MENTOR INSTITUTIONAL TRUST
485BPOS, 1996-11-01
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    As filed with the Securities and Exchange Commission on November 1, 1996
    

                                                      Registration No. 33-80787
                                                              File No. 811-8484

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

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM N-1A


            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933    / X /

                          Pre-Effective Amendment No.                  /   /

   
                         Post-Effective Amendment No. 8                / X /
    

              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY      / X /
                                   ACT OF 1940
   
                                Amendment No. 11                       / X /
    
                        (Check appropriate box or boxes)

                           MENTOR INSTITUTIONAL TRUST
                   (Exact name of registrant as specified in charter)

                                  P.O. Box 1357
                            Richmond, Virginia 23286
                    (Address of principal executive offices)

       Registrant's Telephone Number, including Area Code (804) 782-3647

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

                           PAUL F. COSTELLO, President
                              901 East Byrd Street
                            Richmond, Virginia 23219
                     (Name and address of agent for service)

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

                                    Copy to:
                           TIMOTHY W. DIGGINS, Esquire
                                  ROPES & GRAY
                             One International Place
                           Boston, Massachusetts 02110

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

It is proposed that this filing will become effective (check appropriate box):
   
/ X / immediately upon filing pursuant to paragraph (b)
    
/   / on [date] pursuant to para raph (b)

/   / 60 days after filing pursuant to paragraph (a)

/   / on (date) pursuant to paragraph (a)(1)

/   / 75 days after filing pursuant to paragraph (a)(2)

/   / on (date) pursuant to paragraph (a)(2) of Rule 485

                                                      -1-



<PAGE>



      If appropriate, check the following box:

/   / This post-effective amendment designates a new effective date for a
      previously filed post-effective amendment.
   
      Mentor Institutional Trust registered an indefinite amount of securities
under the Securities Act of 1933 pursuant to Rule 24f-2 of the Investment
Company Act of 1940. A Rule 24f-2 notice in respect of the SNAP Fund (the
portfolio to which this amendment relates) was filed on August 23, 1996.

      THIS POST-EFFECTIVE AMENDMENT RELATES SOLELY TO THE SNAP FUND.  NO
INFORMATION RELATING TO ANY OTHER SERIES OF THE REGISTRANT IS AMENDED
OR SUPERSEDED HEREBY.
    
                                                      -2-



<PAGE>



                           MENTOR INSTITUTIONAL TRUST
                                   SNAP FUND
                             CROSS REFERENCE SHEET

                          (as required by Rule 404(c))

Part A

     N-1A Item No.

     Location

1.   Cover Page............................Cover Page
2.   Synopsis..............................Cover Page; Expense summary
   
3.   Condensed Financial Information.......Financial highlights
    
4.   General Description of Registrant.....Cover Page; Investment objectives
                                           and policies; How the Fund values its
                                           shares; How distributions are made;
                                           Mentor Institutional Trust; Custodian
                                           and Transfer and Dividend Agent
5.   Management of the Fund................Investment  objectives and
                                           policies; Management of the Fund
5A.  Management's Discussion
       of Fund Performance.................Not Applicable
6.   Capital Stock and Other
       Securities..........................How the Fund values its shares;
                                           How distributions are made; How
                                           to participate in the Fund; How to
                                           redeem shares
7.   Purchase of Securities Being
       Offered.............................How to participate in the Fund;
                                           How to redeem shares

8.   Redemption or Repurchase..............How to participate in the Fund;
                                           How to redeem shares
9.   Pending Legal Proceedings.............Not Applicable

                                                   -3-

<PAGE>


Part B

      N-1A Item No.

      Location

10.   Cover Page...........................Cover Page
11.   Table of Contents....................Cover Page
   
12.   General Information and History......Cover Page
    
13.   Investment Objectives and
        Policies...........................Investment Restrictions; Ratings
14.   Management of the Fund...............Management of the Trust
15.   Control Persons and Principal
        Holders of Securities..............Management of the Trust;
                                           Principal Holders of Securities
16.   Investment Advisory and Other
        Services...........................Management of the Trust;
                                           Investment Advisory and other
                                           Securities; Officers of
                                           Commonwealth; Independent
                                           Accountants; Custodian
17.   Brokerage Allocation.................Management of the Trust;
                                           Brokerage
18.   Capital Stock and Other
        Securities.........................Determination of Net Asset Value;
                                           Tax Status
19.   Purchase, Redemption and Pricing
        of Securities Being Offered........Management of the Trust;
                                           Determination of Net Asset Value
20.   Tax Status...........................Tax Status
21.   Underwriters.........................Not applicable
22.   Calculations of Yield Quotations
        of Money Market Funds..............Performance Information
23.   Financial Statements.................Financial Statements

Part C

         Information required to be included in Part C is set forth under the
appropriate Item, so numbered, in Part C of the Registration Statement.

                                                      -4-



<PAGE>


P R O S P E C T U S                                             November 1, 1996




                                    SNAP FUND
   
     SNAP Fund is a diversified, open-end "money-market" fund, seeking as high a
rate of current income as Mentor Investment Advisors, LLC, its investment
adviser ("Mentor Advisors"), believes is consistent with preservation of capital
and maintenance of liquidity. The Fund currently offers its shares only to
participants in the Commonwealth of Virginia State Non- Arbitrage Program (the
"SNAP Program"). The Fund is a series of shares of Mentor Institutional Trust.
    
     An investment in the Fund is neither insured nor guaranteed by the U.S.
Government.  There can be no assurance that the Fund will be able to maintain a
stable net asset value of $1.00 per share.
   
     This Prospectus sets forth concisely the information about the Fund and
Mentor Institutional Trust that a prospective investor should know before
investing. Please read this Prospectus and retain it for future reference.
Investors can find more detailed information in the November 1, 1996 Statement
of Additional Information (the "Statement"), as amended from time to time. For a
free copy of the Statement, call 1-800-570-SNAP. The Statement has been filed
with the Securities and Exchange Commission and is incorporated into this
Prospectus by reference. The Fund's address is P.O. Box 1357, Richmond, Virginia
23286-0109.
    
                           -------------------------

    SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
       ENDORSED BY, ANY FINANCIAL INSTITUTION AND ARE NOT INSURED BY THE
           FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE
                          BOARD, OR ANY OTHER AGENCY.

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
       THE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
             ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESEN-
                 TATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                      -1-



<PAGE>



Expense summary
   
             Expenses are one of several factors to consider when investing in
the Fund. The following table summarizes an investor's maximum transaction costs
from investing in the Fund and expenses the Fund expects to incur based on its
last fiscal year. The Example shows the cumulative expenses attributable to a
hypothetical $1,000 investment in the Fund over specified periods. Shares of the
Fund are currently being offered to investors through the Commonwealth of
Virginia State Non-Arbitrage Program (the "SNAP Program"). Only expenses
incurred by the Fund are reflected in the tables and Example below; other
expenses incurred by the SNAP Program, or by participants in the SNAP Program,
are not reflected.
    
             Shareholder Transaction Expenses:
             Maximum Sales Load Imposed on Purchases                      None
             Maximum Sales Load Imposed on Reinvested Dividends           None
             Deferred Sales Load                                          None
             Redemption Fees                                              None
             Exchange Fee                                                 None

                   Annual Fund Operating Expenses:
                   (as a percentage of average net assets)
   
                      Management Fees                                    0.09%
                      12b-1 Fees                                         0.00%
                      Other Expenses                                     0.03%
                                                                         ----
                        Total Fund Operating Expenses                    0.12%
                                                                         ====
    

Example

                   An investment of $1,000 in the Fund would incur the following
expenses, assuming 5% annual return and redemption at the end of each period:

   
                  1 year    3 years     5 years    10 years
                  ------    -------     -------    --------
                    $2        $4          $7         $16
                  ======    =======     =======    ========

         This information is provided to help investors understand the operating
expenses of the Fund. The Example should not be considered a representation of
future performance; actual expenses may be more or less than those shown.
    
