326             (12,400)  (I)            51,926
   Depreciation and amortization                           60,764             (18,297)  (J)            42,467
   General and administrative                              17,172              (4,480)  (K)            12,692
                                                        ---------           ---------               ---------
           Total expenses                                 219,798             (35,177)                184,621
                                                        ---------           ---------               ---------


Income before equity in earnings of Hospitality
   Properties and Senior Housing, and
   extraordinary item                                     136,756             (53,129)                 83,627
Equity in earnings of Hospitality Properties                7,687                  --                   7,687
Equity in earnings of Senior Housing                           --              25,730   (L)            25,730
Gain on equity transaction of Hospitality
   Properties                                               2,213                  --                   2,213
                                                        ---------           ---------               ---------
Income before extraordinary item                          146,656             (27,399)                119,257
Extraordinary item - early extinguishment of debt          (2,140)                 --                  (2,140)
                                                        ---------           ---------               ---------
Net income                                              $ 144,516           $ (27,399)              $ 117,117
                                                        =========           =========               =========
Weighted average shares outstanding                       119,867                  --                 119,867
                                                        =========           =========               =========

Basic and diluted earnings per share:
   Income before extraordinary item                     $    1.22                                   $    0.99
                                                        =========                                   =========
   Net income                                           $    1.21                                   $    0.98
                                                        =========                                   =========


</TABLE>

See accompanying notes.



                                                      F-5

<PAGE>
                             HRPT Properties Trust
         Notes to Unaudited Pro Forma Consolidated Financial Statements
                             (dollars in thousands)


A.   Represents  the  historical  consolidated  balance  sheet and  consolidated
     statements of income of HRPT  Properties  Trust ("HRPT") as of the date and
     for the periods presented.

                     Consolidated Balance Sheet Adjustments

B.   Represents  elimination  of HRPT's  historical  carrying value of 93 senior
     housing investments and related assets and liabilities  transferred by HRPT
     to Senior Housing Properties Trust ("Senior Housing").

<TABLE>
<CAPTION>
C.   Represents adjustments to reflect HRPT's investment in Senior Housing after
     the  spin-off  and  related   transactions   using  the  equity  method  of
     accounting, calculated as follows:
    <S>                                                                                           <C>

     Net historical carrying value of 93 senior housing investments and related assets and
         liabilities transferred to Senior Housing (see note B)                                    $ 630,934
     Estimated cash transferred by HRPT to Senior Housing (see note D)                                16,425
     Cash payment by Senior Housing of the formation debt to HRPT (see note E)                      (200,000)
     Distribution by HRPT of Senior Housing shares to HRPT shareholders (see note F)                (226,811)
                                                                                                   ---------
     HRPT's equity investment in Senior Housing                                                    $ 220,548
                                                                                                   =========
<CAPTION>
D.   Represents  the net cash effect of the spin-off  and related  transactions,
     calculated as follows:
    <S>                                                                                          <C>
     Senior Housing cash at June 30, 1999                                                          $    (168)
     Estimated cash transferred to Senior Housing from HRPT                                          (16,425)
     Estimated transaction costs paid by HRPT (not reimbursed by Senior Housing)                     (10,000)
     Cash received by HRPT from Senior Housing to pay the formation debt (see note E)                200,000
     Cash used by HRPT to prepay HRPT senior debt outstanding (see note E)                          (200,000)
                                                                                                   ---------
                                                                                                   $ (26,593)
                                                                                                   =========

</TABLE>
E.   After completion of the spin-off, Senior Housing will borrow $200,000 under
     its bank credit facility to pay the Senior Housing  formation debt due HRPT
     of $200,000.  This adjustment reflects the application of these proceeds by
     HRPT to prepay HRPT senior debt outstanding.


<TABLE>
<CAPTION>
F.   Represents the  distribution of Senior Housing shares to HRPT  shareholders
     on  the  basis  of one  Senior  Housing  share  for  each  10  HRPT  shares
     outstanding, calculated as follows:
    <S>                                                                                           <C>

     Net historical carrying value of 93 senior housing investments and related assets and
         liabilities transferred to Senior Housing (see note B)                                    $ 630,934
     Estimated cash transferred to Senior Housing                                                     16,425
     Cash received by HRPT from Senior Housing to pay the formation debt (see note E)               (200,000)
                                                                                                   ---------
                                                                                                     447,359
     Multiplied by:
         Senior Housing shares distributed to HRPT shareholders (13.19 million) as a percentage
          of total Senior Housing shares outstanding (26 million)                                  x   50.7%
                                                                                                   ---------
                                                                                                   $ 226,811
                                                                                                   =========

</TABLE>
                                                F-6
<PAGE>


                             HRPT Properties Trust
   Notes to Unaudited Pro Forma Consolidated Financial Statements - continued
                             (dollars in thousands)


G.   Represents  estimated  transaction  costs of $10  million to be expensed by
     HRPT.  These  expenses  are not  reflected in the pro forma  statements  of
     income because they are not recurring.

                  Consolidated Statements of Income Adjustments

H.   Represents historical rent, interest and other income realized by HRPT from
     properties transferred to Senior Housing.

I.   Represents the reduction in HRPT's interest expense, calculated as follows:

<TABLE>
<CAPTION>

                                                              Six Months              Year Ended
                                                             Ended June 30,          December 31,
                                                                 1999                    1998
                                                             -------------          -------------
    <S>                                                      <C>                   <C>
     HRPT's senior notes prepaid (see note E)                    $200,000               $200,000
     Multiplied by:
       Historical interest rate of debt to be prepaid         x      5.6%           x       6.2%
                                                              -----------           ------------
     Reduction in HRPT's interest expense                          $5,600                $12,400
                                                              ===========           ============


</TABLE>

J.   Represents the historical  depreciation  expense  related to the properties
     transferred to Senior Housing.

K.   Represents  the  amount  of  HRPT's  general  and  administrative   expense
     allocated to the properties  transferred to Senior Housing. This allocation
     is based upon HRPT's  advisory  fee formula and other costs  allocated  pro
     rata to the historical  cost of the  transferred  assets compared to HRPT's
     historical cost of all its properties. Management believes that this method
     of allocating general and administrative expenses is reasonable.

L.   Represents HRPT's share of the pro forma  consolidated net income of Senior
     Housing (presented on pages F-10 and F-11), calculated as follows:

<TABLE>
<CAPTION>

                                                                      Six Months           Year Ended
                                                                     Ended June 30,       December 31,
                                                                         1999                 1998
                                                                     -------------       -------------
    <S>                                                             <C>                  <C>
     Senior Housing pro forma net income                                $24,543               $52,191
     Multiplied by:
       HRPT's ownership of Senior Housing shares (12.81 million)
       as a percentage of total Senior Housing shares outstanding
       (26 million)
                                                                     x    49.3%           x     49.3%
                                                                     -----------          -----------
     Equity in earnings of Senior Housing                               $12,100               $25,730
                                                                     ===========          ===========

</TABLE>



                                       F-7
<PAGE>


                         Senior Housing Properties Trust

      Introduction to Unaudited Pro Forma Consolidated Financial Statements


         The following  unaudited pro forma  consolidated  balance sheet at June
30,  1999,  is  intended  to present the  financial  position of Senior  Housing
Properties  Trust  as if the  transactions  described  in  the  notes  had  been
completed as of June 30, 1999.  The following  unaudited pro forma  consolidated
statements of income are intended to present the results of operations of Senior
Housing as if these transactions had been completed as of January 1, 1998.

         These  unaudited pro forma  consolidated  financial  statements are not
necessarily  indicative  of the  expected  consolidated  financial  position  or
results of operations of Senior Housing for any future period. Differences could
result  from  many  factors,   including  future  changes  in  Senior  Housing's
investments,  changes in interest rates and changes in the capital  structure of
Senior Housing.  This pro forma  information  should be read in conjunction with
the audited Consolidated Financial Statements of Senior Housing Properties Trust
and notes thereto  appearing on pages F-15 through F-21 and with "Senior Housing
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations" appearing elsewhere in this prospectus.




                                       F-8

<PAGE>
<TABLE>
<CAPTION>


                                       Senior Housing Properties Trust
                                Unaudited Pro Forma Consolidated Balance Sheet
                                                 June 30, 1999
                               (dollars in thousands, except per share amounts)


                                                                             Pro Forma
              ASSETS                              Historical (A)            Adjustments            Pro Forma
                                                  --------------            -----------           ----------
<S>                                                 <C>                       <C>                <C>

Real estate properties:
   Land                                              $  69,673                    $--              $  69,673
   Buildings and improvements                          662,720                     --                662,720
                                                     ---------              ---------              ---------
                                                       732,393                     --                732,393
   Accumulated depreciation                           (105,823)                    --               (105,823)
                                                     ---------              ---------              ---------
                                                       626,570                     --                626,570
Real estate mortgages                                   37,638                     --                 37,638
Cash and cash equivalents                                  168                 16,425    (B)          16,593
Other assets                                             9,918                     --                  9,918
                                                     ---------              ---------              ---------
                                                     $ 674,294              $  16,425              $ 690,719
                                                     =========              =========              =========

          LIABILITIES AND SHAREHOLDERS' EQUITY
Bank credit facility                                       $--              $ 200,000    (C)       $ 200,000
Deferred rents and other deferred revenues              27,369                     --                 27,369
Security deposits                                       15,235                     --                 15,235
Other liabilities                                          756                     --                    756

Shareholders' equity:
Common shares of beneficial interest; $0.01 par
   value; 50,000,000 shares authorized; 26,000,000
   pro forma shares issued and outstanding                  --                    260    (D)             260
Additional paid-in capital                                  --                447,099    (E)         447,099
Ownership interest of HRPT Properties Trust            630,934               (630,934)   (F)              --
                                                     ---------              ---------              ---------
   Total shareholders' equity                          630,934               (183,575)               447,359
                                                     ---------              ---------              ---------
                                                     $ 674,294              $  16,425              $ 690,719
                                                     =========              =========              =========


</TABLE>

See accompanying notes.


                                                      F-9
<PAGE>
<TABLE>
<CAPTION>

                            Senior Housing Properties Trust
                  Unaudited Pro Forma Consolidated Statement of Income
                         For the Six Months Ended June 30, 1999
                     (amounts in thousands, except per share data)



                                                            Pro Forma
Revenues:                               Historical (A)     Adjustments       Pro Forma
                                        --------------     -----------       ---------
<S>                                      <C>               <C>               <C>

   Rental income                           $42,409              $--           $42,409
   Interest and other income                 2,881               --             2,881
                                           -------           ------           -------
           Total revenues                   45,290               --            45,290
                                           -------           ------           -------

Expenses:
   Interest                                  9,992           (2,711)   (G)      7,281
   Depreciation                             11,207               --            11,207
   General and administrative                2,259               --             2,259
                                           -------           ------           -------
           Total expenses                   23,458           (2,711)           20,747
                                           -------           ------           -------

Net income                                 $21,832           $2,711           $24,543
                                           =======           ======           =======

Weighted average shares outstanding                          26,000    (H)     26,000
                                                             ======           =======
Earnings per share                                                              $0.94
                                                                              =======

</TABLE>


See accompanying notes.


                                          F-10
<PAGE>
<TABLE>
<CAPTION>
                            Senior Housing Properties Trust
                  Unaudited Pro Forma Consolidated Statement of Income
                          For the Year Ended December 31, 1998
                     (amounts in thousands, except per share data)

                                                            Pro Forma
Revenues:                               Historical (A)     Adjustments       Pro Forma
                                        --------------     -----------       ---------
<S>                                      <C>               <C>               <C>
   Rental income                          $82,542           $ 1,461           $84,003
   Interest and other income                5,764                --             5,764
                                          -------           -------           -------
           Total revenues                  88,306             1,461    (I)     89,767
                                          -------           -------           -------


Expenses:
   Interest                                19,293            (4,730)   (G)     14,563
   Depreciation                            18,297               193    (I)     18,490
   General and administrative               4,480                43    (I)      4,523
                                          -------           -------           -------
           Total expenses                  42,070            (4,494)           37,576
                                          -------           -------           -------

Net income                                $46,236           $ 5,955           $52,191
                                          =======           =======           =======

Weighted average shares outstanding                          26,000    (H)     26,000
                                                             ======           =======
Earnings per share                                                              $2.01
                                                                              =======

</TABLE>



See accompanying notes.


                                          F-11
<PAGE>
                              Senior Housing Properties Trust
               Notes to Unaudited Pro Forma Consolidated Financial Statements
                       (dollars in thousands, except per share data)



A.   Represents  the  historical  consolidated  balance  sheet and  consolidated
     statements of income of Senior Housing  Properties Trust ("Senior Housing")
     as presented on pages F-15 and F-16.

                     Consolidated Balance Sheet Adjustments

<TABLE>
<CAPTION>
B.   Represents the net cash effect of the spin-off and related  transactions on
     Senior Housing, calculated as follows:
    <S>                                                                               <C>
     Estimated cash transferred by HRPT to Senior Housing                              $  16,425
     Borrowing under Senior Housing's bank credit facility (see note C)                  200,000
     Payment by Senior Housing of the formation debt due to HRPT                        (200,000)
                                                                                       ---------
                                                                                       $  16,425
                                                                                       =========

</TABLE>
C.   Represents  the borrowing of $200,000  under Senior  Housing's  bank credit
     facility.  The  proceeds  from this  borrowing  will be used to pay  Senior
     Housing's formation debt due to HRPT.


D.   Represents  the $0.01 per share par value of the 26 million  Senior Housing
     shares issued and outstanding as of the spin-off date.

<TABLE>
<CAPTION>

E.   Represents the  adjustments  from the spin-off and related  transactions to
     Senior Housing's equity, calculated as follows:
    <S>                                                                               <C>
     Ownership interest of HRPT Properties Trust                                       $ 630,934
     Payment by Senior Housing of the formation debt due to HRPT (see note C)           (200,000)
     Estimated cash transferred to Senior Housing from HRPT (see note B)                  16,425
                                                                                       ---------
     Senior Housing equity (includes $220,548 of HRPT's equity investment and            447,359
         $226,811 distributed in the spin-off)
     Par value of Senior Housing shares outstanding (see note D)                            (260)
                                                                                       ---------
     Additional paid-in capital                                                        $ 447,099
                                                                                       =========
<CAPTION>
F.   Represents  reclassification  of  balance  of  Ownership  Interest  of HRPT
     related to the spin-off, calculated as follows:
    <S>                                                                               <C>
     Formation debt due HRPT paid by Senior Housing (see note C)                       $(200,000)
     Estimated cash transferred to Senior Housing from HRPT                               16,425
     Par value of Senior Housing's 26 million shares outstanding (see note D)               (260)
     Senior Housing's additional paid-in capital (see note E)                           (447,099)
                                                                                       ---------
                                                                                       $(630,934)
                                                                                        =========

</TABLE>



                                           F-12
<PAGE>


                        Senior Housing Properties Trust
   Notes to Unaudited Pro Forma Consolidated Financial Statements - continued
                  (dollars in thousands, except per share data)


                  Consolidated Statements of Income Adjustments

G.   Represents  adjustments  to interest  expense from the spin-off and related
     transactions, calculated as follows:

<TABLE>
<CAPTION>

                                                                                    Year Ended
                                                             Six Months Ended       December 31,
                                                               June 30, 1999           1998
                                                             ----------------      -------------
    <S>                                                         <C>                <C>
     HRPT interest expense allocated to the Senior Housing
         properties                                              $ (9,992)           $(19,293)
     Interest expense on Senior Housing's $200,000 borrowing
         under its bank credit facility  (see note C)               7,281              14,563
                                                                 --------            --------
                                                                 $ (2,711)           $ (4,730)
                                                                 ========            ========

</TABLE>

     The HRPT interest  expense  allocation to Senior  Housing is the historical
     amount of HRPT's total interest expense times a fraction,  the numerator of
     which is the historical  cost of HRPT's senior  housing  properties and the
     denominator of which is the historical cost of all HRPT's properties,  each
     calculated  on an  average  basis  for the  periods  presented.  Management
     believes this method of allocating interest expense is reasonable.


     The  interest  rate payable by Senior  Housing is LIBOR plus a premium,  or
     7.0% as of June 30,  1999.  Interest  expense  also  includes  a fee on the
     unused portion of the bank credit  facility of 0.375%,  or $281 for the six
     months  ended June 30, 1999, and $563 for the year ended December 31, 1998.
     The effect of a 1/8% change in interest rates, on pro forma borrowings will
     change interest expense by $250.


H.   As of the date of the spin-off,  Senior Housing will have 26 million shares
     issued and outstanding.

I.   Represents  rental  income,  depreciation  and general  and  administrative
     expenses  arising  from  the  acquisition  of  five of the  Senior  Housing
     properties  in September  1998, as if the  properties  had been acquired on
     January 1, 1998.



                                      F-13
<PAGE>

                         REPORT OF INDEPENDENT AUDITORS


The Board of Trustees and Shareholder of Senior Housing Properties Trust:


We have audited the accompanying  consolidated  balance sheets of Senior Housing
Properties Trust as of December 31, 1998 and 1997, and the related  consolidated
statements of income, ownership interest of HRPT Properties Trust and cash flows
for each of the three years in the period ended  December  31, 1998.  Our audits
also  included the  financial  statement  schedules  listed in the Index at F-1.
These financial statements and schedules are the responsibility of the Company's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements and schedules based on our audits.


We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.


In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the consolidated  financial  position of Senior Housing
Properties Trust at December 31, 1998 and 1997, and the consolidated  results of
their  operations and their cash flows for each of the three years in the period
ended  December 31, 1998,  in  conformity  with  generally  accepted  accounting
principles.  Also, in our opinion,  the related financial  statement  schedules,
when considered in relation to the basic financial  statements taken as a whole,
present fairly in all material respects the information set forth therein.



                                                      /s/ ERNST & YOUNG LLP


Boston, Massachusetts
July 1, 1999, except for Note 1,
as to which the date is September 1, 1999



                                      F-14
<PAGE>

<TABLE>
<CAPTION>


                           Senior Housing Properties Trust
                              Consolidated Balance Sheets
                                (dollars in thousands)



                                                As of December 31,
                                              ----------------------   As of June 30,
                                                 1997         1998          1999
                                              ---------    ---------   --------------
                                                                         (unaudited)
                           ASSETS
<S>                                          <C>          <C>          <C>
Real estate properties:
    Land                                      $  68,265    $  69,673    $  69,673
    Buildings and improvements                  652,722      662,720      662,720
                                              ---------    ---------    ---------
                                                720,987      732,393      732,393
    Accumulated depreciation                    (74,213)     (94,616)    (105,823)
                                              ---------    ---------    ---------
                                                646,774      637,777      626,570
Real estate mortgages                            38,134       37,826       37,638
Cash and cash equivalents                            --          139          168
Other assets                                      7,678       10,554        9,918
                                              ---------    ---------    ---------
                                              $ 692,586    $ 686,296    $ 674,294
                                              =========    =========    =========


          LIABILITIES AND OWNERSHIP INTEREST
Deferred rents and other deferred revenues    $  29,721    $  28,266    $  27,369
Security deposits                                15,235       15,235       15,235
Other liabilities                                   692          726          756
Ownership interest of HRPT Properties Trust     646,938      642,069      630,934
                                              ---------    ---------    ---------
                                              $ 692,586    $ 686,296    $ 674,294
                                              =========    =========    =========

</TABLE>

See accompanying notes.