                                                      -2-



<PAGE>



Financial Highlights
   
         The financial highlights presented below for the Fund have been audited
by KPMG Peat Marwick LLP, independent auditors. The report of KPMG Peat Marwick
LLP is contained in the Fund's financial statements which are included in the
Statement, and is incorporated into this prospectus by reference, and may be
obtained by calling 1-800-570-SNAP. The Fund commenced operations as a
registered investment company on July 24, 1995.

                                                                  Period from
                                                                  7/24/95 to
                                                                    6/30/96

Per Share Operating Performance                                      $1.00
Income from investment operations                                     0.05*
Net investment income                                                  -
Net realized gain on investments
     Total from investment operations                                 0.05

Distributions from net investment income                             (0.05)*

Net asset value, end or period                                       $1.00

Total Return                                                          5.29%

Ratios/Supplemental Data

Net assets, end of period (in thousands)                             $954,777

Ratio of expenses to average net assets                                 0.12%(a)

Ratio of net investment income to average
  net assets                                                            5.53%(a)

- -----------------
(a) Annualized.

*Includes net realized capital gains which were under $0.01 per share.
    
                                                      -3-



<PAGE>



Investment objective and policies
   
     SNAP Fund's investment objective is to seek as high a rate of current
income as Mentor Advisors believes is consistent with preservation of capital
and maintenance of liquidity. There can, of course, be no assurance that the
Fund will achieve its investment objective. As a matter of policy, the Trustees
will not change the Fund's investment objective without shareholder approval.
    
     The Fund will invest in a portfolio of high-quality short-term instruments
consisting of any or all of the following:

o    U.S. Government securities: U.S. Treasury bills, notes, and bonds, and
     securities unconditionally guaranteed as to payment of principal and
     interest by the United States or any agency of the United States.

o    Obligations of the Commonwealth of Virginia and of its local governments
     and of other states: high-quality evidences of indebtedness of the
     Commonwealth of Virginia, and obligations of any county, city, town,
     district, authority, or other public body of the Commonwealth. The Fund may
     also invest in high-quality-obligations of any other state or of any
     county, city, town, or district located in any other state.

o    Bankers' acceptances: negotiable drafts or bills of exchange, which have
     been "accepted" by a bank, meaning, in effect, that the bank has
     unconditionally agreed to pay the face value of the instrument on maturity.
     The Fund will only purchase bankers' acceptances issued by a bank organized
     in the U.S. or by a foreign bank with an agency domiciled in the U.S.

o    Certificates of deposit and interest-bearing time deposits: of  national
     banks or of banks chartered by the Commonwealth of Virginia or of banks
     chartered by other states and authorized to operate branches in the
     Commonwealth of Virginia (if such banks chartered by the Commonwealth or
     other states are under the supervision of the Commonwealth of Virginia and
     the deposits are secured as provided by the Virginia Security for Public
     Deposits Act). The amount of any deposit must be insured in its entirety by
     the Federal Deposit Insurance Corporation, except to the extent any such
     amount is collateralized by eligible collateral as prescribed by law.   Any
     time deposits made by the Fund must mature in seven days or less.

o    Prime commercial paper: high-quality, short-term obligations issued by
     banks, corporations, and other issuers organized under the laws of the
     United States or of any state.

o    Other short-term obligations: high-quality, short-term obligations of
     corporate issuers.
   
o    Repurchase agreements: with respect to U.S. Government or agency
     securities. Under a repurchase agreement, the Fund purchases a U.S.
     Government security for a relatively short period (usually not more than
     one week) which the seller agrees to repurchase at a fixed time and price,
     representing the Fund's cost plus interest. The Fund will enter into
     repurchase agreements only with commercial banks having assets of more than
     $1 billion and with "primary dealers" in U.S. Government securities.
     Although Mentor Advisors will monitor repurchase agreement transactions to
     ensure that they will be fully collateralized at all times, the Fund bears
     a risk of loss if the other party defaults on its obligation and the Fund
     is delayed or prevented from exercising its rights to dispose of the
     collateral. If the other party

                                                      -4-



<PAGE>



     should become involved in bankruptcy or insolvency proceedings, it is
     possible that the Fund may be treated as an unsecured creditor and be
     required to return the underlying collateral to the other party's estate.
     The Fund requires any U.S. Government securities serving as collateral for
     a repurchase agreement to be delivered to the Fund's custodian (or any
     approved subcustodian).
    

     The Fund will invest only in U.S. dollar-denominated high-quality
securities and other U.S. dollar-denominated money market instruments meeting
credit criteria which the Trustees believe present minimal credit risk.
"High-quality securities" are (i) commercial paper or other short-term
obligations rated A-1 by Standard & Poor's Corporation and P-1 by Moody's
Investors Service, Inc., and (ii) other obligations rated AAA or AA by Standard
& Poor's and Aaa or Aa by Moody's at the time of investment. The Fund will not
purchase securities of any issuer (other than U.S. Government securities) if,
immediately thereafter, more than 5% of the Fund's total assets would be
invested in securities of that issuer (or 1% of the Fund's total assets, or $1
million, whichever is greater, if the securities of such issuer owned by the
Fund are not rated in the highest rating category by a nationally recognized
statistical rating organization), nor will the Fund make an investment in
commercial paper if, immediately thereafter, more than 35% of its total assets
would be invested in commercial paper.

       The Fund follows investment and valuation policies designed to maintain a
stable net asset value of $1.00 per share, although there is no assurance that
these policies will be successful. The Fund will maintain a dollar-weighted
average maturity of 90 days or less and will not invest in securities with
remaining maturities of more than one year. The Fund may invest in variable or
floating-rate securities which bear interest at rates subject to periodic
adjustment or which provide for periodic recovery of principal on demand. Under
certain conditions, these securities may be deemed to have remaining maturities
equal to the time remaining until the next interest adjustment date or the date
on which principal can be recovered on demand.
   
     Considerations of liquidity and preservation of capital mean that the Fund
may not necessarily invest in money market instruments paying the highest
available yield at a particular time. Consistent with its investment objective,
the Fund will attempt to maximize yields by portfolio trading and by buying and
selling portfolio investments in anticipation of or in response to changing
economic and money market conditions and trends. The Fund may also invest to
take advantage of what Mentor Advisors believes to be temporary disparities in
yields of different segments of the high-quality money market or among
particular instruments within the same segment of the market. These policies, as
well as the relatively short maturity of obligations purchased by the Fund, may
result in frequent changes in the Fund's portfolio. The Fund will not usually
pay brokerage commissions in connection with the purchase or sale of portfolio
securities.
    
     The Fund's portfolio will be affected by general changes in interest rates
resulting in increases or decreases in the values of the obligations held by the
Fund. The value of the securities in the Fund's portfolio can be expected to
vary inversely to the changes in prevailing interest rates.

                                                      -5-



<PAGE>



Withdrawals by shareholders could require the sale of portfolio investments at a
time when such a sale might not otherwise be desirable.
   
     The Fund will not lend money, other than by investment in the instruments
described above and through entry into repurchase agreements, nor will it borrow
money or pledge, hypothecate, or mortgage its assets. The Fund will not invest
in securities of an issuer if any employee of the Fund or Mentor Advisors (or,
to the knowledge of the Fund or Mentor Advisors, any affiliated person of the
Fund or Mentor Advisors) is an officer or director of that issuer or holds 10%
of the outstanding voting securities of that issuer, unless the investment is
approved or ratified by the Trustees.
    
     The Fund will not be responsible for determining whether income or gains
from any investment by the Fund will be excludable from the income of
participants in the SNAP Program for tax purposes, or will otherwise be subject
to or exempt from taxation under federal or state law or be subject to rebate by
participants under federal law.

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

     All percentage limitations on investments will apply at the time of
investment and shall not be considered violated unless an excess or deficiency
occurs or exists immediately after and as a result of such investment.

Management of the Fund
   
     The Trustees of Mentor Institutional Trust are responsible for generally
overseeing the conduct of the Trust's business. Mentor Investment Advisors, LLC,
located at 901 East Byrd Street, Richmond, Virginia 23219, acts as investment
adviser to the Fund pursuant to a Management Contract between the Fund and
Mentor Advisors. Mentor Advisors is the successor to Commonwealth Investment
Counsel, Inc. Subject to the general oversight of the Trustees, Mentor Advisors,
as investment adviser, manages the Fund's portfolio in accordance with the
stated policies of the Fund. Mentor Advisors makes investment decisions for the
Fund and places the purchase and sale orders for the Fund's portfolio
transactions. A team of investment professionals manages the Fund for Mentor
Advisors. As compensation for Mentor Advisors' services under the Management
Contract, the Fund pays a fee, accrued daily and paid monthly, at the following
annual rate: .09% of the first $500 million of average net assets; .08% of the
next $250 million; .07% of the next $250 million; .06% of the next $250 million;
and .05% of any amount over $1.25 billion. Mentor Advisors is a wholly owned
subsidiary of Mentor Investment Group, LLC, which is in turn a subsidiary of
Wheat First Butcher Singer, Inc. ("Wheat First Butcher Singer"). Wheat First
Butcher Singer, through other subsidiaries, also engages in securities
brokerage, investment banking, and related businesses. Mentor Advisors, along
with its affiliates, currently has assets under management of approximately $4
billion, and serves as investment adviser to twenty-one separate portfolios in
the Mentor Family of Funds, including the Fund.

                                                      -6-



<PAGE>



The Fund pays all of its own expenses, including, among other things, Trustees'
fees, and auditing, legal, and custodial expenses.
    
How the Fund values its shares

     The Fund values its shares twice each day, once at 12:00 noon and again at
the close of regular trading on the New York Stock Exchange. The Fund's
investments are valued at amortized cost according to Securities and Exchange
Commission Rule 2a-7. The Fund will not normally have unrealized gains or losses
so long as it values its investments by the amortized cost method.

How distributions are made

     The Fund declares all of its net interest income as a distribution on each
day the New York Stock Exchange is open for business, as a dividend to
shareholders of record immediately prior to the close of regular trading on the
Exchange. Shareholders who purchase shares of the Fund as of 12:00 noon on any
day will receive the dividend declared by the Fund for that day; shareholders
who purchase shares after 12:00 noon will begin earning dividends on the day
after the Fund accepts their order. The Fund's net income for Saturdays,
Sundays, and holidays is declared as a dividend on the preceding business day.
Dividends for any month will be paid on the last day of that month (or, if that
day is not a business day, on the preceding business day), except that the
Fund's schedule for payment of dividends during the month of December may be
adjusted to assist in the Fund's tax reporting and distribution requirements.
All distributions will be reinvested automatically in Fund shares as of the
payment date, unless the shareholder instructs the Fund to pay distributions to
it in cash. Since the net income of the Fund is declared as dividend each time
it is determined, the net asset value per share of the Fund normally remains at
$1 per share immediately after each determination and dividend declaration.

     The Fund intends to qualify as a "regulated investment company" for federal
income tax purposes to be relieved of federal taxes on income and gains it
distributes to shareholders. The Fund will distribute substantially all of its
net investment income and capital gain net income on a current basis.
Shareholders are urged to consult their tax advisers regarding specific
questions as to federal, state, or local taxes.

How to participate in the Fund

     Shares of the Fund are currently being offered only to participants in the
Commonwealth of Virginia State Non-Arbitrage Program (the "SNAP Program").
Participants in the SNAP Program wishing to purchase shares of the Fund should
consult the Information Statement of the SNAP Program, as it may be amended from
time to time (the "Information Statement"), or should contact the SNAP Program
directly, for information as to the procedures they should follow in order to
purchase shares of the Fund through the Program.

                                                      -7-



<PAGE>



     All Fund shares owned beneficially by participants in the SNAP Program are
owned of record by the Treasury Board, an agency of the Commonwealth of
Virginia, for the benefit of participants. Because the Treasury Board will be
the record owner of all shares of the Fund owned beneficially by SNAP Program
participants, a Program participant should follow the procedures described in
the Information Statement of the SNAP Program to ensure that all instructions as
to any investment by it in the Fund -- including instructions as to the purchase
or sale of shares of the Fund -- are timely carried out by the SNAP Program.

   
     Purchase orders; purchase price. The Fund offers its shares continuously at
a price of $1.00 per share. Shares of the Fund are sold at the net asset value
next determined after a purchase order is received by the Fund from the SNAP
Program. The Fund determines its net asset value each day the New York Stock
Exchange is open at 12:00 noon and as of the close of the Exchange. Purchase
orders that are received prior to 12:00 noon on a particular day are priced
according to the net asset value determined at that time, and the shares
purchased at that time will earn the dividend declared for that day. Purchase
orders that are received after 12:00 noon are priced based on the net asset
value determined as of the close of the Exchange on that day, and begin to earn
dividends on the next day.

    
     Because the Fund seeks to be fully invested at all times, investments must
be in Same Day Funds to be accepted. "Same Day Funds" are funds credited by the
applicable regional Federal Reserve Bank to the account of the Fund at Central
Fidelity National Bank. A participant in the SNAP Program wishing to invest in
the Fund must ensure that Central Fidelity National Bank, as Depository for the
SNAP Program, receives Same Day Funds at or prior to the time the participant
wishes to invest in the Fund. Consult the Information Statement or contact the
investment manager for the SNAP Program directly for information.

How to redeem shares

     Shares of the Fund may be redeemed on any day when the New York Stock
Exchange is open. Redemptions will be effected at the net asset value per share
of the Fund next determined after receipt of the redemption request in good
order. Shares redeemed at the Fund's 12:00 noon price do not earn the income
dividend declared on the day of redemption. Participants should consult the
Information Statement or contact the SNAP Program directly to ensure that all
necessary steps are taken to effect the timely redemption of their shares.

     Redemptions by check. SNAP Program participants may elect to have a special
checking account with Central Fidelity National Bank. Checks may be drawn on the
account for any amount. Upon receipt of a completed signature card, Central
Fidelity National Bank will provide the participant with a supply of checks
drawn on the account. Additional supplies of checks are available, upon request.
When a check is presented to Central Fidelity National Bank, a number of shares
in the Fund owned beneficially by the checkwriter will be redeemed in order to
pay the full amount of the check.

                                                      -8-



<PAGE>



     Redemption by check is not appropriate for a complete liquidation of an
account. If the amount of a redemption check is greater than the value of the
shares owned beneficially by the checkwriter, the check will be returned to the
depositor due to an insufficient account balance. The checkwriting privilege may
be suspended at any time. Consult the Information Statement or contact the SNAP
Program for additional information.

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

     The Fund will normally redeem shares for cash; however, the Fund reserves
the right to pay the redemption price wholly or partly in kind if the Trustees
determine it to be advisable in the interest of the remaining shareholders. If
portfolio securities are distributed in lieu of cash, the shareholder will
normally incur brokerage commissions upon subsequent disposition of any such
securities.

     If shares of the Fund to be redeemed represent an investment made by check,
the Fund reserves the right not to transmit the redemption proceeds to the
shareholder until the check has been collected which may take up to 15 days
after the purchase date.

Mentor Institutional Trust

     Mentor Institutional Trust is a Massachusetts business trust organized on
February 8, 1994. A copy of the Agreement and Declaration of Trust, which is
governed by Massachusetts law, is on file with the Secretary of State of The
Commonwealth of Massachusetts.
   
     The Trust is a series management investment company with an unlimited
number of authorized shares of beneficial interest. Shares of the Trust may,
without shareholder approval, be divided into two or more series of shares
representing separate investment portfolios. Any such series of shares may be
further divided without shareholder approval into two or more classes of shares
having such preferences and special or relative rights and privileges as the
Trustees determine. The Trust's shares are currently divided into five series,
one representing the Fund, the others representing other funds with varying
investment objectives and policies. Each share has one vote, with fractional
shares voting proportionally. Shares of each class will vote together as a
single class except when required by law or determined by the Trustees. Shares
of the Fund are freely transferable, are entitled to dividends as declared by
the Trustees, and, if the Fund were liquidated, would receive the net assets of
the Fund. The Trust may suspend the sale of shares at any time and may refuse
any order to purchase shares. Although the Trust is not required to hold annual
meetings of its shareholders, shareholders have the right to call a meeting to
elect or remove Trustees, or to take other actions as provided in the Agreement
and Declaration of Trust.
    