                                         F-15
<PAGE>

<TABLE>
<CAPTION>


                             Senior Housing Properties Trust
                            Consolidated Statements of Income
                                  (dollars in thousands)


                                                                   Six Months Ended
                                  Year Ended December 31,               June 30,
                                ---------------------------    -------------------------
                                 1996      1997      1998          1998          1999
                                -------   -------   -------      -------       -------
                                                               (unaudited)   (unaudited)
<S>                            <C>       <C>       <C>          <C>           <C>
Revenues:
   Rental income                $66,202   $78,463   $82,542      $40,324       $42,409
   Interest and other income      4,240     5,708     5,764        2,886         2,881
                                -------   -------   -------      -------       -------
      Total revenues             70,442    84,171    88,306       43,210        45,290
                                -------   -------   -------      -------       -------

Expenses:
   Interest                      14,719    16,958    19,293        9,263         9,992
   Depreciation                  15,383    17,826    18,297        9,102        11,207
   General and administrative     3,899     4,664     4,480        2,174         2,259
                                -------   -------   -------      -------       -------
      Total expenses             34,001    39,448    42,070       20,539        23,458
                                -------   -------   -------      -------       -------

Net income                      $36,441   $44,723   $46,236      $22,671       $21,832
                                =======   =======   =======      =======       =======


</TABLE>

See accompanying notes.

                                          F-16
<PAGE>



                        Senior Housing Properties Trust
                Consolidated Statements of Ownership Interest of
                              HRPT Properties Trust
                             (dollars in thousands)



          Balance at December 31, 1995              $ 573,793

              Net income                               36,441
              Owner contribution, net                  54,258
                                                    ---------
          Balance at December 31, 1996                664,492

              Net income                               44,723
              Owner distribution, net                 (62,277)
                                                    ---------
          Balance at December 31, 1997                646,938

              Net income                               46,236
              Owner distribution, net                 (51,105)
                                                    ---------
          Balance at December 31, 1998                642,069


              Net income (unaudited)                   21,832
              Owner distribution, net (unaudited)     (32,967)
                                                    ---------
          Balance at June 30, 1999 (unaudited)      $ 630,934
                                                    =========


See accompanying notes.

                                      F-17
<PAGE>
<TABLE>
<CAPTION>


                                             Senior Housing Properties Trust
                                          Consolidated Statements of Cash Flows
                                                  (dollars in thousands)


                                                              Year Ended December 31,          Six Months Ended June 30,
                                                        -----------------------------------    -------------------------
                                                           1996         1997         1998         1998           1999
                                                        ---------    ---------    ---------    ---------       ---------
                                                                                              (unaudited)     (unaudited)
<S>                                                    <C>          <C>          <C>          <C>            <C>
Cash Flows From Operating Activities:
   Net income                                           $  36,441    $  44,723    $  46,236    $  22,671      $  21,832
   Adjustments to reconcile net income to cash
     provided by operating activities:
       Depreciation                                        15,383       17,826       18,297        9,102         11,207
       Changes in assets and liabilities:
       Other assets                                        (1,317)      (2,394)      (2,876)         667            636
       Deferred rents and other deferred revenues             723       22,087       (1,455)        (496)          (897)
       Security deposits                                       34        8,815           --           --             --
       Other liabilities                                       44           37           34           31             30
                                                        ---------    ---------    ---------    ---------      ---------
     Cash provided by operating activities                 51,308       91,094       60,236       31,975         32,808
                                                        ---------    ---------    ---------    ---------      ---------
Cash Flows From Investing Activities:
   Real estate acquisitions and improvements             (105,094)     (19,799)          (2)          --             --
   Investments in mortgage loans                             (700)        (124)          --           --             --
   Repayments of mortgage loans                               228          260          308          135            188
                                                        ---------    ---------    ---------    ---------      ---------
     Cash (used for) provided by investing activities
                                                         (105,566)     (19,663)         306          135            188
                                                        ---------    ---------    ---------    ---------      ---------
Cash Flows From Financing Activities:
   Owner's net contribution (distribution)                 54,258      (71,431)     (60,403)     (32,110)       (32,967)
                                                        ---------    ---------    ---------    ---------      ---------
     Cash provided by (used for) financing
       activities                                          54,258      (71,431)     (60,403)     (32,110)       (32,967)
                                                        ---------    ---------    ---------    ---------      ---------
Increase in cash and cash equivalents                          --           --          139           --             29
Cash and cash equivalents at beginning of period               --           --           --           --            139
                                                        ---------    ---------    ---------    ---------      ---------
Cash and cash equivalents at end of period                    $--          $--    $     139          $--      $     168
                                                        =========    =========    =========    =========      =========

Non-Cash Investing Activities:
   Real estate acquisitions                                   $--    $  (9,154)   $  (9,298)         $--            $--
Non-Cash Financing Activities:
   Owner's contributions                                       --        9,154        9,298           --             --


</TABLE>

See accompanying notes.

                                                          F-18
<PAGE>

                         SENIOR HOUSING PROPERTIES TRUST
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1. Organization


The consolidated financial statements of Senior Housing Properties Trust include
the accounts of 81 properties and 12 mortgage receivables (the "Properties") and
of Senior Housing Properties Trust ("Senior Housing Trust").  The Properties and
Senior Housing Trust are  collectively  referred to as "Senior  Housing".  These
consolidated financial statements are presented as if Senior Housing was a legal
entity separate from HRPT Properties  Trust  ("HRPT");  however,  no such entity
exists.


HRPT organized Senior Housing Trust, a 100% owned subsidiary, as a Maryland real
estate  investment trust on December 16, 1998. At the time of its  organization,
Senior  Housing Trust issued 26.4 million  shares to HRPT for  consideration  of
$263,748.  Subsequently, 0.4 million shares were cancelled and 26 million shares
are currently issued and outstanding.


As of the dates and for the  periods  presented,  the  Properties  were owned by
HRPT. On or about June 30, 1999,  the  Properties  were  transferred  by HRPT to
several of its 100% owned subsidiaries.  Effective as of September 1, 1999, HRPT
transferred 100% ownership of the several  subsidiaries which own the Properties
to Senior Housing Trust.  HRPT is in the process of distributing 13.2 million of
its  26  million  Senior  Housing  Trust  shares  to  HRPT's  shareholders  (the
"Spin-Off").  Senior  Housing Trust has filed a  registration  statement on Form
S-11 with the Securities and Exchange Commission to effect the Spin-Off.


Note 2. Summary of Significant Accounting Policies

Basis of  Presentation.  All of  Senior  Housing  is owned by HRPT,  and  HRPT's
historical basis has been presented.  Substantially all of the rental income and
mortgage  interest  income  received by HRPT from the tenants and  mortgagors of
Senior Housing is deposited in and commingled with HRPT's general funds. Capital
investments  and other cash  required by Senior  Housing  are  provided by HRPT.
Interest expense is allocated based on HRPT's  historical  interest expense as a
percentage  of  HRPT's  average  historical  costs of real  estate  investments.
General and  administrative  costs of HRPT are allocated to Senior Housing based
on HRPT's  investment  advisory  agreement formula and other costs are allocated
based on historical costs as a percentage of HRPT's average  historical costs of
real  estate  investments.  In  the  opinion  of  management,  the  methods  for
allocating interest and general and administrative  expenses are reasonable.  It
is not practicable to estimate additional costs that would have been incurred by
Senior Housing as a separate entity.

Real Estate  Properties and Mortgage  Investments.  Depreciation  on real estate
properties is expensed on a straight-line  basis over estimated  useful lives of
up to 40 years for  buildings and  improvements  and up to 12 years for personal
property.  Impairment  losses on properties are recognized  where  indicators of
impairment are present and the undiscounted cash flows estimated to be generated
by the properties are less than the carrying amount of concerned properties. The
determination  of net realizable  value includes  consideration  of many factors
including  income to be earned from the property,  holding  costs  (exclusive of
interest),   estimated  selling  prices,  and  prevailing  economic  and  market
conditions.  Based upon these factors,  the  accompanying  financial  statements
include no impairment losses.


Revenue  Recognition.  Rental  income from  operating  leases is recognized on a
straight-line  basis over the life of the lease  agreements.  Interest income is
recognized  as earned  over the terms of the real estate  mortgages.  Percentage
rent and  supplemental  mortgage  interest  income is recognized as earned.  For
interim periods,  percentage rent and supplemental  mortgage interest income are
accrued prior to  achievement of specified  targets when the  achievement of the
targets is  probable.  For the years ended  December  31,  1996,  1997 and 1998,
percentage  rent and  supplemental  mortgage  interest  income  aggregated  $2.6
million, $2.9 million and $2.9 million,  respectively.  For the six months ended
June 30,  1998 and 1999,  percentage  rent and  supplemental  mortgage  interest
income  aggregated  $1.4  million  (unaudited)  and  $2.0  million  (unaudited),
respectively.


                                      F-19
<PAGE>

                         SENIOR HOUSING PROPERTIES TRUST
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


Use of Estimates.  Preparation of these financial  statements in conformity with
generally accepted  accounting  principles requires management to make estimates
and  assumptions  that may  affect  the  amounts  reported  in  these  financial
statements  and  related  notes.  The actual  results  could  differ  from these
estimates.

Income  Taxes.   Throughout  the  periods  presented  herein,  Senior  Housing's
operations  were  included in HRPT's  income tax returns.  HRPT is a real estate
investment   trust  under  the  Internal  Revenue  Code  of  1986,  as  amended.
Accordingly,  it is not subject to Federal  income taxes provided it distributes
its taxable income and meets other  requirements for qualifying as a real estate
investment trust.  However, it is subject to state and local taxes on its income
and property. Upon completion of the Spin-Off, Senior Housing intends to qualify
as a real estate  investment  trust under the Internal  Revenue Code of 1986, as
amended.

Note 3.  Real Estate Properties

The owned Properties are leased on triple net bases, pursuant to noncancellable,
fixed term operating leases expiring between 2001 to 2019. Generally, the leases
to a single  tenant  or group of  affiliated  tenants  are  cross-defaulted  and
cross-guaranteed, and provide for all or none tenant renewal options at existing
rates  followed by several  market rate renewal  terms.  These triple net leases
generally require the lessee to pay all property operating costs.

The future minimum lease payments to be received during the current terms of the
leases, as of December 31, 1998, are approximately  $79.4 million in 1999, $80.1
million in 2000,  $80.1 million in 2001, $81.7 million in 2002, $81.9 million in
2003 and $686.6 million thereafter.

Note 4.  Real Estate Mortgages

                                                            December 31,
                                                    -------------------------
                                                      1997             1998
                                                    -------------------------
                                                      (dollars in thousands)
       Mortgage notes receivable due December 2016   $ 8,800          $ 8,769
       Mortgage note receivable due January 2013         883              883
       Mortgage note receivable due December 2010     19,184           18,992
       Mortgage notes receivable due January 2006      9,267            9,182
                                                    -------------------------
                                                     $38,134          $37,826
                                                    =========================

At December 31, 1998, the interest rates on these notes  receivable  ranged from
10.1% to 13.75% per annum.

Note 5.  Commitments and Contingencies


At December 31, 1998 and June 30, 1999, HRPT had total  commitments  aggregating
$3.7 million to fund or finance improvements to the Properties.  Upon completion
of the Spin-Off, Senior Housing Trust will assume these commitments.


Note 6.  Transactions with Affiliates

HRPT has  entered  an  investment  advisory  agreement  with Reit  Management  &
Research,  Inc.  ("Reit  Management").   Reit  Management  provides  investment,
management  and  administrative  services  to  HRPT,  and will  provide  similar
services to Senior Housing Trust.  Reit  Management is owned by Gerard M. Martin
and Barry M. Portnoy, who also serve as managing trustees of HRPT and will serve
as managing  trustees of Senior Housing Trust.  Reit  Management is paid by HRPT
based on a formula amount of gross invested assets of HRPT.  Investment advisory
fees paid by HRPT to Reit Management  during 1996, 1997 and 1998 with respect to
Senior  Housing's  invested  assets  were $3.2  million,  $3.7  million and $3.8
million, respectively. Reit Management is also entitled to an incentive fee paid
in restricted  shares based on a formula.  Concurrent with

                                      F-20
<PAGE>

                         SENIOR HOUSING PROPERTIES TRUST
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


the Spin-Off,  Senior  Housing Trust will enter a separate  agreement  with Reit
Management on substantially similar terms.

Note 7.  Fair Value of Financial Instruments and Commitments

The  financial   statements  presented  include  mortgage   investments,   rents
receivable, other liabilities and security deposits. Except as follows, the fair
values of the financial  instruments and commitments to fund  improvements  were
not materially  different  from their  carrying  values at December 31, 1997 and
1998:
<TABLE>
<CAPTION>
                                                    December 31, 1997               December 31, 1998
                                               ---------------------------    ---------------------------
                                                 Carrying                       Carrying
                                                  Amount      Fair Value         Amount       Fair Value
                                               ---------------------------    ---------------------------
                                                 (dollars in thousands)          (dollars in thousands)
<S>                                             <C>           <C>               <C>            <C>
Real estate mortgages                            $38,134       $40,466           $37,826        $40,525
Commitments to fund improvements                      --         6,207                --          3,707
</TABLE>

The fair  values  of the real  estate  mortgages  are based on  estimates  using
discounted cash flow analyses and currently  prevailing  market rates.  The fair
value of the commitments represent the actual amounts committed.

Note 8.  Concentration of Credit Risk

The assets included in these financial statements are primarily income producing
senior housing real estate located  throughout the United States.  The following
is a summary of the  significant  lessees and mortgagees as of and for the years
ended December 31, 1997 and 1998:
<TABLE>
<CAPTION>
                                                                                            Year Ended
                                                       December 31, 1997                  December 31, 1997
                                                --------------------------------    ------------------------------
                                                  Investment      % of Total          Revenue       % of Total
                                                --------------------------------    ------------------------------
                                                    (dollars in thousands)             (dollars in thousands)

<S>                                              <C>                   <C>            <C>                <C>
Marriott International, Inc.                      $325,521              43%            $30,365            36%
Integrated Health Services, Inc.                   218,201              29              24,962            30
Brookdale Living Communities, Inc.                 101,850              13              10,514            13
Mariner Post-Acute Network, Inc.                    75,080              10              12,441            15
All others                                          38,469               5               4,930             6
                                                -------------------------------     -----------------------------
                                                  $759,121             100%            $83,212           100%
                                                ===============================     =============================


<CAPTION>                                                                                   Year Ended
                                                       December 31, 1998                  December 31, 1998
                                                --------------------------------    ------------------------------
                                                  Investment      % of Total          Revenue       % of Total
                                                --------------------------------    ------------------------------
                                                    (dollars in thousands)             (dollars in thousands)

<S>                                              <C>                   <C>            <C>                <C>
Marriott International, Inc.                      $325,521              42%            $30,270            35%
Integrated Health Services, Inc.                   217,893              29              26,841            31
Brookdale Living Communities, Inc.                 101,850              13              11,074            13
Mariner Post-Acute Network, Inc.                    86,486              11              13,620            15
All others                                          38,469               5               4,952             6
                                                --------------------------------    ------------------------------
                                                  $770,219             100%             $86,757          100%
                                                ================================    ==============================

</TABLE>
                                                      F-21




<PAGE>
<TABLE>
<CAPTION>

                                                   Senior Housing Properties Trust
                                                            SCHEDULE III
                                              REAL ESTATE AND ACCUMULATED DEPRECIATION
                                                          December 31, 1998
                                                       (Dollars in thousands)


                                                                      Gross Amount Carried at Close
                              Initial Cost to Company                      of Period 12/31/98
                              -----------------------                --------------------------------
                                                          Costs                                                             Original
                                                       Capitalized                                   Accumulated             Constr-
                                        Buildings and  Subsequent           Buildings and            Depreciation   Date      uction
   Location           State    Land       Equipment  to Acquisition  Land     Equipment    Total (1)     (2)       Aquired     Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>    <C>        <C>             <C>        <C>       <C>         <C>          <C>         <C>         <C>

Mesa                   AZ     $1,480      $13,320        $  --      $1,480    $13,320     $14,800        $680      12/27/96    1985
Phoenix                AZ        655        2,525            5         655      2,530       3,185         471       6/30/92    1963
Scottsdale             AZ        979        8,807          140         990      8,936       9,926       1,033       5/16/94    1990
Sun City               AZ      1,174       10,569          173       1,189     10,727      11,916       1,218       6/17/94    1990
Yuma                   AZ        103          604            1         103        605         708         112       6/30/92    1984
Yuma                   AZ        223        2,100            3         223      2,103       2,326         386       6/30/92    1984
Fresno                 CA        738        2,577          188         738      2,765       3,503         646      12/28/90    1963
Laguna Hills           CA      3,132       28,184          475       3,172     28,619      31,791       3,072        9/9/94    1975
Lancaster              CA        601        1,859        1,028         601      2,887       3,488         610      12/28/90    1969
Newport Beach          CA      1,176        1,729        1,223       1,176      2,952       4,128         592      12/28/90    1962
Stockton               CA        382        2,750            4         382      2,754       3,136         507       6/30/92    1968
Tarzana                CA      1,277          977          806       1,278      1,782       3,060         403      12/28/90    1969
Thousand Oaks          CA        622        2,522          310         622      2,832       3,454         639      12/28/90    1965
Van Nuys               CA        716          378          225         718        601       1,319         154      12/28/90    1969
Canon City             CO        292        6,228           --         292      6,228       6,520         201       9/26/97    1970
Colorado Springs       CO        245        5,236           --         245      5,236       5,481         169       9/26/97    1972
Delta                  CO        167        3,570           --         167      3,570       3,737         115       9/26/97    1963
Grand Junction         CO        204        3,875          329         204      4,204       4,408         650      12/30/93    1968
Grand Junction         CO          6        2,583        1,316         136      3,769       3,905         513      12/30/93    1978
Lakewood               CO        232        3,766          723         232      4,489       4,721         970      12/28/90    1972
Littleton              CO        185        5,043          348         185      5,391       5,576       1,224      12/28/90    1965
Cheshire               CT        520        7,380        1,559         520      8,939       9,459       2,626       11/1/87    1963
Killingly              CT        240        5,360          460         240      5,820       6,060       1,970       5/15/87    1972
New Haven              CT      1,681       14,953        1,236       1,681     16,189      17,870       3,423       5/11/92    1971
Waterbury              CT      1,003        9,023          915       1,003      9,938      10,941       2,097       5/11/92    1974
Waterford              CT         86        4,714          453          86      5,167       5,253       1,814       5/15/87    1965
Willimantic            CT        134        3,566          479         166      4,013       4,179       1,307       5/15/87    1965
Boca Raton             FL      4,404       39,633          799       4,474     40,362      44,836       4,664       5/20/94    1994
Deerfield Beach        FL      1,664       14,972          299       1,690     15,245      16,935       1,762       5/16/94    1986
Fort Myers             FL      2,349       21,137          419       2,385     21,520      23,905       2,354       8/16/94    1984
Palm Harbor            FL      3,327       29,945          591       3,379     30,484      33,863       3,523       5/16/94    1992
Port St. Lucie         FL      1,223       11,009          219       1,242     11,209      12,451       1,295       5/20/94    1993