     In the interest of economy and convenience, the Fund will not issue
certificates for its shares except at the shareholder's request.

                                                      -9-



<PAGE>



Custodian and Transfer and Dividend Agent

     Central Fidelity National Bank serves as the Fund's custodian and transfer
and dividend agent. The address of Central Fidelity National Bank is 1021 East
Cary Street, P.O. Box 27602, Richmond, Virginia 23261.

Performance Information

     The Fund's "yield" is computed by determining the percentage net change,
excluding capital changes, in the value of an investment in one share of the
Fund over the base period, and multiplying the net change by 365/7 (or
approximately 52 weeks). The Fund's "effective yield" represents a compounding
of the yield by adding 1 to the number representing the percentage change in
value of the investment during the base period, raising that sum to a power
equal to 365/7, and subtracting 1 from the result.

   
     Past performance does not predict future results. Investment performance,
which will vary, is based on many factors, including market conditions, the
composition of the Fund's portfolio, and the Fund's operating expenses.
Investment performance also often reflects the risks associated with the Fund's
investment objective and policies. These factors should be considered when
comparing the Fund's investment results to those of other mutual funds and other
investment vehicles. The Fund's yield does not reflect any expenses incurred by
the SNAP Program, or by participants in the SNAP Program.
    
                                                      -10-



<PAGE>




SNAP Fund

Prospectus

An Open-End Management
Investment Company
   
November 1, 1996
    
                                                      -11-

                                    SNAP FUND

                       STATEMENT OF ADDITIONAL INFORMATION
   
                                November 1, 1996
    
   
         SNAP Fund (the "Fund") is a series of shares of beneficial interest of
Mentor Institutional Trust (the "Trust"), a series investment company. Prior to
July, 1995, the Fund was known as the Mentor Limited Duration Portfolio and had
no shares outstanding. This Statement of Additional Information is not a
prospectus and should be read in conjunction with the prospectus of the Fund
dated November 1, 1996. A copy of the prospectus can be obtained upon request
made to Mentor Investment Group, LLC ("Mentor") at P.O. Box 1357, Richmond,
Virginia 23286-0109, or by calling Mentor at 1-800-570-SNAP.
    
                                TABLE OF CONTENTS

         CAPTION                                          PAGE

INVESTMENT RESTRICTIONS......................................2
MANAGEMENT OF THE TRUST......................................4
PRINCIPAL HOLDERS OF SECURITIES..............................7
INVESTMENT ADVISORY AND OTHER SERVICES.......................7
BROKERAGE....................................................8
DETERMINATION OF NET ASSET VALUE............................10
TAX STATUS..................................................12
INDEPENDENT ACCOUNTANTS.....................................13
CUSTODIAN...................................................13
PERFORMANCE INFORMATION.....................................14
SHAREHOLDER LIABILITY.......................................14
OFFICERS OF COMMONWEALTH....................................14
RATINGS  ...................................................15
FINANCIAL STATEMENTS........................................17

                                                      -1-



<PAGE>



                             INVESTMENT RESTRICTIONS

         As fundamental investment restrictions, which may not be changed with
respect to the Fund without approval by the holders of a majority of the
outstanding shares of the Fund, the Fund may not:

         1.       Purchase any security (other than U.S. Government securities)
                  if as a result: (i) as to 75% of the Fund's total assets, more
                  than 5% of the Fund's total assets (taken at current value)
                  would then be invested in securities of a single issuer, or
                  (ii) more than 25% of the Fund's total assets would be
                  invested in a single industry, except that the Fund may invest
                  up to 100% of its assets in securities of issuers in the
                  banking industry.

         2.       Acquire more than 10% of the voting securities of any issuer.

         3.       Act as underwriter of securities of other issuers except to
                  the extent that, in connection with the disposition of
                  portfolio securities, it may be deemed to be an underwriter
                  under certain federal securities laws.

         4.       Issue any class of securities which is senior to the Fund's
                  shares of beneficial interest.

         5.       Purchase or sell securities on margin (but the Fund may obtain
                  such short-term credits as may be necessary for the clearance
                  of transactions). (Margin payments in connection with
                  transactions in futures contracts, options, and other
                  financial instruments are not considered to constitute the
                  purchase of securities on margin for this purpose.)

         6.       Purchase or sell real estate or interests in real estate,
                  including real estate mortgage loans, although it may purchase
                  and sell securities which are secured by real estate and
                  securities of companies that invest or deal in real estate or
                  real estate limited partnership interests. (For purposes of
                  this restriction, investments by the Fund in mortgage-backed
                  securities and other securities representing interests in
                  mortgage pools shall not constitute the purchase or sale of
                  real estate or interests in real estate or real estate
                  mortgage loans.)

         7.       Borrow money in excess of 5% of the value (taken at the lower
                  of cost or current value) of its total assets (not including
                  the amount borrowed) at the time the borrowing is made, and
                  then only from banks as a temporary measure to facilitate the
                  meeting of redemption requests (not for leverage) which might
                  otherwise require the untimely disposition of portfolio
                  investments or for extraordinary or emergency purposes.

                                                      -2-



<PAGE>



         8.       Pledge, hypothecate, mortgage, or otherwise encumber its
                  assets in excess of 15% of its total assets (taken at current
                  value) and then only to secure borrowings permitted by these
                  investment restrictions.

         9.       Purchase or sell commodities or commodity contracts, except
                  that the Fund may purchase or sell financial futures
                  contracts, options on futures contracts, and futures
                  contracts, forward contracts, and options with respect to
                  foreign currencies, and may enter into swap transactions.

         10.      Make loans, except by purchase of debt obligations or other
                  instruments in which the Fund may invest consistent with its
                  investment policies or by entering into repurchase agreements.

         In addition, it is contrary to the current policy of the Fund, which
policy may be changed without shareholder approval, to:

         1.       Invest in (a) securities which at the time of such investment
                  are not readily marketable, (b) securities restricted as to
                  resale, and (c) repurchase agreements maturing in more than
                  seven days, if, as a result, more than 10% of the Fund's net
                  assets (taken at current value) would then be invested in
                  securities described in (a), (b), and (c).

         2.       Invest in securities of other registered investment companies,
                  except by purchases in the open market involving only
                  customary brokerage commissions and as a result of which not
                  more than 5% of its total assets (taken at current value)
                  would be invested in such securities, or except as part of a
                  merger, consolidation, or other acquisition.

         All percentage limitations on investments will apply at the time of
investment and shall not be considered violated unless an excess or deficiency
occurs or exists immediately after and as a result of such investment. Except
for the investment restrictions listed above as fundamental or to the extent
designated as such in a prospectus with respect to the Fund, the other
investment policies described in this Statement or in a prospectus are not
fundamental and may be changed by approval of the Trustees. As a matter of
policy, the Trustees would not materially change the Fund's investment objective
without shareholder approval.

         The Investment Company Act of 1940, as amended (the "1940 Act"),
provides that a "vote of a majority of the outstanding voting securities" of the
Fund means the affirmative vote of the lesser of (1) more than 50% of the
outstanding shares of the Fund, and (2) 67% or more of the shares present at a
meeting if more than 50% of the outstanding shares are represented at the
meeting in person or by proxy.

                                                      -3-



<PAGE>




                             MANAGEMENT OF THE TRUST

         The following table provides biographical information with respect to
each Trustee and officer of the Trust. Each Trustee who is an "interested
person" of the Trust, as defined in the 1940 Act, is indicated by an asterisk.

<TABLE>
<CAPTION>
                                Position Held     Principal Occupation
Name and Address                with Fund         During Past 5 Years
- ----------------                ---------         -------------------
<S> <C>
Stanley F. Pauley               Trustee           Chairman and Chief Executive
                                                  Officer, E.R. Carpenter
                                                  Company Incorporated; Trustee,
                                                  The Mentor Funds; Trustee,
                                                  Cash Resource Trust.
   
Louis W. Moelchert, Jr.         Trustee           Vice President of Business and
                                                  Finance, University of
                                                  Richmond; Trustee, The Mentor
                                                  Funds and Cash Resource Trust;
                                                  Director, America's Utility
                                                  Fund, Inc.
    
Thomas F. Keller                Trustee           Dean, Fuqua School of
                                                  Business, Duke University;
                                                  Trustee, The Mentor Funds;
                                                  Trustee, Cash Resource Trust.

Arnold H. Dreyfuss              Trustee           Retired.  Formerly, Chairman
                                                  and Chief Executive Officer,
                                                  Hamilton Beach/Proctor-Silex,
                                                  Inc.; Trustee, The Mentor
                                                  Funds; Trustee, Cash Resource
                                                  Trust.
   
*Daniel J. Ludeman              Chairman;         Chairman and Chief Executive
                                Trustee           Officer since July 1991,
                                                  Mentor Investment Group, LLC;
                                                  Managing Director of Wheat,
                                                  First Securities, Inc. since
                                                  August 1989; Managing Director
                                                  of Wheat First Butcher Singer,
                                                  Inc. since June 1991;
                                                  Director, Wheat, First
                                                  Securities, Inc., Mentor
                                                  Income Fund, Inc. and
                                                  America's Utility Fund, Inc.;
                                                  Chairman and Trustee, Cash
                                                  Resource Trust.
    



                                                      -4-



<PAGE>



Troy A. Peery, Jr.              Trustee           President, Heilig-Meyers
                                                  Company. Trustee, The Mentor
                                                  Funds; Trustee, Cash Resource
                                                  Trust.
   
Paul F. Costello                President         Managing Director, Wheat First
                                                  Butcher Singer, Inc. and
                                                  Mentor Investment Group, LLC;
                                                  President, The Mentor Funds,
                                                  Mentor Income Fund, Inc., and
                                                  Cash Resource Trust; Director,
                                                  Mentor Investment Advisors, LLC;
                                                  Executive Vice President and Chief
                                                  Administrative Officer,
                                                  America's Utility Fund, Inc.;
                                                  Director, Mentor Perpetual
                                                  Advisors, LLC and Mentor Trust
                                                  Company; formerly, President,
                                                  Mentor Series Trust; Director,
                                                  President and Chief Executive
                                                  Officer, First Variable Life
                                                  Insurance Company; President
                                                  and Chief Financial Officer,
                                                  Variable Investors Series
                                                  Trust; President and
                                                  Treasurer, Atlantic Capital &
                                                  Research, Inc.; Vice President
                                                  and Treasurer, Variable Stock
                                                  Fund, Inc., Monarch Investment
                                                  Series Trust, and GEICO Tax
                                                  Advantage Series Trust; Vice
                                                  President, Monarch Life
                                                  Insurance Company, GEICO
                                                  Investment Services Company,
                                                  Inc., Monarch Investment
                                                  Services Company, Inc. and
                                                  Springfield Life Insurance
                                                  Company.

Terry L. Perkins                Treasurer         Senior Vice President, Mentor
                                                  Investment Group, LLC;
                                                  Treasurer, Cash Resource
                                                  Trust, Mentor Income Fund
                                                  Inc., The Mentor Funds, and
                                                  America's Utility Fund;
                                                  formerly, Treasurer and
                                                  Comptroller, Ryland Capital
                                                  Management, Inc.

                                                      -5-



<PAGE>




Michael Wade                    Assistant         Associate Vice President,
                                Treasurer         Mentor Investment Group, LLC
                                                  since April 1994; Assistant
                                                  Treasurer, Cash Resource
                                                  Trust, Mentor Income Fund,
                                                  Inc., The Mentor Funds, and
                                                  America's Utility Fund;
                                                  formerly, Senior Accountant,
                                                  Wheat First Butcher Singer,
                                                  Inc., April 1993 through March
                                                  1994; Audit Senior, BDO
                                                  Seidman, July 1989 through
                                                  March 1993.
    
John M. Ivan                    Clerk             Managing Director since
                                                  October 1992, Director of
                                                  Compliance since October 1992,
                                                  Senior Vice President from
                                                  1990 to October 1992, and
                                                  Assistant General Counsel
                                                  since 1985, Wheat, First
                                                  Securities, Inc.; Clerk, Cash
                                                  Resource Trust; Secretary, The
                                                  Mentor Funds.
</TABLE>
   
         The table below shows the fees paid to each Trustee by the Trust for
the current fiscal year and the fees paid to each Trustee by all funds in the
Mentor family (including the Trust) during the 1995 calendar year.

                                                         Total compensation
                               Aggregate compensation           from all
Trustees                            from the Trust           complex funds

Daniel J. Ludeman                      $    0                      --
Arnold H. Dreyfuss                        200                  17,200
Thomas F. Keller                          175                  14,700
Louis W. Moelchert, Jr.                   200                  16,700
Stanley F. Pauley                         200                  16,675
Troy A. Peery, Jr.                        175                  16,175
    
- -------------

         The Trustees do not receive pension or retirement benefits from the
Trust.

         The Agreement and Declaration of Trust of the Trust provides that the
Trust will indemnify its Trustees and officers against liabilities and expenses
incurred in connection with litigation in which they may be involved because of
their offices with the Trust, except if it is

                                                      -6-



<PAGE>



determined in the manner specified in the Agreement and Declaration of Trust
that they have not acted in good faith in the reasonable belief that their
actions were in the best interests of the Trust or that such indemnification
would relieve any officer or Trustee of any liability to the Trust or its
Shareholders by reason of willful misfeasance, bad faith, gross negligence, or
reckless disregard of his or her duties. The Trust, at its expense, provides
liability insurance for the benefit of its Trustees and officers.

                         PRINCIPAL HOLDERS OF SECURITIES
   
         As of September 30, 1996, the officers and Trustees of the Trust owned
as a group less than one percent of the outstanding shares of the Fund. To the
knowledge of the Fund, no person owns beneficially more than 5% of the
outstanding shares of the Fund as of that date, except as follows:

    
   
                        City of Chesapeake
                        P.O. Box 15245
                        Chesapeake, VA 23328-5245

                        Total Number of Shares: 155,033,021.05
                        Percentage of Ownership: 18.34%


                        Department of Treasury
                        Commonwealth of Virginia
                        P.O. Box 1879
                        Richmond, VA 23215-1879

                        Total Number of Shares: 53,672,254.80
                        Percentage of Ownership: 6.35%
    






                     INVESTMENT ADVISORY AND OTHER SERVICES
   
         Mentor Investment Advisors, LLC ("Mentor Advisors") acts as investment
adviser to the Fund pursuant to a Management Contract with the Trust. Subject to
the supervision and direction of the Trustees, Mentor Advisors, as investment
adviser, manages the Fund's portfolio in accordance with the stated policies of
the Fund and of the Trust. Mentor Advisors makes investment decisions for the
Fund and places the purchase and sale orders for portfolio transactions. Mentor
Advisors bears all expenses in connection with the performance of its services.
In addition, Mentor Advisors pays the salaries of all officers and employees who
are employed by it and the Trust.
    