                                                                S-1
<PAGE>
<CAPTION>

                                                   Senior Housing Properties Trust
                                                            SCHEDULE III
                                              REAL ESTATE AND ACCUMULATED DEPRECIATION
                                                          December 31, 1998
                                                       (Dollars in thousands)


                                                                      Gross Amount Carried at Close
                              Initial Cost to Company                      of Period 12/31/98
                              -----------------------                --------------------------------
                                                          Costs                                                             Original
                                                       Capitalized                                   Accumulated             Constr-
                                        Buildings and  Subsequent           Buildings and            Depreciation   Date      uction
   Location           State    Land       Equipment  to Acquisition  Land     Equipment    Total (1)     (2)       Aquired     Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>    <C>        <C>             <C>        <C>       <C>         <C>          <C>         <C>         <C>
College Park           GA       $300       $2,702          $23        $300     $2,725      $3,025        $220       5/15/96    1985
Dublin                 GA        442        3,982           80         442      4,062       4,504         312       5/15/96    1968
Glenwood               GA        174        1,564            4         174      1,568       1,742         116       5/15/96    1972
Marietta               GA        300        2,702           35         300      2,737       3,037         211       5/15/96    1967
Clarinda               IA         77        1,453          293          77      1,746       1,823         254      12/30/93    1968
Council Bluffs         IA        225          893           99         225        992       1,217         164        4/1/95    1963
Mediapolis             IA         94        1,776          251          94      2,027       2,121         303      12/30/93    1973
Pacific Junction       IA         32          306            5          32        311         343          32        4/1/95    1978
Winterset              IA        111        2,099          493         111      2,592       2,703         375      12/30/93    1973
Arlington Heights      IL      3,621       32,587          534       3,665     33,077      36,742       3,550        9/9/94    1986
Chicago                IL      6,200       55,800           --       6,200     55,800      62,000       2,848      12/27/96    1990
Ellinwood              KS        130        1,137           53         130      1,190       1,320         126        4/1/95    1972
Boston                 MA      2,164       20,836        1,978       2,164     22,814      24,978       6,788        5/1/89    1968
Hyannis                MA        829        7,463           --         829      7,463       8,292       1,677       5/11/92    1972
Middleboro             MA      1,771       15,752           --       1,771     15,752      17,523       3,501        5/1/88    1970
Worcester              MA      1,829       15,071        1,869       1,829     16,940      18,769       5,522        5/1/88    1970
Silver Spring          MD      3,229       29,065          786       3,301     29,779      33,080       3,319       7/25/94    1992
St. Joseph             MO        111        1,027          195         111      1,222       1,333         154        6/4/93    1976
Tarkio                 MO        102        1,938          415         102      2,353       2,455         336      12/30/93    1970
Concord                NC         90        2,126           --          90      2,126       2,216         483       9/10/98    1990
Wilson                 NC         27        2,375           --          27      2,375       2,402         538       9/10/98    1990
Winston-Salem          NC         75        1,696           --          75      1,696       1,771         381       9/10/98    1990
Grand Island           NE        119        1,446          369         119      1,815       1,934         150        4/1/95    1963
Burlington             NJ      1,300       11,700            7       1,300     11,707      13,007         952       9/29/95    1994
Brighton               NY      1,070        9,630           --       1,070      9,630      10,700         492      12/27/96    1988
Grove City             OH        332        3,081           32         332      3,113       3,445         430        6/4/93    1965
Canonsburg             PA      1,499       13,493          606       1,518     14,080      15,598       3,622        3/1/91    1985
Huron                  SD         45          968            1          45        969       1,014         177       6/30/92    1968
Huron                  SD        144        3,108            4         144      3,112       3,256         567       6/30/92    1968
Sioux Falls            SD        253        3,062            4         253      3,066       3,319         561       6/30/92    1960
Bellaire               TX      1,223       11,010          177       1,238     11,172      12,410       1,291       5/16/94    1991
Arlington              VA      1,859       16,734          296       1,885     17,004      18,889       1,895       7/25/94    1992

                                                                S-2
<PAGE>
<CAPTION>

                                                   Senior Housing Properties Trust
                                                            SCHEDULE III
                                              REAL ESTATE AND ACCUMULATED DEPRECIATION
                                                          December 31, 1998
                                                       (Dollars in thousands)


                                                                      Gross Amount Carried at Close
                              Initial Cost to Company                      of Period 12/31/98
                              -----------------------                --------------------------------
                                                          Costs                                                             Original
                                                       Capitalized                                   Accumulated             Constr-
                                        Buildings and  Subsequent           Buildings and            Depreciation   Date      uction
   Location           State    Land       Equipment  to Acquisition  Land     Equipment    Total (1)     (2)       Aquired     Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>    <C>        <C>             <C>        <C>       <C>         <C>          <C>         <C>         <C>
Charlottesville        VA     $2,936      $26,422         $471      $2,976    $26,853     $29,829      $3,048       6/17/94    1991
Virginia Beach         VA        881        7,926          141         893      8,055       8,948         931       5/16/94    1990
Seattle                WA        256        4,869           67         256      4,936       5,192         785       11/1/93    1964
Spokane                WA      1,035       13,315           --       1,035     13,315      14,350         581        5/7/97    1993
Brookfield             WI        834        3,849        8,014         834     11,863      12,697       1,928      12/28/90    1964
Clintonville           WI         14        1,695           38          14      1,733       1,747         389      12/28/90    1960
Clintonville           WI         49        1,625           87          30      1,731       1,761         387      12/28/90    1965
Madison                WI        144        1,633          110         144      1,743       1,887         390      12/28/90    1920
Milwaukee              WI        232        1,368            1         232      1,369       1,601         281       9/10/98    1970
Milwaukee              WI        277        3,883           --         277      3,883       4,160         769       3/27/92    1969
Pewaukee               WI        984        2,432           --         984      2,432       3,416         518       9/10/98    1963
Waukesha               WI         68        3,452        2,232          68      5,684       5,752       1,036      12/28/90    1958
Laramie                WY        191        3,632          199         191      3,831       4,022         595      12/30/93    1964
Worland                WY        132        2,503          588         132      3,091       3,223         431      12/30/93    1970
                             --------------------------------------------------------------------------------
  Total                      $69,030     $628,080      $35,283     $69,673   $662,720    $732,393     $94,616
                             ================================================================================
<FN>
(1)      Aggregate cost for federal income tax purposes is approximately $706,576.
(2)      Depreciation  is provided for on buildings and  improvements  for periods  ranging up to 40 years and on equipment up to 12
         years.
</FN>
</TABLE>

Reconciliation  of  the  carrying  amount  of  real  estate  and  equipment  and
accumulated depreciation at the beginning of the period:

                                 Real Estate and        Accumulated
                                    Equipment          Depreciation
                                 ---------------      --------------
Balance at January 1, 1996          $586,940             $ 41,004
   Additions                         105,094               15,383
                                    --------             --------
Balance at December 31, 1996         692,034               56,387
   Additions                          28,953               17,826
                                    --------             --------
Balance at December 31, 1997         720,987               74,213
   Additions                          11,406               20,403
                                    --------             --------
Balance at December 31, 1998        $732,393             $ 94,616
                                    ========             ========


                                      S-3

<PAGE>
<TABLE>
<CAPTION>

                                                   Senior Housing Properties Trust
                                                             SCHEDULE IV
                                                    MORTGAGE LOANS ON REAL ESTATE
                                                          December 31, 1998
                                                       (Dollars in thousands)

                                                                                                                Principal Amount of
                             Final                                                       Face       Carrying     Loans Subject to
                  Interest  Maturity                                                    Value of    Value of    Delinquent Principal
Location           Rate      Date       Periodic Payment Terms                          Mortgage   Mortgage (1)     or Interest
- ----------------- --------- ----------- ------------------------------------------------------------------------------------------


<S>                <C>       <C>        <C>                                             <C>            <C>           <C>

Farmington, MI      11.50%     1/1/06    Principal and interest, payable monthly in      $4,200         $4,200        $--
                                         arrears.  $3.8 million due at maturity.

Howell, MI          11.50%     1/1/06    Principal and interest, payable monthly in       4,982          4,982         --
                                         arrears.  $4.5 million due at maturity.

Lyons, NE           10.09%    12/31/16   Principal and interest, payable monthly in       1,563          1,563         --
Milford, NE                              arrears. $835 due at maturity.

Ainsworth, NE       10.64%    12/31/16   Principal and interest, payable monthly in       5,154          5,154         --
Ashland, NE                              arrears.  $2.8 million due at maturity.
Blue Hill, NE
Gretna, NE
Sutherland, NE
Waverly, NE

Ainsworth, NE       11.00%    12/31/16   Principal and interest, payable monthly in       2,052          2,052         --
Ashland, NE                              arrears.  $1.1 million due at maturity.
Blue Hill, NE
Edgar, NE
Gretna, NE
Sutherland, NE
Waverly, NE
Lyons, NE
Milford, NE

Slidell, LA         11.00%    12/31/10   Principal and interest, payable monthly in      18,992         18,992         --
                                         arrears.  $13.9 million due at maturity.

Milwaukee, WI       13.75%     1/31/13   Interest only, payable monthly in arrears.         883            883         --
                                         $883 due at maturity.
                                                                                        ---------------------------------
                                                                                        $37,826        $37,826        $--
                                                                                        =================================
<FN>
(1) Also represents cost for federal income tax purposes.
</FN>
</TABLE>

                                                                 S-4


<PAGE>

                         Senior Housing Properties Trust
                                   SCHEDULE IV
                          MORTGAGE LOANS ON REAL ESTATE
                                December 31, 1998
                             (dollars in thousands)



Reconciliation  of the carrying amount of mortgage loans at the beginning of the
period:

Balance at January 1, 1996                   $ 37,798
   New mortgage loans                             700
   Collections of principal                      (228)
                                             --------
Balance at December 31, 1996                   38,270
   New mortgage loans                             124
   Collections of principal                      (260)
                                             --------
Balance at December 31, 1997                   38,134
   Collections of principal                      (308)
                                             --------
Balance at December 31, 1998                 $ 37,826
                                             ========



- -------------------------------------------------------------------------------




                                 Other Schedules


         Other schedules have been omitted since the required information is not
present or not  present  in amounts  sufficient  to  require  submission  of the
schedule,  or because the  information  required  is  included  in the  combined
financial statements, including notes thereto.




                                      S-5

<PAGE>
                  Senior Housing Properties After the Spin-Off


[Photograph of Building]                      [Photograph of Building]
Marriott International, Inc.                  Brookdale Living Communities, Inc.
Stratford Court of Boca Raton                 Park Place
Boca Raton, FL                                Spokane, WA
349 Units, Built 1994                         200 Units, Built 1993


                         [Photograph of Building]
                         Marriott International, Inc.
                         Brighton Gardens of Sun City
                         Sun City, AZ
                         148 Units, Built 1990






                         [Photograph of Building]
                         Brookdale Living Communities, Inc.
                         The Hallmark
                         Chicago, IL
                         341 Units, Built 1990




[Photograph of Building]                       [Photograph of Building]
Mariner Post-Acute Network, Inc.               Integrated Health Services, Inc.
La Mesa Care Center                            Blue Hill Care Center
Yuma, AZ                                       Blue Hill, NE
128 Units, Built 1984                          81 Units, Built 1967

<PAGE>




- ------------------------------------------------------------------------------










                              HRPT Properties Trust

                                    Spin-Off

                                       of

                         Senior Housing Properties Trust

                              Through Distribution

                                       of

                                   13,190,763

                      Common Shares of Beneficial Interest


                      ------------------------------------


                                   PROSPECTUS

                      ------------------------------------



                               ___________ , 1999


- ------------------------------------------------------------------------------

<PAGE>


                                     PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

Item 31.   Other Expenses of Issuance and Section Distribution.


         The following  table itemizes the expenses  incurred in connection with
the  distribution of the common shares being  registered.  All of these expenses
will be paid by HRPT  Properties  Trust.  All the  amounts  shown are  estimates
except the Securities and Exchange Commission  registration fee and the New York
Stock Exchange listing fee.


         Item                                                         Amount


         SEC Registration Fee......................................   $78,952
         New York Stock Exchange Listing Fee.......................   158,100
         Transfer Agent's and Registrar's Fees.....................    30,000
         Printing and Engraving Fees...............................   200,000
         Legal Fees and Expenses (other than Blue Sky).............   750,000
         Accounting Fees and Expenses..............................   200,000
         Blue Sky Fees and Expenses (including fees of counsel)....    10,000
         Miscellaneous Expenses....................................    50,000
                                                                   ----------
         Total.....................................................$1,477,052
                                                                   ==========


Item 32.   Sales to Special Parties.

         See Item 33.

Item 33.   Recent Sales of Unregistered Securities.

         On December 16, 1998, Senior Housing was initially  capitalized through
the  issuance of  26,374,760  shares to HRPT  Properties  Trust in exchange  for
$263,747.60.  HRPT is currently  the sole  shareholder  of Senior  Housing.  The
26,374,760  shares  currently  outstanding were purchased for investment and for
the purpose of organizing  Senior Housing.  On July 30, 1999,  HRPT  surrendered
374,760 Senior Housing shares and they were cancelled and returned to the status
of authorized but unissued.  Senior Housing  believes that the issuance and sale
of these securities are exempt from registration pursuant to Section 4(2) of the
Securities Act of 1933, as amended.

Item 34.   Indemnification of Directors and Officers.

         The Maryland REIT law permits a Maryland real estate  investment  trust
to include in its Declaration of Trust a provision limiting the liability of its
trustees and officers to the trust and its shareholders for money damages except
for liability resulting from (a) actual receipt of an improper benefit or profit
in  money,  property  or  services  or  (b)  active  and  deliberate  dishonesty
established by a final  judgment as being  material to the cause of action.  The
Declaration  of  Trust  of  Senior  Housing  contains  such  a  provision  which
eliminates  such liability to the maximum extent  permitted by the Maryland REIT
law.

         The Declaration of Trust of Senior Housing  requires it, to the maximum
extent permitted by Maryland law, to indemnify,  and pay or reimburse reasonable
expenses in advance of final  disposition of a proceeding to, (a) any individual
who is a present  or former  trustee  or  officer  of Senior  Housing or (b) any
individual  who,  while a trustee of Senior Housing and at the request of Senior
Housing,  serves or has  served as a  trustee,  director,  officer or partner of
another real estate investment trust, corporation,  partnership,  joint venture,
trust,  employee  benefit plan or other enterprise from and against any claim or
liability to which such person may become subject or which such person may incur
by reason of his or her  status or  actions  as a present  or former  trustee or
officer of Senior  Housing.  The Bylaws of Senior  Housing  obligate  it, to the
maximum  extent  permitted by Maryland  law, to indemnify  any present or former
Trustee or officer  (including  any individual who while a Trustee or officer at
the express  request of Senior  Housing serves or has served another real estate
investment  trust,  corporation,  partnership,  joint venture,  trust,  employee
benefit  plan or any  other  enterprise  as a  director,  officer,  shareholder,
partner  or  trustee  of  such  real  estate  investment   trust,   corporation,
partnership,  joint venture,  trust,  employee benefit plan or other enterprise)
(a) who has been  successful,  on the merits or  otherwise,  in the defense of a
proceeding  to which he was made a party by reason of such  status or service in
such capacity,  against  reasonable  expenses incurred by him in connection with
the  proceeding  and (b) against any claim or  liability  to which he may become
subject by reason of such status or actions in such capacity. The Declaration of
Trust and Bylaws also permit Senior Housing to indemnify and advance expenses to
any person who

                                      II-1
<PAGE>

served a predecessor of Senior Housing in any of the capacities  described above
and to any  employee  or agent of  Senior  Housing  or a  predecessor  of Senior
Housing. The Bylaws require Senior Housing to indemnify a trustee or officer who
has  been  successful,  on  the  merits  or  otherwise,  in the  defense  of any
proceeding  to  which  he is made a  party  by  reason  of his  service  in that
capacity.

         The Maryland REIT law permits a Maryland real estate  investment  trust
to indemnify  and advance  expenses to its  trustees,  officers,  employees  and
agents to the same extent as permitted by the Maryland  General  Corporation Law
(the  AMGCL@) for  directors  and  officers of Maryland  corporations.  The MGCL
permits a  corporation  to  indemnify  its  present  and  former  directors  and
officers,  among others, against judgments,  penalties,  fines,  settlements and
reasonable  expenses actually incurred by them in connection with any proceeding
to which  they may be made a party by reason of their  service in those or other
capacities unless it is established that (a) the act or omission of the director
or officer was material to the matter giving rise to the  proceeding and (i) was
committed  in bad  faith  or (ii)  was  the  result  of  active  and  deliberate
dishonesty,  (b) the director or officer actually  received an improper personal
benefit  in  money,  property  or  services  or (c) in the case of any  criminal
proceeding, the director or officer had reasonable cause to believe that the act
or omission was unlawful.  However,  under the MGCL, a Maryland  corporation may
not indemnify a director for an adverse judgment in a suit by or in the right of
the  corporation  or for a judgment  of  liability  on the basis  that  personal
benefit  was  improperly  received,   unless  in  either  case  a  court  orders
indemnification  and then only for  expenses.  In  addition,  the MGCL permits a
corporation  to advance  reasonable  expenses to a director or officer  upon the
corporation's receipt of (a) a written affirmation by the director or officer of
his good faith  belief  that he has met the  standard of conduct  necessary  for
indemnification  by the corporation  and (b) a written  undertaking by him or on
his behalf to repay the amount paid or reimbursed by the corporation if it shall
ultimately be determined that the standard of conduct was not met.