   
         Mentor Advisors provides the Trust on behalf of the Fund with
investment officers who are authorized to execute purchases and sales of
securities. Investment decisions for the Fund and for the other investment
advisory clients of Mentor Advisors and its affiliates are made with a view to
achieving their respective investment objectives. Investment decisions are the
product of many factors in addition to basic suitability for the particular
client involved. Thus, a particular security may be bought or sold for certain
clients even though it could have been bought or sold for other clients at the
same time. Likewise, a particular security may be bought for one or more clients
when one or more other clients are selling the security. In some instances, one
client may sell a particular security to another client. It also sometimes
happens that two or more clients simultaneously purchase or sell the same
security, in which event each day's transactions in such security are, insofar
as possible, averaged as to price and allocated between such clients in a manner
which in Mentor Advisors' opinion is equitable to each and in accordance with
the amount being purchased or sold by each. There may be circumstances when
purchases or sales of portfolio securities for one or more clients will have an
adverse effect on other clients. In the case of short-term investments, the
Treasury area of Wheat First Butcher Singer handles purchases and sales under
guidelines approved by investment officers of the Trust. Mentor Advisors employs
professional staffs of portfolio managers who draw upon a variety of resources
for research information for the Fund.
    
                                                      -7-



<PAGE>



         The proceeds received by the Fund for each issue or sale of its shares,
and all income, earnings, profits, and proceeds thereof, subject only to the
rights of creditors, will be specifically allocated to the Fund, and constitute
the underlying assets of the Fund. The underlying assets of the Fund will be
segregated on the Trust's books of account, and will be charged with the
liabilities in respect of the Fund and with a share of the general liabilities
of the Trust. Expenses with respect to any two or more series of the Trust,
including the Fund, may be allocated in proportion to the net asset values of
the respective series except where allocations of direct expenses can otherwise
be fairly made.

         Expenses incurred in the operation of the Fund or otherwise allocated
to the Fund, including but not limited to taxes, interest, brokerage fees and
commissions, fees to Trustees who are not officers, directors, stockholders, or
employees of Wheat First Butcher Singer and subsidiaries, SEC fees and related
expenses, state Blue Sky qualification fees, charges of the custodian and
transfer and dividend disbursing agents, outside auditing, accounting, and legal
services, investor servicing fees and expenses, charges for the printing of
prospectuses and statements of additional information for regulatory purposes or
for distribution to shareholders, certain shareholder report charges and charges
relating to corporate matters are borne by the Fund.
   
         The Management Contract entered into by the Trust in respect of the
Fund is subject to annual approval commencing in 1997 by (i) the Trustees or
(ii) vote of a majority (as defined in the 1940 Act) of the outstanding voting
securities of the Fund, provided that in either event the continuance is also
approved by a majority of the Trustees who are not "interested persons" (as
defined in the 1940 Act) of the Trust or Mentor Advisors, by vote cast in person
at a meeting called for the purpose of voting on such approval. The Management
Contract is terminable without penalty, on not more than sixty days' notice and
not less than thirty days' notice, by the Trustees, by vote of the holders of a
majority of the Fund's shares, or by Mentor Advisors, as applicable.
    
   
         For the fiscal period ended June 30, 1996, the Fund paid Mentor
Advisors $667,271 pursuant to the Management Contract.
    
                                    BROKERAGE

         Transactions on U.S. stock exchanges, commodities markets, and futures
markets and other agency transactions involve the payment by the Fund of
negotiated brokerage commissions. Such commissions vary among different brokers.
A particular broker may charge different commissions according to such factors
as the difficulty and size of the transaction. Transactions in foreign
investments often involve the payment of fixed brokerage commissions, which may
be higher than those in the United States. There is generally no stated
commission in the case of securities traded in the over-the-counter markets, but
the price paid by the Fund usually includes an undisclosed dealer commission or
mark-up. In underwritten offerings, the price paid by the Fund includes a
disclosed, fixed commission or discount retained by the

                                                      -8-



<PAGE>



underwriter or dealer. It is anticipated that most purchases and sales of
securities by the Fund investing primarily in certain fixed-income securities
will be with the issuer or with underwriters of or dealers in those securities,
acting as principal. Accordingly, the Fund would not ordinarily pay significant
brokerage commissions with respect to securities transactions.
   
         It has for many years been a common practice in the investment advisory
business for advisers of investment companies and other institutional investors
to receive brokerage and research services (as defined in the Securities
Exchange Act of 1934, as amended (the "1934 Act")), from broker-dealers that
execute portfolio transactions for the clients of such advisers and from third
parties with which such broker-dealers have arrangements. Consistent with this
practice, Mentor Advisors receives brokerage and research services and other
similar services from many broker-dealers with which it places the Fund's
portfolio transactions and from third parties with which these broker-dealers
have arrangements. These services include such matters as general economic and
market reviews, industry and company reviews, evaluations of investments,
recommendations as to the purchase and sale of investments, newspapers,
magazines, pricing services, quotation services, news services and personal
computers utilized by Mentor Advisors managers and analysts. Where the
services referred to above are not used exclusively by Mentor Advisors for
research purposes, Mentor Advisors, based upon its own allocations of expected
use, bears that portion of the cost of these services which directly relates to
its non-research use. Some of these services are of value to Mentor Advisors and
its affiliates in advising various of its clients (including the Fund), although
not all of these services are necessarily useful and of value in managing the
Fund.
    
   
         Mentor Advisors places all orders for the purchase and sale of
portfolio investments for the Fund and buys and sells investments for the Fund
through a substantial number of brokers and dealers. Mentor Advisors seeks the
best overall terms available for the Fund, except to the extent Mentor Advisors
may be permitted to pay higher brokerage commissions as described below. In
doing so, Mentor Advisors, having in mind the Fund's best interests, considers
all factors it deems relevant, including, by way of illustration, price, the
size of the transaction, the nature of the market for the security or other
investment, the amount of the commission, the timing of the transaction taking
into account market prices and trends, the reputation, experience and financial
stability of the broker-dealer involved and the quality of service rendered by
the broker-dealer in other transactions.
    
   
         As permitted by Section 28(e) of the 1934 Act, and by the Management
Contract, Mentor Advisors may cause the Fund to pay a broker-dealer which
provides "brokerage and research services" (as defined in the 1934 Act) to
Mentor Advisors an amount of disclosed commission for effecting securities
transactions on stock exchanges and other transactions for the Fund on an agency
basis in excess of the commission which another broker-dealer would have charged
for effecting that transaction. Mentor Advisors' authority to cause the Fund to
pay any such greater commissions is also subject to such policies as the
Trustees may adopt from time to time. Mentor Advisors does not currently intend
to cause the Fund to make such payments. It is the position of the staff of the
Securities and Exchange Commission that Section 28(e) does not
    
                                                      -9-



<PAGE>


   
apply to the payment of such greater commissions in "principal" transactions.
Accordingly, Mentor Advisors will use its best efforts to obtain the best
overall terms available with respect to such transactions, as described above.
    
   
         Consistent with the Rules of Fair Practice of the National Association
of Securities Dealers, Inc. and subject to such other policies as the Trustees
may determine, Mentor Advisors may consider sales of shares of the Fund (and, if
permitted by law, of other Mentor funds) as a factor in the selection of
broker-dealers to execute portfolio transactions for the Fund.
    
                        DETERMINATION OF NET ASSET VALUE

         The Trust determines net asset value per share of the Fund twice each
day the New York Stock Exchange (the "Exchange") is open, once at 12:00 noon and
again at the close of regular trading on the New York Stock Exchange. Currently,
the Exchange is closed Saturdays, Sundays, and the following holidays: New
Year's Day, Presidents' Day, Good Friday, Memorial Day, the Fourth of July,
Labor Day, Thanksgiving, and Christmas.

         The valuation of the Fund's portfolio securities is based upon its
amortized cost, which does not take into account unrealized securities gains or
losses. This method involves initially valuing an instrument at its cost and
thereafter assuming a constant amortization to maturity of any discount or
premium, regardless of the impact of fluctuating interest rates on the market
value of the instrument. By using amortized cost valuation, the Fund seeks to
maintain a constant net asset value of $1.00 per share, despite minor shifts in
the market value of its portfolio securities. While this method provides
certainty in valuation, it may result in periods during which value, as
determined by amortized cost, is higher or lower than the price the Fund would
receive if it sold the instrument. During periods of declining interest rates,
the quoted yield on shares of the Fund may tend to be higher than a like
computation made by a fund with identical investments utilizing a method of
valuation based on market prices and estimates of market prices for all of its
portfolio instruments. Thus, if the use of amortized cost by the Fund resulted
in a lower aggregate portfolio value on a particular day, a prospective investor
in the Fund would be able to obtain a somewhat higher yield if he purchased
shares of the Fund on that day, than would result from investment in a fund
utilizing solely market values, and existing investors in the Fund would receive
less investment income. The converse would apply on a day when the use of
amortized cost by the Fund resulted in a higher aggregate portfolio value.
However, as a result of certain procedures adopted by the Trust, the Trust
believes any difference will normally be minimal.

         The valuation of the Fund's portfolio instruments at amortized cost is
permitted in accordance with Securities and Exchange Commission Rule 2a-7 and
certain procedures adopted by the Trustees. Under these procedures, the Fund
must maintain a dollar-weighted average portfolio maturity of 90 days or less,
purchase only instruments having remaining maturities of 397 days or less, and
invest in securities determined by the Trustees to be of high quality with
minimal credit risks. The Trustees have also established procedures designed to
stabilize, to the

                                                      -10-



<PAGE>



extent reasonably possible, the Fund's price per share as computed for the
purpose of distribution, redemption and repurchase at $1.00. These procedures
include review of the Fund's portfolio holdings by the Trustees, at such
intervals as they may deem appropriate, to determine whether the Fund's net
asset value calculated by using readily available market quotations deviates
from $1.00 per share, and, if so, whether such deviation may result in material
dilution or is otherwise unfair to existing shareholders. In the event the
Trustees determine that such a deviation may result in material dilution or is
otherwise unfair to existing shareholders, they will take such corrective action
as they regard as necessary and appropriate, including the sale of portfolio
instruments prior to maturity to realize capital gains or losses or to shorten
the average portfolio maturity; withholding dividends; redemption of shares in
kind; or establishing a net asset value per share by using readily available
market quotations.

         Since the net income of the Fund is declared as a dividend each time it
is determined, the net asset value per share of the Fund remains at $1.00 per
share immediately after such determination and dividend declaration. Any
increase in the value of a shareholder's investment in the Fund representing the
reinvestment of dividend income is reflected by an increase in the number of
shares of the Fund in the shareholder's account on the last day of each month
(or, if that day is not a business day, on the next business day). It is
expected that the Fund's net income will be positive each time it is determined.
However, if because of realized losses on sales of portfolio investments, a
sudden rise in interest rates, or for any other reason the net income of the
Fund determined at any time is a negative amount, the Fund will offset such
amount allocable to each then shareholder's account from dividends accrued
during the month with respect to such account. If at the time of payment of a
dividend by the Fund (either at the regular monthly dividend payment date, or,
in the case of a shareholder who is withdrawing all or substantially all of the
shares in an account, at the time of withdrawal), such negative amount exceeds a
shareholder's accrued dividends, the Fund will reduce the number of outstanding
shares by treating the shareholder as having contributed to the capital of the
Fund that number of full and fractional shares which represent the amount of the
excess. Each shareholder is deemed to have agreed to such contribution in these
circumstances by its investment in the Fund.

         Should the Fund incur or anticipate any unusual or unexpected
significant expense or loss which would affect disproportionately the Fund's
income for a particular period, the Trustees would at that time consider whether
to adhere to the dividend policy described above or to revise it in light of the
then prevailing circumstances in order to ameliorate to the extent possible the
disproportionate effect of such expense or loss on then existing shareholders.
Such expenses or losses may nevertheless result in a shareholder's receiving no
dividends for the period during which the shares are held and receiving upon
redemption a price per share lower than that which was paid.

                                                      -11-



<PAGE>



                                   TAX STATUS

         The Fund intends to qualify each year and elect to be taxed as a
regulated investment company under Subchapter M of the United States Internal
Revenue Code of 1986, as amended (the "Code").

         As a regulated investment company qualifying to have its tax liability
determined under Subchapter M, the Fund will not be subject to federal income
tax on any of its net investment income or net realized capital gains that are
distributed to shareholders. As a series of Massachusetts business trust, the
Fund will not under present law be subject to any excise or income taxes in
Massachusetts.

         In order to qualify as a "regulated investment company," the Fund must,
among other things, (a) derive at least 90% of its gross income from dividends,
interest, payments with respect to securities loans, gains from the sale or
other dispositions of stock, securities, or foreign currencies, and other income
(including but not limited to gains from options, futures, or forward contracts)
derived with respect to its business of investing in such stock, securities, or
currencies; (b) derive less than 30% of its gross income from the sale or other
disposition of certain assets (including stock and securities and certain
options, futures contracts, forward contracts, and foreign currencies) held less
than three months; (c) diversify its holdings so that, at the close of each
quarter of its taxable year, (i) at least 50% of the value of its total assets
consists of cash, cash items, U.S. Government securities, securities of other
regulated investment companies, and other securities limited generally with
respect to any one issuer to not more than 5% of the value of the total assets
of the Fund and not more than 10% of the outstanding voting securities of such
issuer, and (ii) not more than 25% of the value of its assets is invested in the
securities (other than U.S. Government securities or securities of other
regulated investment companies) of any issuer or two or more issuers which the
Fund controls and which are engaged in the same, similar, or related trades or
businesses. In order to receive the favorable tax treatment accorded regulated
investment companies and their shareholders, moreover, the Fund must in general
distribute at least 90% of its interest, dividends, net short-term capital gain,
and certain other income each year.

         An excise tax at the rate of 4% will be imposed on the excess, if any,
of the Fund's "required distribution" over its actual distributions in any
calendar year. Generally, the "required distribution" is 98% of the Fund's
ordinary income for the calendar year plus 98% of its capital gain net income
recognized during the one-year period ending on October 31 (or December 31, if
the Fund so elects) plus undistributed amounts from prior years. The Fund
intends to make distributions sufficient to avoid imposition of the excise tax.
Distributions declared by the Fund during October, November, or December to
shareholders of record on a date in any such month and paid by the Fund during
the following January will be treated for federal tax purposes as paid by the
Fund and received by shareholders on December 31 of the year in which declared.

                                                      -12-



<PAGE>



         The Fund is required to withhold 31% of all income dividends and
capital gain distributions, and 31% of the gross proceeds of all redemptions of
Fund shares, in the case of any shareholder who does not provide a correct
taxpayer identification number, about whom the Fund is notified that the
shareholder has under reported income in the past, or who fails to certify to
the Fund that the shareholder is not subject to such withholding. Tax-exempt
shareholders are not subject to these back-up withholding rules so long as they
furnish the Fund with a proper certification.

         As stated above, it is a policy of the Fund to meet the requirements of
the code to qualify as a regulated investment company that is taxed pursuant to
Subchapter M of the Code. One of these requirements is that less than 30% of the
Fund's gross income must be derived from gains from sale or other disposition of
securities held for less than three months. Accordingly, the Fund will be
restricted in selling securities held or considered under Code rules to have
been held less than three months.

         The foregoing is a general and abbreviated summary of the applicable
provisions of the Code and related regulations currently in effect. For the
complete provisions, reference should be made to the pertinent Code sections and
regulations. The Code and regulations are subject to change by legislative or
administrative actions. Dividends and distributions also may be subject to state
and federal taxes. Shareholders are urged to consult their tax advisers
regarding specific questions as to federal, state or local taxes. The foregoing
discussion relates solely to U.S. federal income tax law. Non-U.S. investors
should consult their tax advisers concerning the tax consequences of ownership
of shares of the Fund, including the possibility that distributions may be
subject to a 30% United States withholding tax (or a reduced rate of withholding
provided by treaty).

                             INDEPENDENT ACCOUNTANTS
   
         KPMG Peat Marwick LLP, located at 99 High Street, Boston, Massachusetts
02110, are the Trust's independent auditors, providing audit services, tax
return review, and other tax consulting services and assistance and consultation
in connection with the review of various Securities and Exchange Commission
filings. The audited financial statements incorporated by reference into or
included in the Fund's prospectus and Statement of Additional Information have
been so included and incorporated in reliance upon the report of KPMG Peat
Marwick LLP, the independent auditors, given on the authority of said firm as
experts in auditing and accounting.
    