Item 35.    Treatment of Proceeds From Shares Being Registered.

         Senior Housing will not receive any proceeds from the  distribution  of
the common shares being  registered,  because they are being distributed by HRPT
to its shareholders.

Item 36.    Financial Statements and Exhibits.

(a)      Financial Statements.

         Reference is made to Page F-1 of the  Prospectus  filed as part of this
Registration Statement.

(b)      Exhibits.


2.1      Form of Transaction  Agreement between Senior Housing  Properties Trust
         and HRPT  Properties  Trust.  (Previously  filed as an  exhibit  to the
         registration statement)

3.1      Declaration of Trust of Senior Housing  Properties Trust dated December
         16,  1998.   (Previously  filed  as  an  exhibit  to  the  registration
         statement)

3.2      Form of Amended and  Restated  Declaration  of Trust of Senior  Housing
         Properties  Trust.  (Previously filed as an exhibit to the registration
         statement)

3.3      Bylaws of Senior  Housing  Properties  Trust.  (Previously  filed as an
         exhibit to the registration statement)

3.4      Form of Amended and Restated Bylaws of Senior Housing Properties Trust.
         (Previously filed as an exhibit to the registration statement)

4.1      Form of share certificate  representing common shares of Senior Housing
         Properties  Trust.  (Previously filed as an exhibit to the registration
         statement)

5.1      Opinion of Sullivan & Worcester LLP. (Previously filed as an exhibit to
         the registration statement)


5.2      Opinion of Ballard Spahr Andrews & Ingersoll, LLP. (Previously filed as
         an exhibit to the registration statement)

8.1      Opinion of Sullivan & Worcester LLP re: tax matters.  (Filed herewith)

                                      II-2
<PAGE>

10.1     Form of Advisory Agreement between Senior Housing and Reit Management &
         Research,  Inc.  (Previously  filed as an exhibit  to the  registration
         statement)

10.2     Form of Senior  Housing  Properties  Trust 1999  Incentive  Share Award
         Plan. (Previously filed as an exhibit to the registration statement)

10.3     Form of Promissory Note from SPTMRT Properties Trust, as maker, to HRPT
         Properties Trust, as holder. (Contained in Exhibit 2.1)

10.4     Commitment  Letter and Summary of Terms and Conditions for $350 million
         Secured Credit Facility from Dresdner Bank to Senior Housing Properties
         Trust. (Previously filed as an exhibit to the registration statement)

10.5     Master Lease Agreement,  dated as of December 27, 1996,  between Health
         and  Retirement  Properties  Trust and BLC Property,  Inc.  (Previously
         filed as an exhibit to the registration statement)

10.6     Guaranty Agreement,  dated as of December 27, 1996, by Brookdale Living
         Communities,  Inc.,  Brookdale  Living  Communities of Illinois,  Inc.,
         Brookdale  Living  Communities of New York,  Inc., and Brookdale Living
         Communities  of  Arizona,  Inc.  in  favor  of  Health  and  Retirement
         Properties  Trust.  (Previously filed as an exhibit to the registration
         statement)

10.7     First  Amendment to Master Lease  Agreement and  Incidental  Documents,
         dated as of May 7, 1997, by and among Health and Retirement  Properties
         Trust, BLC Property,  Inc., Brookdale Living Communities of Washington,
         Inc.,  Brookdale Living Communities of Arizona,  Inc., Brookdale Living
         Communities  of Illinois,  Inc.,  Brookdale  Living  Communities of New
         York, Inc.,  Brookdale Living Communities,  Inc, The Prime Group, Inc.,
         Prime International, Inc., PGLP, Inc., Prime Group Limited Partnership,
         and  Prime  Group  II,  L.P.  (Previously  filed as an  exhibit  to the
         registration statement)

10.8     Representative  Lease for properties leased to subsidiaries of Marriott
         International, Inc. (Previously filed as an exhibit to the registration
         statement)

10.9     Representative  Guaranty of Tenant Obligations,  dated as of October 8,
         1993,  by  Marriott  International,  Inc.  in favor  of HMC  Retirement
         Properties,  Inc.  (Previously  filed as an exhibit to the registration
         statement)

10.10    Representative  First  Amendment  to Lease  for  properties  leased  to
         subsidiaries of Marriott  International,  Inc.  (Previously filed as an
         exhibit to the registration statement)

10.11    Representative  Assignment  and  Assumption of Leases,  Guarantees  and
         Permits   for   properties   leased   to   subsidiaries   of   Marriott
         International, Inc. (Previously filed as an exhibit to the registration
         statement)

10.12    Representative  Second  Amendment  of Lease  for  properties  leased to
         subsidiaries of Marriott  International,  Inc.  (Previously filed as an
         exhibit to the registration statement)

10.13    Representative  First Amendment of Guaranty by Marriott  International,
         Inc., dated as of May 16, 1994, in favor of HMC Retirement  Properties,
         Inc. (Previously filed as an exhibit to the registration statement)

10.14    Assignment  of  Lease,  dated as of June 16,  1994,  by HMC  Retirement
         Properties,  Inc.  in favor of  Health  and  Rehabilitation  Properties
         Trust. (Previously filed as an exhibit to the registration statement)

10.15    Third Amendment to Facilities Lease, dated as of June 30, 1994, between
         HMC Retirement  Properties,  Inc. and Marriott Senior Living  Services,
         Inc. (Previously filed as an exhibit to the registration statement)

10.16    Third Amendment to Facilities Lease, dated as of June 30, 1994, between
         HMC Retirement  Properties,  Inc. and Marriott Senior Living  Services,
         Inc. (Previously filed as an exhibit to the registration statement)

10.17    Consent  and  Modification  Agreement,  dated as of October  10,  1997,
         between Marriott International,  Inc., Marriott Senior Living Services,
         Inc., New Marriott MI, Inc.,  Health and Retirement  Properties  Trust,
         and Church Creek  Corporation.  (Previously  filed as an exhibit to the
         registration statement)

                                      II-3
<PAGE>

10.18    Master  Lease  Document,  General  Terms  and  Conditions  dated  as of
         December 28, 1990, between Health and  Rehabilitation  Properties Trust
         and  AMS  Properties,  Inc.  (Previously  filed  as an  exhibit  to the
         registration statement)

10.19    Representative  Lease  for  properties  leased  to  Mariner  Post-Acute
         Network,  Inc.  (Previously  filed as an  exhibit  to the  registration
         statement)

10.20    Lease dated as of March 27,  1992,  between  Health and  Rehabilitation
         Properties  Trust  and AMS  Properties,  Inc.  (Previously  filed as an
         exhibit to the registration statement)

10.21    Amendment  to Master  Lease  Document  dated as of  December  29,  1993
         between Health and Rehabilitation  Properties Trust and AMS Properties,
         Inc. (Previously filed as an exhibit to the registration statement)

10.22    Amendment to AMS Properties,  Inc.  Facility Leases dated as of October
         1,  1994  between  Health  and  Retirement  Properties  Trust  and  AMS
         Properties,  Inc.  (Previously  filed as an exhibit to the registration
         statement)

10.23    Amendment to AMS  Properties,  Inc.  Facility  Leases dated October 31,
         1997 between Health and Retirement Properties Trust and AMS Properties,
         Inc. (Previously filed as an exhibit to the registration statement)

10.24    Representative  Lease  for  properties  leased  to  Mariner  Post-Acute
         Network,  Inc.  (Previously  filed as an  exhibit  to the  registration
         statement)

10.25    Master Lease  Agreement dated as of June 30, 1992 by and between Health
         and Rehabilitation  Properties Trust and GCI Health Care Centers,  Inc.
         (Previously filed as an exhibit to the registration statement)

10.26    Amended and Restated HRP Shares Pledge Agreement,  dated as of June 30,
         1992,   between  Health  and  Retirement   Properties   Trust  and  AMS
         Properties, Inc. (Filed herewith)

10.27    Amended and Restated Voting Trust Agreement,  dated as of June 30, 1992
         from AMS  Properties,  Inc. to HRPT Advisors,  Inc., as voting trustee.
         (Filed herewith)

10.28    Representative  Lease  for  properties  leased  to  Mariner  Post-Acute
         Network,  Inc.  (Previously  filed as an  exhibit  to the  registration
         statement)

10.29    Representative  Lease  for  properties  leased  to  Mariner  Post-Acute
         Network,  Inc.  (Previously  filed as an  exhibit  to the  registration
         statement)

10.30    Amendment  to Master  Lease  Document  dated as of  December  29,  1993
         between Health and Rehabilitation  Properties Trust and GCI Health Care
         Centers,  Inc.  (Previously  filed as an  exhibit  to the  registration
         statement)

10.31    Amendment to GCI Health Care Centers,  Inc.,  Master Lease Document and
         Facility  Leases  dated  as of  October  1,  1994  between  Health  and
         Retirement Properties Trust and GCI Health Care Centers, Inc.
         (Previously filed as an exhibit to the registration statement)

10.32    Amendment  to GCI Health  Care  Centers,  Inc.  Facility  Leases  dated
         October 31, 1997 between Health and Retirement Properties Trust and GCI
         Health  Care  Centers,  Inc.  (Previously  filed as an  exhibit  to the
         registration statement)

10.33    Guaranty, Cross Default and Cross Collateralization Agreement, dated as
         of June 30, 1992, by and among AMS  Properties,  Inc.,  CGI Health Care
         Centers, Inc. and Health and Rehabilitation Properties Trust.
         (Previously filed as an exhibit to the registration statement)

10.34    Guaranty,  dated as of October 31, 1997,  by Grancare  Inc. in favor of
         Health and Retirement Properties Trust. (Previously filed as an exhibit
         to the registration statement)

10.35    Guaranty, dated as of October 31, 1997, by Paragon Health Network, Inc.
         in favor of Health and Retirement  Properties Trust.  (Previously filed
         as an exhibit to the registration statement)

                                      II-4
<PAGE>

10.36    Amended,  Restated and Consolidated Master Lease Document,  dated as of
         September 24, 1997, between Health and Retirement  Properties Trust and
         ECA Holdings, Inc., Marietta/SCC, Inc., Glenwood/SCC, Inc., Dublin/SCC,
         Inc., and College Park/SCC, Inc. (Previously filed as an exhibit to the
         registration statement)

10.37    Guaranty By Integrated Health Services, Inc., dated as of September 24,
         1997,  by  Integrated  Health  Services,  Inc.,  in favor of Health and
         Retirement  Properties  Trust.  (Previously  filed as an exhibit to the
         registration statement)

10.38    Representative  Lease  Agreement  for  properties  leased to Integrated
         Health  Services,   Inc.   (Previously  filed  as  an  exhibit  to  the
         registration statement)

10.39    Representative  Lease  Agreement  for  properties  leased to Integrated
         Health  Services,   Inc.   (Previously  filed  as  an  exhibit  to  the
         registration statement)

10.40    Guaranty,   dated  as  of  February  11  1994,  by  Horizon  Healthcare
         Corporation  in favor of Health and  Rehabilitation  Properties  Trust.
         (Previously filed as an exhibit to the registration statement)

10.41    Consent,  Assumption and Guaranty  Agreement,  dated as of December 31,
         1997, by and among Integrated  Health  Services,  Inc., IHS Acquisition
         No. 108, Inc., IHS  Acquisition No. 112, Inc., IHS Acquisition No. 113,
         Inc., IHS Acquisition No. 135, Inc., IHS Acquisition No. 148, Inc., IHS
         Acquisition   No.  152,  Inc.,  IHS  Acquisition  No.  153,  Inc.,  IHS
         Acquisition   No.  154,  Inc.,  IHS  Acquisition  No.  155,  Inc.,  IHS
         Acquisition No. 175, Inc., Healthsouth Corporation,  Horizon Healthcare
         Corporation,  Health and  Retirement  Properties  Trust,  and Indemnity
         Collection  Corporation.   (Previously  filed  as  an  exhibit  to  the
         registration statement)

21.1     List  of  Subsidiaries.   (Previously   filed  as  an  exhibit  to  the
         registration statement)

23.1     Consent of Ernst & Young LLP.  (Filed herewith)

23.2     Consent of Sullivan & Worcester  LLP.  (Contained  in Exhibits  5.1 and
         8.1)

24.1     Power of Attorney.  (See signature page to the registration statement)


27.1     Financial  Data  Schedule.  (Previously  filed  as an  exhibit  to  the
         registration statement)

27.2     Financial  Data  Schedule.  (Previously  filed  as an  exhibit  to  the
         registration statement)

27.3     Financial Data Schedule.  (Filed herewith)


99.1     Consent of Bruce M. Gans,  M.D.  to being  named as a Trustee  nominee.
         (Previously filed as an exhibit to the registration statement)

99.2     Consent of Arthur G.  Koumantzelis to being named as a Trustee nominee.
         (Previously filed as an exhibit to the registration statement)

Item 37.   Undertakings.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933, as amended, may be permitted to trustees,  officers and controlling
persons of Senior Housing  pursuant to the foregoing  provisions,  or otherwise,
Senior  Housing  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the Securities Act of 1933, as amended, and is, therefore,  unenforceable. In
the event that a claim for indemnification  against such liabilities (other than
the payment by Senior Housing of expenses incurred or paid by a trustee, officer
or  controlling  persons  of Senior  Housing  in the  successful  defense of any
action, suit or proceeding) is asserted by such trustee,  officer or controlling
person in connection with the securities being registered,  Senior Housing will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent, submit to a court of appropriate jurisdiction the question of whether
such indemnification is against public policy as expressed in the Securities Act
of 1933,  as amended,  and will be governed  by the final  adjudication  of such
issue.

                                      II-5
<PAGE>

         The undersigned registrant hereby undertakes that:

         (1) For purposes of determining  any liability under the Securities Act
of 1933, as amended,  the information  omitted from the form of prospectus filed
as part of this registration  statement in reliance upon Rule 430A and contained
in a form of prospectus  filed by the  registrant  pursuant to Rule 424(b)(1) or
(4) or 497(h) under the Securities  Act of 1933, as amended,  shall be deemed to
be part of this registration statement as of the time it was declared effective.

         (2) For the purpose of determining  any liability  under the Securities
Act of 1933, as amended,  each post-effective  amendment that contains a form of
prospectus  shall be deemed to be a new registration  statement  relating to the
securities  offered  therein,  and the offering of such  securities at that time
shall be deemed to be the initial bona fide offering thereof.






                                      II-6



<PAGE>


                                   SIGNATURES


     Pursuant to the  requirements  of the  Securities  Act of 1933, as amended,
Senior Housing certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on Form  S-11  and has duly  caused  this
registration statement to be signed on its behalf by the undersigned,  thereunto
duly  authorized,  in the City of  Newton,  Commonwealth  of  Massachusetts,  on
September 7, 1999.



                                    SENIOR HOUSING PROPERTIES TRUST



                                    By: /s/ David J. Hegarty
                                        David J. Hegarty
                                        President and
                                        Chief Operating Officer



     Pursuant to the  requirements  of the  Securities  Act of 1933, as amended,
this  Registration  Statement has been signed below by the following  persons on
behalf of Senior Housing and in the capacities and on the dates indicated.



Signature                       Title                             Date
- ---------                       -----                             ----


    *                       Managing Trustee                  September 7, 1999
Barry M. Portnoy



    *                       Managing Trustee                  September 7, 1999
Gerard M. Martin



/s/ David J. Hegarty        President and Chief Operating     September 7, 1999
David J. Hegarty            Officer



    *                       Chief Financial Officer and       September 7, 1999
Ajay Saini                  Treasurer




*By:   /s/ David J. Hegarty
       David J. Hegarty
       as attorney in fact

                                      II-7


                                                                     Exhibit 8.1

                              SULLIVAN & WORCESTER LLP
                               ONE POST OFFICE SQUARE
                             BOSTON, MASSACHUSETTS 02109
                                   (617) 338-2800
                                FAX NO. 617-338-2880
     IN WASHINGTON, D.C.                                   IN NEW YORK CITY
1025 CONNECTICUT AVENUE, N.W.                              767 THIRD AVENUE
   WASHINGTON, D.C. 20036                              NEW YORK, NEW YORK 10017
       (202) 775-8190                                       (212) 486-8200
    FAX NO. 202-293-2275                                 FAX NO. 212-758-2151










                                            September 7, 1999





Senior Housing Properties Trust
400 Centre Street
Newton, Massachusetts  02458

Ladies and Gentlemen:

         In connection with the registration by Senior Housing Properties Trust,
a Maryland real estate investment trust (the "Company"), of its common shares of
beneficial interest proposed to be distributed by HRPT Properties Trust ("HRPT")
to the  shareholders of HRPT, the following  opinion is furnished to the Company
to be filed with the Securities and Exchange  Commission  (the "SEC") as Exhibit
8.1 to the Company's  Registration  Statement on Form S-11,  File No. 333- 69703
(the  "Registration  Statement"),  under the  Securities Act of 1933, as amended
(the "Act").

         We have  acted  as  counsel  for the  Company  in  connection  with the
Registration  Statement.  In  connection  with this  opinion,  we have  examined
originals or copies of the Registration  Statement,  the respective declarations
of trust and bylaws of the Company and of HRPT, as currently in effect, and such
corporate  records,  certificates  and statements of officers of the Company and
HRPT, accountants for the Company and public officials, and such other documents
as we have considered  necessary in order to furnish the opinion hereinafter set
forth.  With  respect to all  questions  of fact on which the  opinion set forth
below is based, we have assumed the accuracy and completeness of and have relied
on the information set forth in the Registration  Statement and in the documents
incorporated  therein by  reference,  and on  representations  made to us by the
officers  of the  Company  and HRPT.  We have not  independently  verified  such
information.

         The opinion set forth below is based upon the Internal  Revenue Code of
1986,  as  amended,  the  Treasury  Regulations  issued  thereunder,   published
administrative  interpretations  thereof,  and judicial  decisions  with respect
thereto, all as of the date hereof (collectively,  the "Tax Laws"), and upon the
Employee  Retirement Income Security Act of 1974, as amended,  the Department of
Labor regulations issued thereunder,  published  administrative  interpretations
thereof,  and judicial decisions with respect thereto, all as of the date hereof
(collectively, the "ERISA Laws"). No assurance can be given that the Tax Laws or
the ERISA Laws will not change. In preparing the discussions with respect to Tax
Laws and  ERISA  Laws  matters  in the  section  of the  Registration  Statement
captioned "Federal Income Tax and ERISA


<PAGE>


Senior Housing Properties Trust
September 7, 1999
Page 2


Consequences," we have made certain assumptions and expressed certain conditions
and  qualifications   therein,   all  of  which   assumptions,   conditions  and
qualifications are incorporated herein by reference.

         Based upon and subject to the foregoing, we are of the opinion that the
discussion with respect to Tax Laws and ERISA Laws matters in the section of the
Registration Statement captioned "Federal Income Tax and ERISA Consequences," in
all material  respects is accurate and fairly summarizes the Tax Laws issues and
ERISA Laws issues  addressed  therein,  and hereby  confirm that the opinions of
counsel  referred  to in said  sections  represent  our  opinions on the subject
matter thereof.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement and to the  references  to our firm in the  Registration
Statement.  In giving such consent,  we do not thereby admit that we come within
the category of persons whose consent is required  under Section 7 of the Act or
under the rules and regulations of the SEC promulgated thereunder.

                                                Very truly yours,



                                                /s/ SULLIVAN & WORCESTER LLP
                                                SULLIVAN & WORCESTER LLP



                                                                   EXHIBIT 10.26

                         AMENDED AND RESTATED HRP SHARES
                                PLEDGE AGREEMENT


         THIS AMENDED AND RESTATED HRP SHARES PLEDGE  AGREEMENT  made as of June
30,  1992,  (this  "Agreement")   between  AMS  PROPERTIES,   INC.,  a  Delaware
corporation  having its  principal  place of business at 300  Corporate  Pointe,
Suite 300, Culver City, CA 90230 (the,  "Pledgor") and HEALTH AND REHABILITATION
PROPERTIES  TRUST,  a Maryland real estate  investment  trust having a principal
address at 400 Centre Street,  Newton,  Massachusetts  02158 ("HRP"), as pledgee
(in such capacity, together with its successors and assigns, the "Pledgee").

                                   WITNESSETH:

         WHEREAS,  pursuant to an Acquisition Agreement,  Agreement to Lease and
Mortgage  Loan  Agreement  dated  as of  December  28,  1990 (as the same may be
amended,  modified  or  supplemented  from  time to time,  the "AMS  Acquisition
Agreement")  among American medical  Services,  Inc.  ("AMS'),  AMS Holding Co.,
GranCare,  Inc.  (f/k/a  HostMasters,  Inc.)  ("GranCare"),  the Pledgor and the
Pledgee,  the Pledgee  made a loan to the Pledgor in the sum of Fifteen  Million
Dollars  ($15,000,000)  which loan is evidenced by a promissory note dated as of
December  28, 1990 (as the same may be amended,  modified or  supplemented  from
time to time,  the  "Note")  made by the Pledgor and payable to the order of the
Pledgee;

         WHEREAS,  pursuant  to  the  AMS  Acquisition  Agreement,  the  Pledgee
acquired from AMS certain real and personal property more particularly described
therein  (hereinafter,  the "AMS Leased  Properties")  and, pursuant to a master
lease  agreement  dated as of December 28, 1990 by and between the  Pledgor,  as
tenant, and the Pledgee,  as landlord,  and the facility leases thereunder (such
master  lease  agreement  and  facility  leases,  as the  same  may be  amended,
modified, or supplemented from time to time, collectively, the "AMS Lease"), the
Pledgee leased the AMS Leased Properties back to the Pledgor;

         WHEREAS,  in  connection  with  the  execution  of the AMS  Acquisition
Agreement,  the  Pledgor  pledged  One  Million  (1,000,000)  common  shares  of
beneficial  interest,  $.0l  par  value,  of HRP  registered  in the name of the
Pledgor with HRPT Advisors,  Inc., a Delaware corporation  ("Advisors") in trust
pursuant to the terms and  conditions  of that certain  Voting  Trust  Agreement
dated as of December 28, 1990,  (the "Original  Voting Trust  Agreement") to the
Pledgee  pursuant  to that  certain  HRP  Shares  Pledge  Agreement  dated as of
December 28, 1990 (the "Original HRP Shares Pledge Agreement");  and the Pledgor
further  agreed,  pursuant to the terms and  conditions  of the Original  Voting
Trust Agreement,  to deposit with Advisors in trust certain additional shares of
capital stock
<PAGE>
                                      -2-

of HRP, or securities convertible into or exchangeable for capital stock of HRP,
acquired by it after the date thereof as provided therein;

         WHEREAS,  pursuant  to a letter  agreement  dated  April 10,  1992 (the
"Letter  Agreement"),  between  GranCare and the Pledgee,  the Pledgee agreed to
enter into a  long-term  lease with GCI Health Care  Centers,  Inc.  ("GCI"),  a
Delaware  corporation and wholly owned  subsidiary of GranCare,  with respect to
certain real  property,  and the related  improvements  and  personal  property,
located in Arizona,  California and South Dakota and more particularly described
therein pursuant to leases of even date herewith,  each of which incorporates by
reference  a master  lease  document  of even date  herewith  by and between the
Pledgee, as landlord and GCI, as tenant (as such leases may be amended, modified
or  supplemented  from time to time, the "GCI Lease",  and together with the AMS
Lease, the "Leases");

         WHEREAS,  the Pledgee  has agreed to enter into the GCI Lease  provided
that the  Pledgor,  which  company  is  under  common  control  with GCI and has
heretofore  entered  into  sale-leaseback,  mortgage  financing  and/or  leasing
transactions  with the Pledgee,  agrees to guarantee  payment and performance of
GCI's  obligations  to the Pledgee and to certain  cross  collateralization  and
cross default  provisions set forth in that certain Guaranty,  Cross Default and
Cross Collateralization Agreement of even date herewith (the "Cross Guaranty") ;

         WHEREAS,  the Pledgor will materially  benefit from the consummation of
the transaction described in the Letter Agreement and in furtherance thereof the
Pledgor has  determined  that it is in its best interests and in pursuant of its
business  purposes  that it induce HRP to enter into the GCI Lease by  executing
and delivering this Agreement;

         WHEREAS,  GCI has agreed to guarantee  payment and  performance  of the
obligations of the Pledgor to the Pledgee and to the cross collateralization and
cross default provisions of the Cross Guaranty;

         WHEREAS, in furtherance of the Cross Guaranty and to induce the Pledgee
to enter into the GCI Lease,  the  Pledgor  has agreed to amend and  restate the
Original HRP Shares Pledge  Agreement as provided  herein to further  secure the
obligations of GCI to the Pledgee; and

         WHEREAS, in furtherance of the foregoing, the Pledgor and Advisors have
executed and  delivered an Amended and Restated  Voting Trust  Agreement of even
date herewith (the Original Voting Trust Agreement,  as so amended and restated,
and as the same may be further  amended,  modified or supplemented  from time to
time,.  the  "Voting  Trust  Agreement")  to provide  for the  incorporation  by
reference of the terms and provisions of this Agreement;

<PAGE>
                                      -3-

         NOW,  THEREFORE,  in  consideration of the foregoing and for other good
and valuable consideration,  the receipt,  adequacy and sufficiency of which are
hereby  acknowledged,  the parties  hereto  hereby  agree that the  Original HRP
Shares Pledge Agreement shall be amended and restated as follows:

         1. Defined Terms. (a) Unless otherwise defined herein, for all purposes
of this  Agreement  the terms  defined in this section  shall have the following
meanings:

                  "AMS  Transaction   Documents"  shall  mean  the  "Transaction
         Documents" as such term is defined in the AMS Acquisition Agreement.

                  "Collateral"  shall  mean,  at any  time,  all of the  Pledged
         Shares,  and all proceeds,  income,  profits,  dividends,  interest and
         other  payments or  distributions  now or  hereafter  made upon or with
         respect  thereto,  including  without  limitation,  all  securities and
         properties  that are required to be pledged to the Pledgee  pursuant to
         Sections 6 and 14 hereof.

                  "Default"  means any Event of  Default  and any  condition  or
         event  that with the  giving  of notice or lapse of time or both  would
         become an Event of Default.

                  "Event of Default" shall mean the occurrence of any one of the
         following events:

                           (a) the Pledgor shall fail to make any payment of any
                  amount payable hereunder for more than ten (10) days after the
                  date when due; or

                           (b) any material  representation  or warranty made by
                  the Pledgor herein, or in any document or instrument delivered
                  pursuant hereto,  shall prove to have been false or misleading
                  in any material respect when made; or

                           (c) the Pledgor shall  default in the due  observance
                  or  performance  of any of the terms,  covenants or agreements
                  contained in Sections 4, 5, and 6 hereof; or

                           (d) the Pledgor shall  default in the due  observance
                  or  performance  of any of the terms,  covenants or agreements
                  contained herein to be performed or observed by it relating to
                  other than the payment of money and not otherwise  referred to
                  in this definition,  and such default shall remain  unremedied
                  for ten  (10)  days  after  written  notice  thereof  from the
                  Pledgee;   provided,   however,   that  if  such   default  is
                  susceptible of cure, but such cure cannot be accomplished with
                  due diligence  within such period of time,  and if in addition
                  the Pledgor  commences  to cure such  default  within ten (10)

<PAGE>
                                      -4-

                  days  after  written  notice  thereof  from the  Pledgee,  and
                  thereafter  prosecutes the curing of such default with all due
                  diligence,  such  period  of time  shall be  extended  to such
                  period of time (not to exceed an additional fifty (50) days as
                  may be necessary to cure such default with all due  diligence;
                  or

                           (e) the Pledgor  shall have failed to extend the term
                  of the Voting Trust  Agreement in  accordance  with Section 12
                  thereof  prior to two years before the end of the then term of
                  such Voting Trust Agreement; or

                           (f)  any  Event  of   Default,   as  defined  in  any
                  Transaction Document, shall have occurred.

                  "GCI  Transaction   Documents"  shall  mean  the  "Transaction
         Documents" as such term is defined in the GCI Acquisition Agreement.

                  "Lien" shall mean,  with respect to any asset,  any  mortgage,
         lien, pledge,  charge,  security interest or encumbrance of any kind in
         respect of such asset.

                  "Net  Income"  shall  mean,  for any period  during  which the
         amount  thereof is to be  determined  for a specified  Person,  the net
         income (or net deficit,  if a negative  figure) of such Person for such
         period (taken as a cumulative  whole, if such period shall include more
         than one fiscal  period,  with  deficits  netted  against  net  income)
         determined in accordance with generally accepted accounting  principles
         consistently applied, exclusive of the write-up of any assets.

                  "Obligations"  shall mean the payment and  performance of each
         and every  obligation,  joint or several,  now  existing  or  hereafter
         incurred,   and   whether   contingent,   non-contingent,   liquidated,
         unliquidated,  matured  or  unmatured,  or  otherwise,  of  each of the
         Pledgor and GCI to the Pledgee, under any and all documents, agreements
         and  instruments  by,  between or among any such entity with, to or for
         the benefit of the Pledgee,  whether now existing or hereafter arising,
         and, including,  without limitation, (a) payment and performance of the
         Original  Obligations,  (b) payment and  performance  of each and every
         obligation  and  liability  of the  Pledgor to the  Pledgee  under this
         Agreement, (c) payment and performance of each and every obligation and
         liability of GCI to the Pledgee under the GCI Lease, including, without
         limitation, the payment of Minimum Rent, Additional Rent and Additional
         Charges (as such terms are  defined in the GCI Lease),  (d) payment and
         performance  of each and every  obligation and liability of GranCare in
         respect  of the  Leases  and  under  each and every  other  Transaction
         Document  to  which it is a party  or by  which  it is  bound,  and (d)
         payment  and  performance  of each and every  other  obligation  of the
         Pledgor or GCI to the Pledgee under any Transaction Document.
<PAGE>
                                      -5-

                  "Original  Obligations" shall mean the payment and performance
         of each and every  obligation  and  liability (i) of the Pledgor to the
         Pledgee under this Agreement, (ii) of the Pledgor to the Pledgee, under
         the AMS Note,  the AMS Lease or under any of the other AMS  Transaction
         Documents,  including, without limitation,  payment of the principal of
         the AMS Note,  the  Prepayment Fee (as defined in the AMS Note) and all
         interest (including Minimum Interest and Additional  Interest,  as such
         terms are defined in the AMS Note) under the AMS Note,  and the payment
         of Minimum Rent,  Additional Rent and Additional Charges (as such terms
         are defined in the AMS Lease)  under the Lease,  and (iii) of all other
         obligations of the Pledgor, GCI or GranCare to the Pledgee, whether now
         existing or hereafter arising, whether direct or indirect,  absolute or
         contingent, due or to become due.

                  "Operating  Cash Flow" shall mean, for any period during which
         the amount thereof is to be determined for a specified Person,  the Net
         Income of such Person for such period,  plus, to the extent deducted in
         determining  Net  Income  for  such  fiscal  period,  the  sum  of  (a)
         depreciation and amortization,  (b) all interest on Indebtedness of the
         Pledgor  (including,  for AMS, all amounts payable as Minimum  Interest
         and Additional  Interest under the AMS Note) and all rent payable under
         any leases of real or personal property  (including all amounts payable
         as Minimum Rent and Additional  Rent under the  applicable  Leases) and
         (c) provisions for taxes based upon or measured by income.

                  "Person" shall mean an individual, a corporation, a general or
         limited partnership,  a stock company or association,  a joint venture,
         an  unincorporated  association,  a company,  a trust,  a bank, a trust
         company,  a land trust, a business trust, or any other entity,  and any
         government, agency, or political subdivision thereof.

                  "Pledged Shares" shall mean the One Million (1,000,000) common
         shares of beneficial interest, $.0l par value, of HRP registered in the
         name of the  Pledgor,  and any other  evidence  of  ownership  thereof,
         including,  without  limitation,  any and all Voting Trust Certificates
         issued to the Pledgor under the Voting Trust Agreement and representing
         the beneficial interest in such shares.

                  "Transaction  Documents"  shall  mean,  collectively,  the AMS
         Transaction Documuments.

                  "UCC" shall mean the Uniform  Commercial  Code as from time to
         time in effect in The Commonwealth of Massachusetts;  provided, that if
         by reason of mandatory  provisions of law, the perfection or the effect
         of  perfection  or  nonperfection  of  any  security  interest  created
         hereunder is governed by the Uniform  Commercial Code as in effect in a
         jurisdiction other
<PAGE>
                                      -6-


         than The  Commonwealth of  Massachusetts,  "UCC" shall mean the Uniform
         Commercial Code as in effect in such other jurisdiction for purposes of
         the  provisions  hereof  relating  to  such  perfection  or  effect  of
         perfection or nonperfection.

         (b) References in this Agreement to "herein,"  "hereof" and "hereunder"
shall be deemed to refer to this  Agreement  and  shall  not be  limited  to the
particular  text or  Section  in which such  words  appear.  References  in this
Agreement  to the  Pledgee's  attorneys  shall be  deemed  to  include,  without
limitation,  special  counsel and local counsel for the Pledgee.  The use of any
gender  shall  include all genders and the  singular  number  shall  include the
plural and vice versa as the context may require.

         2.  Voting  Trust  Agreement.   The  Pledgor  and  the  Pledgee  hereby
acknowledge  that the  Pledged  Shares have  heretofore  been  deposited  by the
Pledgor,  in trust,  with Advisors  pursuant to the terms and  conditions of the
Voting Trust Agreement; that the Pledged Shares have been registered in the name
of Advisors,  as Trustee under the Voting Trust  Agreement;  that  Advisors,  as
Trustee,  has issued Voting Trust  Certificates to the Pledgor  representing the
beneficial  interest in the Pledged  Shares;  and that upon the occurrence or an
Event of Default the Pledgee  has the right to deliver to  Advisors,  as Trustee
under the Voting Trust Agreement,  any and all Voting Trust Certificates held by
it in pledge  hereunder  and to receive from  Advisors  stock  certificates  for
shares  held by  Advisors  in an  amount  equal  to the  number  of  shares  the
beneficial  interest in which is  represented  by the Voting Trust  Certificates
surrendered.

         3. Pledge. The Pledgor hereby reaffirms and renews its pledge, grant of
a  security  interest  in,  assignment,   transfer,   delivery,   set  over  and
confirmation unto the Pledgee of all of the Pledgor's right,  title and interest
in and  to the  Collateral,  together  with  the  certificates  representing  or
evidencing  the Pledged  Shares,  with stock powers  attached  duly  endorsed in
blank,  as  security  for the full and prompt  payment  and  performance  of the
Obligations.

         4. Representations and Warranties.  The Pledgor represents and warrants
(a)  that  there  are no  contractual  restrictions  upon  the  transfer  of the
Collateral  and that the Pledgor has good and valid title to the Pledged  Shares
owned by such Pledgor free and clear of any Liens;  (b) that this  Agreement and
the delivery of the Pledged Shares to the Pledgee  creates a valid and perfected
security  interest in the Collateral,  subject to no prior Lien; and (c) that no
consents or  approvals  of, or filings  with any  governmental  body,  agency or
official  are  required for the  validity or  enforceability  of this  Agreement
(except as may be required in connection  with any disposition of the Collateral
by the Pledgee under laws affecting the offer and sale of securities  generally)
or for the perfection of the security  interests created under this Agreement in
the Collateral.
<PAGE>
                                      -7-

         5.  Covenants.  The Pledgor  covenants  and agrees that the Pledgor (i)
shall not,  other than as  contemplated  under the Amended and  Restated  Voting
Trust Agreement,  sell,  assign,  exchange,  or otherwise  transfer or grant any
option with respect to any of the Pledgor's rights to the Collateral, (ii) shall
not create or suffer to exist any Lien against, in or with respect to any of the
Collateral  and the security  interest  thereon  conveyed to the Pledgee by this
Agreement, and shall defend the Pledgee's interest in the collateral against the
claims of all Persons and (iii) shall not either knowingly or negligently  (with
or without  knowledge)  take any action  which would in any manner  impair.  the
value of the Collateral.

         6. Stock  Dividends;  Reorqanizations.  In the event of any one or more
reclassifications,  changes,  exchanges  stock splits,  stock  dividends,  stock
consolidations, or other subdivisions or combinations of the shares of any class
of HRP's capital stock or of any immediate or remote  successor to substantially
all of  HRP's  business  or  assets  pursuant  to any one or more of the  events
described in this sentence,  or the  consolidation  of HRP or any such successor
with, or merger of HRP or any such successor into, other corporations,  or other
recapitalizations or reorganizations affecting HRP or any such successor, or any
one or more sales or  conveyances  to another  corporation  of HRP's or any such
successor's  property  as  an  entirety  or  substantially  as  an  entirety  (a
"Reorqanization"),   the  Pledgor  shall  pledge  as  collateral  hereunder  all
securities  and  property  which  come to the  Pledgor  as a result  of that and
subsequent  Reorganizations,  except for securities and property  surrendered or
canceled  pursuant to any of same, along with appropriate  stock transfer powers
duly endorsed in blank, and all other instruments the Pledgee may deem necessary
or  desirable  to vest or  confirm  title  to  same or  facilitate  foreclosure,
assignment,  sale or other transfer thereof.  Such securities and property shall
stand  pledged  and  assigned in the same manner as the  property  described  in
Section 2 hereof and the term  "Collateral"  shall include such  securities  and
property.

         7. Voting Power, Dividends, Etc. The Pledgor agrees that for so long as
this  Agreement  remains  in  effect  (i) the  Pledgee  may,  at any time in its
discretion,  register  the Pledged  Shares in its own name or in the name of its
nominee;  (ii) the  Pledgee  or its  nominee  shall  have the  right to vote and
exercise  all  consensual  and  other  powers  of  ownership  pertaining  to the
Collateral in such manner as the Pledgee in its sole and absolute discretion may
deem  necessary,  appropriate  or advisable,  and, if the Pledgee so requests in
writing,  the  Pledgor  shall  execute and deliver to the Pledgee or its nominee
such additional  authorizations,  proxies, dividends and such other documents as
the Pledgee may  reasonably  request to secure to the Pledgee or its nominee the
rights,  powers and  authorities  intended to be conferred  upon Pledgee or such
nominee by this Section;  and (iii) all dividends and other distributions on the
Collateral  shall be paid  directly  to the  Pledgee or its nominee and shall be
applied

<PAGE>
                                      -8-

by the Pledgee, or such nominee following receipt thereof, to the payment of the
Obligations in such order as the Pledgee may, in its discretion, select.

         8. Sale of Collateral After an Event of Default. Upon the occurrence of
any Event of Default,  then, at the Pledgee's option,  the Pledgee may apply the
cash, if any, then held by it as collateral  hereunder,  for the purposes and in
the manner  provided  in Section 9 hereof,  or if there shall be no such cash or
the cash so applied shall be insufficient to make in full all payments  provided
in subsections (a) and (b) of Section 9 hereof,  the Pledgee may, in addition to
any rights and remedies the Pledgee may otherwise  have as a secured party under
the UCC or  otherwise,  and  without  further  demand,  advertisement  or notice
(except as expressly  provided for in subsection  (a) of this Section 8), and in
any manner necessary to comply with the applicable  requirements of the Internal
Revenue Code concerning real estate investment trusts:

                  (a) elect to sell the Collateral,  or any part thereof, in one
         or more sales,  at public or private sale,  conducted by any officer or
         agent of, or auctioneer or attorney for, the Pledgee,  at the Pledgee's
         place of  business  or  elsewhere,  for cash or on credit,  and at such
         reasonable  price or prices as the  Pledgee  shall  determine,  and the
         Pledgee may be the  purchaser of any or all of the  Collateral so sold.
         The  Pledgee  may,  in its  reasonable  discretion,  at any  such  sale
         restrict the  prospective  bidders or  purchasers  as to their  number,
         nature  of  business  and  investment  intention,   including,  without
         limitation,  a  requirement  that the  Persons  making  such  purchases
         represent  and agree to the  satisfaction  of the Pledgee that they are
         purchasing the Collateral for their account,  for  investment,  and not
         with a view to the distribution or resale of any thereof. Upon any such
         sale the Pledgee  shall have the right to deliver,  assign and transfer
         the  Collateral  so  sold  directly  to  the  purchaser  thereof.  Each
         purchaser  (including  the  Pledgee)  at any such sale  shall  hold the
         Collateral so sold, absolutely free from any claim or right of whatever
         kind, including, without limitation, any equity or right of redemption,
         of the Pledgor,  which the Pledgor hereby  specifically  waives, to the
         extent the  Pledgor may  lawfully do so, and all rights of  redemption,
         stay or  appraisal  which the Pledgor has or may have under any rule of
         law or statute now existing or  hereafter  adopted.  The Pledgee  shall
         give the Pledgor at least ten (10) days'  written  notice  (which shall
         constitute  reasonable  notice) of any public or private sale and shall
         state the time and place  fixed for such  sale.  Any such  public  sale
         shall be held at such time or times within  ordinary  business hours as
         the Pledgee  shall fix in the notice of such sale. At any such sale the
         Collateral  may-be sold in one lot as an entirety or in separate  lots.
         The Pledgee  shall not be  obligated  to make any sale  pursuant to any
         such notice. The Pledgee, without notice or publication,
<PAGE>
                                      -9-

         may  adjourn  any  public  or  private   sale  from  time  to  time  by
         announcement  at the  time  and  place  fixed  for  such  sale,  or any
         adjournment thereof, and any such sale may be made at any time or place
         to  which  the same  may be so  adjourned  without  further  notice  or
         publication.  In case of any sale of all or any part of the  Collateral
         on credit,  the Collateral so sold may be retained by the Pledgee until
         the selling  price is paid by the  purchaser  thereof,  but the Pledgee
         shall not incur any liability in case of the failure of such  purchaser
         to take up and pay for the  Collateral so sold, and in case of any such
         failure,  such  Collateral  may again be sold under and pursuant to the
         provisions hereof; or

                  (b)  proceed  by a  suit  or  suits  at law  or in  equity  to
         foreclose  upon the pledge  created  under this  Agreement and sell the
         Collateral,  or any  portion  thereof,  under a judgment or decree of a
         court or courts of competent jurisdiction.

         The Pledgee,  as attorney in fact pursuant to Section 11 hereof may, in
the name and stead of the Pledgor, make and execute all conveyances, assignments
and transfers of the  Collateral  sold pursuant to subsection (a) or (b) of this
Section 8. If so requested by the Pledgee,  the Pledgor shall ratify and confirm
any  sale or  sales  by  executing  and  delivering  to the  Pledgee  or to such
purchaser or  purchasers,  all such  instruments  as may, in the judgment of the
Pledgee, be reasonably necessary or appropriate for such purpose.

         The receipt of the Pledgee for the purchase money paid at any such sale
made by it shall be a  sufficient  discharge  therefor to any  purchaser  of the
Collateral, or any portion thereof, sold as aforesaid; and no such purchaser (or
his or its  representatives  or assigns),  after paying such purchase  money and
receiving  such  receipt,  shall  be  bound  to see to the  application  of such
purchase money or any part thereof or in any manner whatsoever be answerable for
any loss,  misapplication  or  nonapplication of any such purchase money, or any
part  thereof,  or be  bound  to  inquire  as to the  authorization,  necessity,
expediency or regularity of any such sale.

         9. Application of Proceeds. The proceeds of any sale, or of collection,
of all or any part of the  Collateral  shall be applied by the Pledgee,  without
any marshaling of assets,  towards  payment of the items  immediately  set forth
below in the following order:

                  (a) all costs and  expenses of such sale,  including,  without
         limitation,  reason able compe  nsation to the Pledge e and its agents,
         attorne ys and counse l, and all other reason able expens es, liabiliti
         es and  advanc  es made or  incurre d by the  Pledge e in  connec  tion
         therewi th; and

                  (b) the  Obligations  (in  such  order  as the  Pledgee  shall
         determine);  after which,  any surplus from such proceeds shall

<PAGE>

         be paid to the  Pledgor or to  whomever  may be  lawfully  entitled  to
         receive the same or as a court of competent jurisdiction may direct.

         10.  Obligations  with Respect to  Collateral.  Except as  specifically
provided herein in the Amended and Restated Voting Trust Agreement,  the Pledgee
shall have no duty as to the  collection or protection of the  Collateral or any
income  thereon,  nor as to the  preservation of any rights  pertaining  thereto
beyond the safe  custody  thereof.  The  Pledgee  may  exercise  its rights with
respect to the  Collateral  without  resorting  or regard to other  security  or
sources of reimbursement.

         11. The Pledgee Appointed Attorney in Fact;  Indemnity.  The Pledgee is
hereby appointed the attorney-in-fact,  with full power of substitution,  of the
Pledgor for the purpose of carrying out the provisions of this  Agreement  (incl
the  provisions  of Section 8 hereof)  and taking any action and  executing  any
instruments  which such  attorney-in-fact  may deem  necessary  or  advisable to
accomplish the purposes  hereof.  This power of attorney,  being coupled with an
interest, shall be irrevocable until all of the Obligations have been fully paid
and performed.  The power of attorney  conferred on the Pledgee  pursuant to the
provisions of this Section 11 is provided solely to protect the interests of the
Pledgee and shall not impose any duty on the Pledgee to exercise any such power,
and neither the Pledgee nor such  attorney-in-fact  shall be liable for any act,
omission,  error in  judgment  or mistake of law,  except as the same may result
from its gross  negligence or willful  misconduct.  The Pledgor shall and hereby
agrees to indemnify and save harmless  Pledgee for, from and against any and all
liability  or  damage  which it may  incur,  in good  faith  and  without  gross
negligence or willful misconduct,  in the exercise and performance of any of the
Pledgee's powers and duties specifically set forth herein.

         12. No Waiver;  Cumulative  Remedies.  The Pledgee shall not by any act
(except t)y a written  instrument in accordance with Section 16 hereof),  delay,
indulgence,  omission or  otherwise be deemed to have waived any right or remedy
hereunder  or to have  acquiesced  in any  Default or Event of Default or in any
breach of any of the terms and conditions  hereof.  No failure to exercise,  nor
any  delay  in  exercising,  on the part of the  Pledgee,  any  right,  power or
privilege  hereunder  shall  operate as a waiver  thereof.  No single or partial
exercise of any right, power or privilege  hereunder shall preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.
A waiver by the  Pledgee of any right or remedy  hereunder  on any one  occasion
shall not be construed  as a bar to any right or remedy which the Pledgee  would
otherwise have on any future  occasion.  The rights and remedies herein provided
are cumulative, may be exercised singly or concurrently and are not exclusive of
any rights or remedies provided by law.
<PAGE>
                                      -11-

         13.  Termination  of Pledge.  This Agreement and the pledge made hereby
shall remain in effect until all of the Obligations have been paid and satisfied
in full,  and all terms and  conditions of the  Transaction  Documents have been
satisfied  in full and shall have  expired by their  terms.  The  Pledgee  shall
thereupon  assign,  transfer and deliver to the Pledgor without  representation,
warranty or recourse,  against appropriate receipts, all the Collateral, if any,
then held by it in pledge hereunder.

         14.      Partial Release; Re-pledge.

         (a)  Subject to the  provisions  of  paragraph  (b) below,  the Pledgee
agrees to release to the Pledgor fifty percent (50%) of the Pledged  Shares from
the lien created by this  Agreement at the written  request (and at the expense)
of the  Pledgor,  without  recourse,  representation  or  warranty  of any kind,
following the occurrence of the Release Date (as hereinafter defined).  The term
"Release  Date"  shall  mean the date on which all of the  following  conditions
exist:

                  (1)  for  the  most  recently  completed  fiscal  year  of the
         Pledgor, the Operating Cash Flow of the Pledgor shall have been greater
         than Two  Hundred  Percent  (200%)  of the sum of (a) all rent  payable
         under the AMS Lease  (including  amounts  payable as  Minimum  Rent and
         Additional  Rent  thereunder)  during  such  fiscal  year  and  (b) all
         payments  of  principal  and  interest  under  the AMS Note  (including
         amounts payable as Minimum Interest and Additional Interest thereunder)
         during such  fiscal  year,  as shown in the  financial  statements  and
         accompanying  certificates of AMS required to be delivered  pursuant to
         the AMS Acquisition Agreement;

                  (2) for the most  recently  completed  fiscal year of GCI, GCI
         shall have  achieved  a ratio of  Operating  Cash Flow to rent  payable
         under the GCI Lease  (including  amounts  payable as  Minimum  Rent and
         Additional  Rent  thereunder)  of 2 to 1, as shown in the  Consolidated
         Financials  and  accompanying   certificates  of  GCI  required  to  be
         delivered pursuant to Section 18.2(b) of the GCI Lease;

                  (3) no Default or Event of Default  shall have occurred and be
         continuing;

                  (4) the Pledgee shall have received a certificate  signed by a
         Responsible  Officer  of the  Pledgor  certifying  that the  conditions
         described in clauses (91) and (3) above have been met; and

                  (5) the Pledgee shall have received a certificate  signed by a
         Responsible Officer of GCI certifying that the conditions  described in
         clauses (2) and (3) above have been met.
<PAGE>
                                      -12-

         Any  Pledged  Shares  released  as  provided  above shall be subject to
re-pledging upon the terms set forth in paragraph (b) below.

         (b) If at any time subsequent to the Release Date,

                  (i) the  Operating  Cash Flow of the  Pledgor  for any  fiscal
         quarter of the Pledgor ending after the Release Date shall be less than
         One Hundred  Fifty  percent  (150%) of the sum of (a) all rent  payable
         under the AMS Lease  (including  amounts  payable as  Minimum  Rent and
         Additional Rent thereunder but excluding  amounts payable as Additional
         Charges  thereunder) during such fiscal quarter and (b) all payments of
         principal and interest under the AMS Note (including amounts payable as
         Minimum Interest and Additional Interest thereunder) during such fiscal
         quarter;

                  (ii) the  Operating  Cash Flow of the  Pledgor  for any fiscal
         year of the Pledgor  ending  after the Release  Date shall be less than
         Two Hundred percent (200%) of the sum of (a) all rent payable under the
         AMS Lease  (including  amounts  payable as Minimum Rent and  Additional
         Rent  thereunder but excluding  amounts  payable as Additional  Charges
         thereunder)  during such fiscal year and (b) all  payments of principal
         and interest under the AMS Note  (including  amounts payable as Minimum
         Interest and  Additional  Interest  thereunder  but  excluding  amounts
         payable as Additional Charges thereunder) during such fiscal year;

                  (iii) the Operating Cash Flow of GCI for any fiscal quarter of
         GCI ending after the Release Date shall be less than One Hundred  Fifty
         percent  (150%) of all rent  payable  under  the GCI  Lease  (including
         amounts  payable as Minimum Rent and  Additional  Rent  thereunder  but
         excluding amounts payable as Additional Charges thereunder) during such
         fiscal quarter; or

                  (iv) the Operating Cash Flow of GCI for any fiscal year of GCI
         ending  after the Release  Date shall be less than Two Hundred  percent
         (200%)  of all rent  payable  under the GCI  Lease  (including  amounts
         payable as Minimum Rent and  Additional  Rent  thereunder but excluding
         amounts payable as Additional  Charges  thereunder)  during such fiscal
         year;

         in each case as  reflected  in the  audited  financial  statements  and
         accompanying  certificates  of AMS or GCI, as the case may be, required
         to be delivered pursuant to the applicable Transaction Documents,

the Pledgor (or, if the released  Pledged Shares shall have been  transferred in
accordance  with paragraph (b) hereof,  the then , owner of such Pledged Shares)
shall,  within ten (10)  business  days  following  the request of the  Pledgee,
either (x) pledge to the Pledgee, as collateral hereunder, free and clear of all
Liens of

<PAGE>
                                      -13-

any kind, the Pledged Shares that were released pursuant to paragraph (b) above,
along with  appropriate  stock  transfer  powers duly  endorsed in blank and all
other  instruments  the Pledgee may deem  necessary  or  desirable to effect and
perfect such pledge  (which  Pledged  Shares shall stand pledged and assigned in
the same  manner as the  property  described  in  Section 2 hereof and the terms
"Collateral"  and "Pledged  Shares" it shall include such Pledged Shares) or (y)
pay-5-,000,000 to the Pledgee to be held by it as collateral for the Obligations
pursuant to the terms of a cash collateral agreement executed by the Pledgor (or
such then owner of the Pledged  Shares) in form and substance  acceptable to the
Pledgee.

         14. Further Assurances. At any time and from time to time, upon request
by the Pledgee,  the Pledgor shall promptly make, execute and deliver,  or cause
to be made, executed and delivered, to the Pledgee and, where appropriate, cause
to be recorded  and/or filed (and from time to time  thereafter to be rerecorded
and/or  refiled) at such time and in such  offices and places as shall be deemed
necessary or desirable by the Pledgee, in its discretion, any and all such other
and  further   amendments,   assignments,   instruments  of  further  assurance,
certificates  and other  documents as the Pledgee may, in its  discretion,  deem
necessary or  desirable to (i) enable the Pledgee to negotiate  the AMS Note and
to assign  the AMS  Lease,  the GCI Lease or the  other  Transaction  Documents,
and/or (ii) effectuate,  complete,  or perfect,  or to continue and preserve the
obligations of the Pledgor under this Agreement.

         15. Notices,  Etc. Any notice,  request,  demand,  statement or consent
desired or  required  to be given  hereunder  shall be in  writing  and shall be
delivered by hand, sent by certified mail, return receipt  requested,  sent by a
nationally  recognized commercial overnight delivery service with provisions for
a  receipt,   postage  or  delivery  charges  prepaid,   or  sent  by  facsimile
transmission,  and  shall be  deemed  given  (a)  when  actually  delivered,  if
delivered by hand,  (b) upon receipt,  if sent by certified  mail,  (c) the next
Business  Day after being  placed in the  possession  of an  overnight  delivery
service,  if sent by an overnight  delivery  service or (d) if sent by facsimile
transmission,  when electronic  indication of receipt is received,  and shall be
addressed as follows:

If to the Pledgor:        AMS Properties, Inc.
                          300 Corporate Pointe
                          Suite 300
                          Culver City, CA 90230
                          Attn:    General Counsel

With a copy to:           Andrews & Kurth, L.L.P.
                          4200 Texas Commerce Tower
                          Houston, TX 77002
                          Attn: John E. Nash, Esq.
<PAGE>
                                      -14-


If to the Pledgee:        Health and Rehabilitation Properties Trust
                          400 Centre Street
                          Newton, Massachusetts 02158
                          Attn: President


In each case
   with copies to:        Sullivan & Worcester
                          One Post Office Square
                          Boston, Massachusetts 02109
                          Attn: Lena G. Goldberg, Esq.

or at such  other  place as any party  hereto  may from  time to time  hereafter
designate  to the other in writing.  Any notice  given to the  Pledgor  from the
Pledgee shall not imply that such notice or any further or similar notice was or
is required.

         16.  Amendments  and  Modifications.   This  Agreement  and  the  other
Transaction Documents set forth the entire agreement of the parties with respect
to the  subject  matter  hereof  and may not be  amended,  modified,  revised or
terminated  except by an agreement in writing  signed by the party  against whom
enforcement  is sought.  The  provisions of this  Agreement  shall extend and be
applicable to all renewals, replacements, amendments, extensions, substitutions,
revisions,  consolidations and modifications of the Transaction  Documents,  and
any and all  references  herein to any  Transaction  Document shall be deemed to
include any such renewals, replacements,  amendments, substitutions,  revisions,
extensions, consolidations or modifications thereof.

         17.  Invalidity.  If any provision of this Agreement or the application
thereof to any Person or circumstance,  for any reason and to any extent,  shall
be held to be invalid or unenforceable,  neither the remainder of this Agreement
nor the application of such provision to any other Person or circumstance  shall
be  affected  thereby,  but rather the same shall be  enforced  to the  greatest
extent permitted by law.

         18.  Successors and Assigns.  The provisions of this Agreement shall be
binding on the  Pledgor and its  respective  heirs,  executors,  administrators,
legal representatives,  successors and assigns and this Agreement and all of the
covenants  herein  contained  shall  inure to the benefit of the Pledgee and the
Pledgee's successors and assigns.

         19. Captions and Headings.  The captions and headings set forth in this
Agreement  are  included  for  convenience  and  reference  only  and the  words
contained therein shall in no way be held or deemed to define, limit,  describe,
explain,  modify,  amplify  and/or add to the  interpretation,  construction  or
meaning of, or the scope or intent of, this Agreement or any part hereof.

         20.  NONLIABILITY OF TRUSTEES.  THE  DECLARATION OF TRUST  ESTABLISHING
PLEDGEE,  DATED OCTOBER 9, 1986, A COPY OF WHICH,  TOGETHER WITH ALL  AMENDMENTS
THERETO (THE  "DECLARATION"),  IS DULY
<PAGE>
                                      -15-

FILED WITH THE DEPARTMENT OF ASSESSMENTS  AND TAXATION OF THE STATE OF MARYLAND,
PROVIDES THAT THE NAME "HEALTH AND  REHABILITATION  PROPERTIES  TRUST" REFERS TO
THE  TRUSTEES  UNDER  THE  DECLARATION   COLLECTIVELY   AS  TRUSTEES,   BUT  NOT
INDIVIDUALLY OR PERSONALLY, AND THAT NO TRUSTEE, OFFICER, SHAREHOLDER,  EMPLOYEE
OR  AGENT  OF  PLEDGEE  SHALL  BE HELD TO ANY  PERSONAL  LIABILITY,  JOINTLY  OR
SEVERALLY, FOR ANY OBLIGATION OF, OR CLAIM AGAINST, PLEDGEE. ALL PERSONS DEALING
WITH  PLEDGEE,  IN ANY WAY,  SHALL LOOK ONLY TO THE  ASSETS OF  PLEDGEE  FOR THE
PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.

21.  GOVERNING LAW. EXCEPT AS TO MATTERS  REGARDING THE INTERNAL  AFFAIRS OF HRP
AND ISSUES OF OR LIMITATIONS ON ANY PERSONAL  LIABILITY OF THE  SHAREHOLDERS AND
TRUSTEES  OF HRP FOR  OBLIGATIONS  OF HRP,  AS TO WHICH THE LAWS OF THE STATE OF
MARYLAND  SHALL GOVERN,  THIS AGREEMENT AND ANY OTHER  INSTRUMENTS  EXECUTED AND
DELIVERED TO EVIDENCE, COMPLETE, OR PERFECT THE TRANSACTIONS CONTEMPLATED HEREBY
WILL BE INTERPRETED, CONSTRUED, APPLIED AND ENFORCED IN ACCORDANCE WITH THE LAWS
(OTHER  THAN THE LAWS  GOVERNING  CONFLICTS  OF  LAWS)  OF THE  COMMONWEALTH  OF
MASSACHUSETTS.



                           [Intentionally left blank.]



<PAGE>

                                      -16-

         IN WITNESS  WHEREOF,  the parties  hereto have executed this  Agreement
under seal on the day and year first above written.

WITNESS:                      Pledgor:  AMS PROPERTIES, INC.,
                                        a Delaware corporation


/s/                           By: /s/ Kevin W. Pendergest
Name                              Name:  Kevin W. Pendergest
                                  Title:  Executive Vice President


WITNESS:                      Pledgee: HEALTH AND REHABILITATION
                                       PROPERTIES TRUST,
                                       a Maryland real estate
                                       investment trust


/s/                           By: /s/ David Hegarty
Name                              Name:  David Hegarty
                                  Title:  Treasurer







Signature  page to Amended and Restated HRP Shares Pledge  Agreement  date as of
June 30, 1992.


                                                                   EXHIBIT 10.27

                   AMENDED AND RESTATED VOTING TRUST AGREEMENT


         This AMENDED AND RESTATED VOTING TRUST AGREEMENT is made as of
June 30, 1992 by and between AMS Properties,  Inc., a Delaware  corporation (the
"Beneficiary") and HRPT Advisors, Inc., a Delaware corporation ("Advisors"),  as
trustee (in such capacity, together with any successor trustee, the "Trustee").

                                WITNESSETH THAT:

         WHEREAS,  pursuant to an Acquisition Agreement,  Agreement to Lease and
Mortgage  Loan  Agreement  dated  as of  December  28,  1990 (as the same may be
amended,  modified  or  supplemented  from  time to time,  the "AMS  Acquisition
Agreement")  among American Medical  Services,  Inc.  ("AMS"),  AMS Holding Co.,
GranCare,  Inc.  (f/k/a  HostMasters,  Inc.)  ("GranCare"),  the Beneficiary and
Health and  Rehabilitation  Properties  Trust, a Maryland real estate investment
trust (the  "Company"),  the Company made a loan to the  Beneficiary  the sum of
Fifteen  Million Dollars  ($15,000,000)  which loan is evidenced by a promissory
note dated as of  December  28,  1990 (as the same may be  amended,  modified or
supplemented  from time to time, the "Note") made by the Beneficiary and payable
to the order of the Company;

         WHEREAS,  pursuant  to  the  AMS  Acquisition  Agreement,  the  Company
acquired  from  AMS  certain  property  more   particularly   described  therein
(hereinafter,  the "AMS Leased  Properties")  and,  pursuant  to a master  lease
agreement  dated as of December  28, 1990 by and  between  the  Beneficiary,  as
tenant, and the Company,  as landlord,  and the facility leases thereunder (such
master  lease  agreement  and  facility  leases,  as the  same  may be  amended,
modified, or supplemented from time to time, collectively, the "AMS Lease"), the
Company leased the AMS Leased Properties back to the Beneficiary;

         WHEREAS,  in  connection  with  the  execution  of the AMS  Acquisition
Agreement,  the  Beneficiary  pledged One Million  (1,000,000)  common shares of
beneficial  interest,  $.01 par value, of the Company (the  "Deposited  Shares")
registered in the name of the Beneficiary with Advisors in trust pursuant to the
terms and conditions of that certain Voting Trust Agreement dated as of December
28, 1990,  (the "Original  Voting Trust  Agreement") to the Company  pursuant to
that  certain HRP Shares  Pledge  Agreement  dated as of December  28, 1990 (the
"Original HRP Shares Pledge  Agreement");  and the  Beneficiary  further agreed,
pursuant to the terms and conditions of the Original Voting Trust Agreement,  to
deposit with the Trustee in trust certain additional shares of, capital stock of
the Company ("Capital  Stock"),  or securities  convertible into or exchangeable
for  capital  stock of HRP,  acquired  by it after the date  thereof as provided
therein;
<PAGE>
                                      -2-

         WHEREAS,  pursuant to a letter agreement dated April 10, 1992,  between
GranCare and the  Company,  the Company  agreed to enter into a long-term  lease
with GCI Health Care Centers,  Inc. ("GCI"),  a Delaware  corporation and wholly
owned  subsidiary of GranCare,  with respect to certain real  property,  and the
related improvements and personal property,  located in Arizona,  California and
South Dakota and more particularly  described therein pursuant to leases of even
date herewith,  each of which  incorporates by reference a master lease document
of even date herewith by and between the Company, as landlord and GCI, as tenant
(as such leases may be amended,  modified or supplemented from time to time, the
"GCI Lease", and together with the AMS Lease, the "Leases");

         WHEREAS,  the Company  has agreed to enter into the GCI Lease  provided
that the  Beneficiary,  which  company is under common  control with GCI and has
heretofore  entered  into  sale-leaseback,  mortgage  financing  and/or  leasing
transactions  with the Company,  agrees to guarantee  payment and performance of
GCI's  obligations  to the Company and to certain  cross  collateralization  and
cross default  provisions set forth in that certain Guaranty,  Cross Default and
Cross Collateralization Agreement of even date herewith (the "Cross Guaranty");

         WHEREAS,  GCI has agreed to guarantee  payment and  performance  of the
obligations of the Beneficiary to the Company and to the cross collateralization
and cross default provisions of the Cross Guaranty;

         WHEREAS, in furtherance of the Cross Guaranty and to induce the Company
to enter into the GCI Lease,  the Company and the Beneficiary  have executed and
delivered  an Amended and  Restated HRP Shares  Pledge  Agreement,  of even date
herewith (the "Amended and Restated Shares Pledge Agreement"),  which amends and
restates  the  Original  Shares  Pledge  Agreement  so as  to  provide  for  the
Beneficiary's  further  pledge unto the  Company of all of its right,  title and
interest  in and to the  Collateral  (as defined  therein)  as security  for the
Obligations (as defined therein);

         WHEREAS,  the Beneficiary agrees that Advisors shall continue to be the
Trustee  hereunder  and agrees to  continue  to empower  the Trustee to vote the
Deposited  Shares and any additional  shares of Capital Stock deposited with, or
held by, the Trustee hereunder; and

         WHEREAS,  the  Trustee  has  consented  to  continue  to act under this
Agreement for the purposes herein provided.

         NOW, THEREFORE, in consideration of the foregoing and of the covenants,
premises and agreements herein contained, and in consideration of the deposit in
trust,  with the  Trustee,  of the  Deposited  Shares,  and such other shares of
Capital Stock as may, from time to time, to be deposited hereunder,  the parties
hereto
<PAGE>
                                      -3-

hereby  agree that the  Original  Voting  Trust  Agreement  shall be amended and
restated in full as follows:

         1. Defined Terms.  Unless otherwise  defined herein,  capitalized terms
used in this  Agreement  without  definition  shall have the  meaning  specified
therefor in the Amended and Restated Shares Pledge Agreement.

         2. The Trustee. The Trustee shall be Advisors which, for and during the
term and any continuance of this  Agreement,  shall be Trustee in respect of all
Deposited Shares and additional shares of Capital Stock of the Company deposited
pursuant to the provisions hereof with all the powers, rights and privileges and
subject to all the conditions and covenants hereinafter set forth.

         In the event  that  Advisors  or any  successor  Trustee  shall  become
unwilling  or unable to serve as Trustee,  it may appoint in writing a successor
Trustee,  who shall accept this trust upon the same terms as provided by Section
17 hereof by filing  its  written  acceptance  in the  executive  offices of the
Company.

         3.  Voting  Trust  Agreement.  A copy of this  Agreement  and of  every
amendment or supplement  hereto shall be filed in the  executive  offices of the
Company located in The Commonwealth of  Massachusetts,  and shall be open to the
inspection of the Beneficiary  during normal  business  hours.  All Voting Trust
Certificates issued as hereinafter  provided shall be issued,  received and held
subject to all the terms of this Agreement.

         4. Transfer of Stock to Trustee.  (a) The  Beneficiary  has  previously
assigned and transferred to the Trustee the Deposited Shares subject to and upon
the terms and conditions of this Agreement. The Beneficiary hereby reaffirms its
delivery to the Trustee of stock certificates representing the Deposited Shares,
together with stock powers attached endorsed in blank.

         (b) In the event  the  Beneficiary  shall,  at any time or from time to
time, after having become a party to this Agreement,  become the owner or holder
of any  additional  shares  of  Capital  Stock  by  virtue  of any  one or  more
reclassifications,  changes,  exchanges,  stock splits,  stock dividends,  stock
consolidations, or other subdivisions or combinations of the shares of any class
of the  Company's  Capital  Stock or of any  immediate  or remote  successor  to
substantially  all of the  Company's  business or assets  pursuant to any one or
more of the events  described  in this  sentence,  or the  consolidation  of the
Company  or any such  successor  with,  or  merger  of the  Company  or any such
successor   into,   other   corporations,    or   other   recapitalizations   or
reorganizations  affecting the Company or any such successor, or any one or more
sales  or  conveyances  to  another  corporation  of the  Company's  or any such
successor's  property  as an  entirety  or  substantially  as an  entirety,  the
Beneficiary  shall,  within a reasonable  period of time (not to exceed ten (10)
days) after such event,  assign and  transfer  to the  Trustee  such  additional
shares
<PAGE>
                                      -4-

of Capital Stock and deliver to the Trustee stock certificates representing such
shares of Capital  Stock,  together with stock powers  attached duly endorsed in
blank.

         (c) All of the Deposited  Shares,  and all additional shares of Capital
Stock deposited hereunder,  and all payments made to or property received by the
Trustee as owner of such  Capital  Stock,  shall be  received  by the Trustee in
trust and be held and/or deposited or otherwise disposed of by the Trustee under
and pursuant to the terms and conditions hereof.

         5. Voting  Trust  Certificates.  (a) Upon the receipt of the  Deposited
Shares from the Beneficiary, the Trustee issued and delivered to the Beneficiary
a certificate representing the beneficial interest in such Deposited Shares (the
"Original  Certificate")  which was registered in the name of the Beneficiary on
the So-oks of the Trustee.  Upon the execution  and delivery of this  Agreement,
the Beneficiary shall surrender such Original Certificate to the Trustee and the
Trustee  shall cancel such Original  Certificate  and shall issue and deliver to
the Beneficiary a new certificate  representing the beneficial  interest in such
Deposited Shares (a "Voting Trust Certificate") which shall be registered in the
name of the Beneficiary on the books of the Trustee. Until and unless changed by
the Trustee,  each Voting Trust  Certificate  issued hereunder in respect of the
Deposited  Shares or any  Capital  Stock shall be  substantially  in the form of
Exhibit A hereto.  No Voting Trust  Certificate  shall be valid unless and until
signed by the Trustee in office at the date of issue.  The  Trustee  may, at any
time and from  time to time,  make  such  changes  in the form of  Voting  Trust
Certificate as it shall deem necessary or advisable.

         (b) The  Beneficiary  and the Trustee  acknowledge  that  Voting  Trust
Certificates  issued  hereunder are subject to the provisions of the Amended and
Restated Shares Pledge Agreement,  and that such Voting Trust Certificates shall
be considered  the  equivalent of Pledged Shares for purposes of the Amended and
Restated  Shares  Pledge  Agreement  and shall be  subject  to all the terms and
conditions of the Amended and Restated Shares Pledge Agreement. To that end, the
Beneficiary  hereby  agrees to pledge,  grant a security  interest  in,  assign,
transfer,  set over and confirm unto the Company all of the Beneficiary's right,
title and interest in and to such Voting Trust Certificates, and to deliver such
Voting Trust Certificates  (together with stock powers attached duly endorsed in
blank) as  security  for the full and  prompt  payment  and  performance  of the
Obligations.

         6. Issuance of Stock  Certificates to Trustee.  The shares of Deposited
Shares and all additional shares of Capital Stock deposited with and held by the
Trustee  hereunder  shall  be  registered  in the  name of the  Trustee  and any
certificates  for  Deposited  Shares  or  additional  shares  of  Capital  Stock
transferred  to  the  Trustee  shall  be  surrendered   and  cancelled  and  new
certificates  therefor  shall  be  issued  in  the  name  of  the  Trustee.

<PAGE>
                                      -5-
All  certificates  issued to the Trustee shall state that the  certificates  are
issued pursuant to this  Agreement.  The stock record books of the Company shall
also  note the fact  that the  shares  recorded  under  the name of the  Trustee
hereunder are subject to this Agreement.

         7. Dividends and Other Distributions.  Cash dividends, if any, declared
by the Company on or in respect or the Deposited Shares or any additional shares
of Capital Stock  deposited  with, or held by, the Trustee under this Agreement,
shall be paid over by the  Trustee to the  Company and applied by the Company to
the payment of the  Obligations  in such order as the  Company  may, in its sole
discretion, determine. If any dividend in respect of the Deposited Shares or any
additional shares of Capital Stock deposited hereunder with the Trustee is paid,
in whole or in part,  in Capital  Stock of the Company,  or in other  securities
convertible into or exchangeable  for capital stock of the Company,  the Trustee
shall likewise hold,  subject to the terms of this Agreement,  the  certificates
for  Capital  Stock or such  securities  which  are  issued on  account  of such
dividend and the holder of each Voting Trust  Certificate  representing  Capital
Stock or such  securities on which such dividend has been paid shall be entitled
to  receive a Voting  Trust  Certificate  for the  number of shares and class of
capital stock or securities received as such dividend with respect to the shares
represented by such Voting Trust  Certificate.  Any such additional Voting Trust
Certificates  issued  pursuant to this Section 7 shall be deemed  pledged to the
Company pursuant to Section 5(b) hereof.

         8.  Dissolution of the Company.  This Agreement,  and the Trust created
hereby,  shall terminate  within thirty (30) days of the dissolution or total or
partial liquidation of the Company,  whether voluntary or involuntary,  pursuant
to the provisions of Section 12 hereof.

         9.  Reorganization of the Company. In the event that during the term of
this  Agreement  the  Company  is  merged  into  or  consolidated  with  another
corporation,  or all or  substantially  all of the  assets  of the  Company  are
transferred  to  another  corporation,  this  Agreement,  and the Trust  created
hereby, shall terminate within thirty (30) days of such merger, consolidation or
transfer, pursuant to the provisions of Section 12 hereof.

         10.  Rights of  Trustee.  The  Trustee  shall in its sole and  absolute
discretion  exercise,  in person or by its nominee or proxy,  all  stockholders'
rights and powers in respect of all Deposited Shares,  and all additional shares
of  Capital  Stock  deposited  hereunder,  including  the  right to vote and act
thereon  for every  purpose  at all  meetings  of the  security  holders  of the
Company, in the election of trustees, and upon any and all matters and questions
which may be brought before such meetings and to consent to any corporate act of
the Company.
<PAGE>
                                      -6-

         The  interpretation  by  the  Trustee  of  the  terms,  provisions  and
conditions of this Agreement and any Voting Trust Certificates  issued hereunder
shall be conclusive and binding upon the Beneficiary and on all other interested
parties. The Trustee is hereby expressly authorized to do any and all acts which
it deems  necessary  or  advisable  in  connection  with the carrying out of the
terms, provisions and conditions of this Agreement. The Trustee may exercise any
power or perform any act under this Agreement by an agent or attorney, appointed
in writing,  and may employ  counsel and agents  whose  reasonable  expenses and
compensation  shall be paid by the Trustee and shall be  chargeable  as a proper
expense to the Beneficiary, as provided in Section 11 hereof.

         If  there  shall,  at any  time,  be  more  than  one  Trustee  serving
hereunder,  all actions and  decisions of the Trustees  shall be determined by a
unanimous  vote of the  Trustees,  and if the Trustees  shall be unable to agree
with  respect to any matter or group of  matters,  any  Trustee may appeal to an
appropriate  court located in The  Commonwealth of  Massachusetts,  for an order
appointing an additional  Trustee to act with respect to such matter or matters,
whose vote with respect to such matter or matters shall be final.

         The  Trustee  (if an  individual)  may be a trustee  or  officer of the
Company, or both, and may, as Trustee, vote for himself as such, and may receive
compensation  therefor from the Company for his  individual  use and benefit.  A
Trustee may,  individually,  serve the Company in any other capacity and in such
capacity  receive  from the  Company  compensation  for his  individual  use and
benefit, and may, individually, enter into any contract with the Company.

         The rights,  powers and privileges of the Trustee named hereunder shall
be  possessed  by any  successor  Trustee,  with the same  effect as though such
successor had originally  been party to this Agreement.  The word "Trustee",  as
used in this Agreement,  means the Trustee or any successor  trustee or trustees
acting  hereunder,  and shall  include  both the single and plural  number.  The
office of the  Trustee  is  currently  located  at 400  Centre  Street,  Newton,
Massachusetts 02158.

         11. Compensation and Reimbursement of Trustee. The Trustee shall not be
entitled to compensation for services  rendered and duties performed  hereunder.
The Trustee shall be entitled to be  reimbursed  and  indemnified  for and saved
harmless from any and all reasonable expenses, charges, costs, damages and other
liabilities  arising  out of its  acceptance  of this trust and the  issuance of
Voting Trust  Certificates  hereunder,  or incurred by it in connection with the
performance and discharge of its duties and services as Trustee,  except in case
of its own gross  negligence  or willful  misconduct.  Such  expenses,  charges,
costs,  damages and other  liabilities  shall be assumed,  borne and paid by the
Beneficiary.
<PAGE>
                                      -7-

         No Trustee shall incur or be subject to any liability or responsibility
as shareholder, trustee or otherwise by reason of any act, failure to act, error
of judgment,  error of law or other error  committed in performing its functions
hereunder,  except  for its own gross  negligence  or  willful  misconduct.  The
Trustee shall not be required to give any bond for the faithful  performance and
discharge of its duties hereunder.

         12. Term of Agreement;  Termination.  This Agreement  shall continue in
effect earlier of December 28, 2000 or such time as all of the Obligations shall
have been paid and satisfied in full and the Amended and Restated  Shares Pledge
Agreement  shall have been  terminated,  unless  sooner  terminated by a writing
executed by the Beneficiary and the Trustee;  provided,  however that within two
(2) years prior to the  termination  of the initial term or any  extension  term
hereof,  the  Beneficiary may agree to extend the duration of this Agreement for
an  additional   period,  not  to  exceed  ten  (10)  years  in  any  one  case.
Notwithstanding the foregoing,  at such time, if ever, as fifty percent (50%) of
the Pledged  Shares are released  from the lien created by the Pledge  Agreement
pursuant to the terms thereof, a like number of shares of Capital Stock shall be
released from the Voting Trust created  hereby.  The  Beneficiary  acknowledges,
however,  that any Pledged Shares  released from the Amended and Restated Shares
Pledge  Agreement  are subject to  re-pledging  as  provided  therein and hereby
agrees, in the event that any Pledged Shares previously  released are re-pledged
under the Amended and Restated  Shares Pledge  Agreement,  that such  re-pledged
shares  shall  likewise  become  subject  to the  terms and  conditions  of this
Agreement and stock certificates  representing such re-pledged shares,  together
with stock powers duly endorsed in blank, shall be deposited with the Trustee at
such time as the shares are re-pledged.

         Upon  termination of this Agreement,  the Trustee,  in exchange for and
upon the  surrender  of any Voting Trust  Certificate  then  outstanding  by the
registered holder thereof, shall, in accordance with the terms thereof, transfer
a  certificate  or  certificates  of shares of Capital Stock held by the Trustee
hereunder  to the  registered  holder of such Voting  Trust  Certificate,  in an
amount equal to the number of shares of Capital Stock the beneficial interest in
which is represented by such surrendered Voting Trust  Certificates.  Thereupon,
all  liability  of the Trustee for  delivery of such  certificates  of shares of
Capital Stock shall terminate,  and the Voting Trust Certificates so surrendered
shall be null and void. The Trustee  acknowledges that the transfer of shares of
Stock  deposited  hereunder is restricted  by the  provisions of the Amended and
Restated  Shares  Pledge  Agreement  and agrees  that it shall not  deliver  any
certificates  for  shares of Capital  Stock,  and the  holders  of Voting  Trust
Certificates shall, by accepting the same, be conclusively deemed to have agreed
that the Trustee  shall not be required  to deliver  any  certificates  for such
shares of Capital Stock, to any person whose acquisition of the same would be in
violation of the Amended and Restated Shares Pledge Agreement.
<PAGE>
                                      -8-

         13.  Event of  Default  under the  Pledge  Agreement.  The  Beneficiary
acknowledges  that upon the  occurrence of an Event of Default under the Amended
and  Restated  Shares  Pledge  Agreement  the  Company  may  elect  to sell  the
Collateral   (including  any  additional   shares  of  Capital  Stock  deposited
hereunder),  or any part thereof,  in one or more sales pursuant to the terms of
the Amended and Restated Shares Pledge Agreement.  Accordingly,  the Beneficiary
and the Trustee agree that upon  notification by the Company to the Trustee that
an Event of Default has occurred,  and delivery by the Company to the Trustee of
the Voting Trust  Certificate(s)  held by the Company in pledge  pursuant to the
terms and conditions of the Amended and Restated  Shares Pledge  Agreement,  the
Trustee shall  forthwith  transfer to the Company a certificate or  certificates
for shares of Capital Stock held by the Trustee  hereunder in an amount equal to
the  number of shares of  Capital  Stock  the  beneficial  interest  in which is
represented by such  surrendered  Voting Trust  Certificate(s).  Thereupon,  all
liability of the Trustee for delivery of stock  certificates  representing  such
shares of Capital Stock shall terminate and the Voting Trust  Certificate(s)  so
surrendered shall be null and void.

         14. Amendments.  This Agreement may be amended at any time by a written
instrument   executed  by  the  Trustee  and  assented  to  in  writing  by  the
Beneficiary.

         15. Notices and Distributions.  Unless otherwise  specifically provided
in this  Agreement,  any notice to or  communication  with the holders of Voting
Trust  Certificates  hereunder  shall be in writing and shall be sufficient when
sent by  registered  or  certified  mail  addressed  to such  holders  at  their
respective  addresses  appearing  on the  transfer  books  of the  Trustee.  The
addresses of the holders of Voting Trust Certificates,  as shown on the transfer
books of the Trustee, shall in all cases be deemed to be the addresses of Voting
Trust Certificate holders for all purposes under this Agreement. Every notice so
given shall be effective, whether or not received, and the date of mailing shall
be the date such notice is deemed given for all purposes.

         Any notice to the  Trustee  hereunder  shall be in writing and shall be
sufficient if sent by registered or certified mail to the Trustee,  addressed to
it at such address or addresses as may from time to time be furnished in writing
to the holders of Voting Trust Certificates,  and if no such address has been so
furnished by the Trustee, then addressed to the Trustee in care of the Company.

         All distributions of cash,  securities or other property hereunder,  if
any, in respect of the Voting Trust  Certificates may be made, in the discretion
of the  Trustee,  by  registered  or  certified  mail  in  the  same  manner  as
hereinabove  provided  for the giving of notice to the  holders of Voting  Trust
Certificates.
<PAGE>
                                      -9-

         16.  Severability.  If, for any reason,  any provision hereof or of any
Voting  Trust  Certificate  shall be invalid or  inoperative,  the  validity and
effect of the other provisions hereof or thereof shall not be affected thereby.

         17. Acceptance of Trust. The Trustee hereby reaffirms its acceptance of
the trust hereunder,  subject to all of the terms, provisions and conditions set
forth  herein,  and agrees  that it will  continue  to  exercise  the powers and
perform  the duties of  Trustee  as set forth  herein;  provided,  however  that
nothing  contained  herein  shall be  construed  to  prevent  the  Trustee  from
resigning and discharging itself from the trust established by this Agreement.

         18. NONLIABILITY OF TRUSTEES. THE DECLARATION OF TRUST ESTABLISHING THE
COMPANY,  DATED OCTOBER 9, 1986, A COPY OF WHICH,  TOGETHER WITH ALL  AMENDMENTS
THERETO (THE  "DECLARATION"),  IS DULY FILED WITH THE  DEPARTMENT OF ASSESSMENTS
AND  TAXATION  OF THE STATE OF  MARYLAND,  PROVIDES  THAT THE NAME  "HEALTH  AND
REHABILITATION  PROPERTIES  TRUST" REFERS TO THE TRUSTEES UNDER THE  DECLARATION
COLLECTIVELY  AS  TRUSTEES,  BUT NOT  INDIVIDUALLY  OR  PERSONALLY,  AND THAT NO
TRUSTEE, OFFICER, SHAREHOLDER, EMPLOYEE OR AGENT OF THE COMPANY SHALL BE HELD TO
ANY PERSONAL  LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM
AGAINST,  THE COMPANY.  ALL PERSONS DEALING WITH THE COMPANY,  IN ANY WAY, SHALL
LOOK  ONLY  TO THE  ASSETS  OF THE  COMPANY  FOR THE  PAYMENT  OF ANY SUM OR THE
PERFORMANCE OF ANY OBLIGATION.

         19. GOVERNING LAW. EXCEPT AS TO MATTERS  REGARDING THE INTERNAL AFFAIRS
OF  HRP  AND  ISSUES  OF  OR  LIMITATIONS  ON  ANY  PERSONAL  LIABILITY  OF  THE
SHAREHOLDERS AND TRUSTEES OF HRP FOR OBLIGATIONS OF HRP, AS TO WHICH THE LAWS OF
THE  STATE OF  MARYLAND  SHALL  GOVERN,  THIS  AGREEMENT  AND ANY  VOTING  TRUST
CERTIFICATE  ISSUED  HEREUNDER  SHALL BE  INTERPRETED,  CONSTRUED,  APPLIED  AND
ENFORCED  IN  ACCORDANCE  WITH AND  GOVERNED  BY THE LAWS  (OTHER  THAN THE LAWS
GOVERNING CONFLICTS OF LAWS) OF THE COMMONWEALTH OF MASSACHUSETTS.

                           (Intentionally left blank.]
<PAGE>
                                      -10-

         IN WITNESS  WHEREOF,  the Beneficiary and the Trustee have hereunto set
their hands as an instrument under seal, as of the date first above written.

                                     TRUSTEE:

                                     HRPT ADVISORS, INC.


                                     By /s/ David J. Hegarty
                                        Name:  David J. Hegarty
                                        Title:


                                     BENEFICIARY:

                                     AMS PROPERTIES, INC.


                                     By /s/  Kevin W. Pendergest
                                        Name:  Kevin W. Pendergest
                                        Title:  Executive Vice President


         Signature page for Amended and Restated Voting Trust  Agreement,  dated
as of June 30, 1992, by and between AMS Properties, Inc. as Beneficiary and HRPT
Advisors, Inc., as Trustees.

<PAGE>


                                                                    EXHIBIT A to
                                                          VOTING TRUST AGREEMENT

THE SECURITIES  REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED,  OR REGISTERED OR QUALIFIED UNDER ANY STATE  SECURITIES
LAWS, AND SUCH SECURITIES MAY NOT BE SOLD,  TRANSFERRED OR OTHERWISE DISPOSED OF
IN THE  ABSENCE  OF AN  EFFECTIVE  REGISTRATION  STATEMENT  UNDER  SAID  ACT AND
REGISTRATION  AND  QUALIFICATION  UNDER ALL APPLICABLE  STATE SECURITIES LAWS OR
PURSUANT TO EXEMPTIONS THEREFROM.  THIS CERTIFICATE MAY NOT BE SOLD OR OTHERWISE
TRANSFERRED  EXCEPT  IN  ACCORDANCE  WITH THE  PROVISIONS  OF THE  VOTING  TRUST
AGREEMENT  REFERRED TO HEREIN.  THIS  CERTIFICATE IS FURTHER  SUBJECT TO, AND NO
TRANSFERS OF THE SECURITIES REPRESENTED HEREBY SHALL BE VALID OR EFFECTIVE UNTIL
COMPLIANCE WITH THE CONDITIONS SPECIFIED IN, THE AMENDED AND RESTATED HRP SHARES
PLEDGE  AGREEMENT,  DATED AS OF JUNE 30,  1992  AMONG  THE  BENEFICIARY  AND THE
COMPANY,  AS SUCH AGREEMENT MAY BE FURTHER AMENDED OR SUPPLEMENTED.  EACH HOLDER
OF THIS  CERTIFICATE  AGREES TO BE BOUND BY THE  PROVISIONS OF SAID  AGREEMENTS,
COPIES OF WHICH ARE  AVAILABLE  WITHOUT  CHARGE UPON  WRITTEN  REQUEST  FROM THE
PRINCIPAL OFFICE OF THE COMPANY.

                   HEALTH AND REHABILITATION PROPERTIES TRUST
                     a Maryland real estate investment trust

Voting Trust Certificate for Common Shares of Beneficial Interest

No._________                                               Shares__________

         THIS IS TO CERTIFY  THAT  ____________,  a  _____________  corporation,
(the"Holder")  is the  beneficial  owner of  ________________  Common  Shares of
Beneficial Interest, $.0l par value, (the "Shares") of Health and Rehabilitation
Properties Trust, a Maryland real estate  investment trust (the "Company"),  and
that said  Shares  are held  subject  to all of the terms  and  conditions  of a
certain  Amended and Restated  Voting Trust  Agreement dated as of June 30, 1992
(as the same may be amended,  modified or  supplemented  from time to time,  the
"Agreement")  by and  among the  Holder  and HRPT  Advisors,  Inc.,  a  Delaware
corporation,  as Trustee (the  "Trustee"),  which  Agreement is expressly made a
part hereof and incorporated herein by reference. A counterpart of the Agreement
is on file and available for inspection by the  registered  holder hereof or his
delegate at the  Company's  principal  place of  business at 400 Centre  Street,
Newton,  Massachusetts  02158,  at any time during normal business hours without
charge.

         The above-named  Holder accepts this Certificate  subject to all of the
terms and conditions of the Agreement and by such  acceptance  such Holder shall
become  a party  to the  Agreement  and  shall be  entitled  to all the  rights,
privileges and interests of such a party and shall

be bound by all of the terms of and subject to all of the duties and obligations
set  forth  in the  Agreement,  all as more  fully  provided  therein,  it being
expressly stipulated,  however, that no voting right passes to the Holder hereof
by or

<PAGE>

                                      -2-

under this  Certificate  or by or under the  Agreement  or any other  agreement,
express or implied.

         This Certificate is transferable only on the books of the Trustee, upon
presentation and surrender of this Certificate,  properly assigned and endorsed,
by  the  registered  holder  hereof,  either  in  person  or  by  attorney  duly
authorized,  in the manner  prescribed in the Agreement and according to any and
all rules that may be established by the Trustee for transfers of  Certificates,
and is subject to  restrictions on transfer,  resale  obligations and compliance
with the Securities Act of 1933, as amended,  and a certain Amended and Restated
HRP  Shares  Pledge  Agreement  dated  as of June 30,  1992,  as the same may be
amended,  modified or supplemented  from time to time between the Holder and the
Company,  all  as  referred  to  above.  Until  this  Certificate  has  been  so
transferred  in  accordance  with any such  rules,  the  Trustee  may  treat the
registered holder as the owner hereof for all purposes whatsoever.

         Upon the termination of the Agreement,  the  above-named  Holder or his
personal  representative  will be entitled,  upon  surrender  hereof as provided
above and in the Agreement,  and upon payment to the Trustee of a sum sufficient
to reimburse the Trustee for any tax or government  charge,  if any,  imposed in
connection with any transfer of shares of Stock  represented  hereby, to receive
certificates  for the  above-written  number  of fully  paid and  non-assessable
shares of Stock deposited with and held by the Trustee  pursuant to the terms of
the Agreement.

         Until the actual  delivery of such  certificates  of shares of Stock by
the Trustee as  provided  above and in the  Agreement,  the  Trustee  shall,  in
respect  of any and all such  shares of Stock  held by it under  the  Agreement,
possess  and be entitled to  exercise  all  Shareholders'  rights of every kind,
including  the right to vote on, to take part in, or to consent to any corporate
action, as provided for in the Agreement.

         This Certificate  shall not be valid unless and until signed by all the
Trustees in office at the date of issue.

         IN WITNESS WHEREOF, the undersigned Trustee has caused this Certificate
to be executed this 30th day of June, 1992.

                                    HRPT ADVISORS, INC., as Trustee


                                    By:_________________________________
                                          Its________________________


<PAGE>


         FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
to  _______________________  the within Certificate and all rights and interests
represented  thereby,  and  does  hereby  irrevocably   constitute  and  appoint
___________________ attorney to transfer the said Certificate on the register of
Certificate  holders maintained by the Trustee,  with full power of substitution
in the premises.

         IN WITNESS  WHEREOF,  the  undersigned  has caused these presents to be
executed this _______________ day of _______________________, 1992.

In the presence of:                       AMS PROPERTIES, INC.


______________________________            By_______________________________
                                               Its

                                     NOTICE

         The signature on this assignment must correspond with the above-written
name of the Holder of this Certificate in every particular,  without  alteration
or any change whatever.


                                                                    EXHIBIT 23.1


                         CONSENT OF INDEPENDENT AUDITORS


We consent to the  reference to our firm under the caption  "Experts" and to the
use of our report dated July 1, 1999, except for Note 1, as to which the date is
September 1, 1999,  with respect to the  consolidated  financial  statements and
schedules of Senior Housing Properties Trust included in pre-effective amendment
No. 3 to the Registration Statement (Form S-11) and related prospectus of Senior
Housing Properties Trust.



                                                    /s/ERNST & YOUNG LLP



Boston, Massachusetts
September 1, 1999

<TABLE> <S> <C>


<ARTICLE>                     5
<MULTIPLIER>                                   1,000

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-START>                                 JAN-01-1999
<PERIOD-END>                                   JUN-30-1999
<CASH>                                         168
<SECURITIES>                                   0
<RECEIVABLES>                                  37,638
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               0
<PP&E>                                         732,393
<DEPRECIATION>                                 105,823
<TOTAL-ASSETS>                                 674,294
<CURRENT-LIABILITIES>                          0
<BONDS>                                        0
                          0
                                    0
<COMMON>                                       0
<OTHER-SE>                                     630,934
<TOTAL-LIABILITY-AND-EQUITY>                   674,294
<SALES>                                        0
<TOTAL-REVENUES>                               45,290
<CGS>                                          0
<TOTAL-COSTS>                                  23,458
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             9,992
<INCOME-PRETAX>                                21,832
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            21,832
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   21,832
<EPS-BASIC>                                  0
<EPS-DILUTED>                                  0



</TABLE>


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