                                    CUSTODIAN

         The custodian of the Fund, Central Fidelity National Bank, is located
at 1021 East Cary Street, P.O. Box 27602, Richmond, Virginia 23261. Its
responsibilities include generally safeguarding and controlling the Fund's cash
and securities, handling the receipt and delivery of securities, and collecting
interest and dividends on the Fund's investments.

                                                      -13-



<PAGE>



                             PERFORMANCE INFORMATION
   
         The yield of the Fund is computed by determining the percentage net
change, excluding capital changes, in the value of an investment in one share of
the Fund over the base period, and multiplying the net change by 365/7 (or
approximately 52 weeks). The Fund's effective yield represents a compounding of
the yield by adding 1 to the number representing the percentage change in value
of the investment during the base period, raising that sum to a power equal to
365/7, and subtracting 1 from the result. Based on the seven-day period ended
June 30, 1996, the Fund's yield was 5.30% and its effective yield was 5.44%.
    
         All data for the Fund is based on past performance and does not predict
future results.

                              SHAREHOLDER LIABILITY

         Under Massachusetts law, shareholders could, under certain
circumstances, be held personally liable for the obligations of the Trust.
However, the Agreement and Declaration of Trust disclaims shareholder liability
for acts or obligations of the Trust and requires that notice of such disclaimer
be given in each agreement, obligation, or instrument entered into or executed
by the Trust or the Trustees. The Agreement and Declaration of Trust provides
for indemnification out of the Fund's property for all loss and expense of any
shareholder held personally liable for the obligations of the Fund. Thus the
risk of a shareholder's incurring financial loss on account of shareholder
liability is limited to circumstances in which the Fund would be unable to meet
its obligations.

                            OFFICERS OF COMMONWEALTH

R. Preston Nuttall, CFA     Managing Director, Director of Cash Management and
                            Portfolio Manager

Mr. Nuttall has more than thirty years of investment management experience.
Prior to Commonwealth, he led short-term fixed-income management for fifteen
years at Capitoline Investment Services, Inc. He has his undergraduate degree in
economics from the University of Richmond and his graduate degree in finance
from the Wharton School at the University of Pennsylvania.

Hubert R. White III         Vice President, Portfolio Manager
   
Mr. White has twelve years of investment management experience. Prior to joining
Commonwealth, he served for five years as portfolio manager with Capitoline
Investment Services. He has his undergraduate degree in business from the
University of Richmond.
    
                                                      -14-



<PAGE>



Kathryn T. Allen            Vice President, Portfolio Manager
   
Ms. Allen has fifteen years of investment management experience and specializes
in tax-free trades.  Prior to joining Commonwealth, Ms. Allen was portfolio
group manager at PNC Institutional Management Corporation.  She has her
undergraduate degree in commerce and business administration from the University
of Alabama.
    
                                     RATINGS

A-1 and Prime-1 Commercial Paper Ratings

The rating A-1 (including A-1+) is the highest commercial paper rating assigned
by S&P. Commercial paper rated A-1 by S&P has the following characteristics:

         o         liquidity ratios are adequate to meet cash requirements;

         o         long-term senior debt is rated "A" or better;

         o         the issuer has access to at least two additional channels of
                   borrowing;

         o         basic earnings and cash flow have an upward trend with
                   allowance made for unusual circumstances;

         o         typically, the issuer's industry is well established and the
                   issuer has a strong position within the industry; and

         o         the reliability and quality of management are unquestioned.

Relative strength or weakness of the above factors determines whether the
issuer's commercial paper is rated A-1, A-2 or A-3. Issues rated A-1 that are
determined by S&P to have overwhelming safety characteristics are designated
A-1+.

The rating Prime-1 is the highest commercial paper rating assigned by Moody's.
Among the factors considered by Moody's in assigning ratings are the following:

         o         evaluation of the management of the issuer;

         o         economic evaluation of the issuer's industry or industries
                   and an appraisal of speculative-type risks which may be
                   inherent in certain areas;

         o         evaluation of the issuer's products in relation to
                   competition and customer acceptance;

                                                      -15-



<PAGE>



         o         liquidity;

         o         amount and quality of long-term debt;

         o         trend of earnings over a period of ten years;

         o         financial strength of parent company and the relationships
                   which exist with the issuer; and

         o         recognition by the management of obligations which may be
                   present or may arise as a result of public interest questions
                   and preparations to meet such obligations.

                                                      -16-



<PAGE>


   
                              FINANCIAL STATEMENTS
    


                                                      -17-



<PAGE>


SNAP Fund
Portfolio of Investments
June 30, 1996

<TABLE>
<CAPTION>

                                                 Percent of           Principal         Value
                                                 Net Assets            Amount          (Note 2)
<S> <C>
Bankers Acceptances                                   19.04%
  Bank of Montreal
       5.30%, 7/5/96                                                   $16,000,000     $15,990,578
       5.29%, 7/15/96                                                   10,000,000       9,979,428
  Chase Manhattan Bank
       5.30%, 7/3/96 - 8/14/96                                           8,516,757       8,501,264
       5.36%, 8/13/96                                                    5,828,023       5,790,711
       5.21%, 8/26/96                                                    8,000,000       7,935,165
       5.36%, 8/29/96                                                    5,219,372       5,173,523
       5.31%, 9/25/96                                                    4,042,500       3,991,221
  Citibank, 5.28%, 7/1/96                                                8,050,000       8,050,000
  Corestates Bank
       5.35%, 7/22/96                                                    2,000,000       1,993,758
       5.23%, 8/23/96                                                    5,000,000       4,961,502
       5.20%, 9/11/96                                                    5,000,000       4,948,000
       5.29%, 9/25/96                                                    5,000,000       4,936,814
       5.32%, 10/21/96 - 10/25/96                                       15,000,000      14,745,822
  First National Bank of Chicago, 5.06%, 7/29/96                         5,000,000       4,980,322
  First Union Bank, 5.30%, 8/28/96                                      11,500,000      11,401,803
  Mellon Bank
       5.20%, 7/3/96                                                     3,000,000       2,999,133
       5.37%, 8/2/96                                                    12,200,000      12,141,765
       5.47%, 11/1/96 - 11/25/96                                        16,500,000      16,146,045
  Nationsbank Corporation
       4.90%, 7/10/96                                                    6,000,000       5,992,650
       5.31%, 7/30/96 - 11/15/96                                        19,625,000      19,292,148
       5.26%, 9/11/96                                                   10,000,000       9,894,800
       5.33%, 10/7/96                                                    2,000,000       1,970,981
- ---------------------------------------------------------------------------------------------------
Total Bankers Acceptances                                                              181,817,433
- ---------------------------------------------------------------------------------------------------


Commercial Paper                                      35.08%
  American Express, 5.28%, 8/15/96                                         700,000         695,380
  AT&T, 5.28%, 8/15/96                                                     700,000         695,380
  Bear Sterns Companies, Inc., 5.35%, 7/15/96                           26,000,000      25,945,906
  CS First Boston Group, 5.29%, 7/24/96                                 40,000,000      39,864,811
  Ford Motor Credit, 5.32%, 7/8/96                                      20,000,000      19,979,311
  General Electric
       5.24%, 8/30/96                                                   20,000,000      19,825,333
       5.30%, 11/29/96                                                     345,000         337,330
       5.36%, 1/15/97                                                   20,000,000      19,410,400
  Greenwich Funding Group (a)
       5.34%, 7/1/96                                                    20,000,000      20,000,000
       5.40%, 7/15/96                                                   20,000,000      19,958,000

<PAGE>

SNAP Fund
Portfolio of Investments
June 30, 1996

<CAPTION>

                                                 Percent of           Principal         Value
                                                 Net Assets            Amount          (Note 2)
<S> <C>


Commercial Paper (continued)
  Internationale Nederland
       5.28%, 7/1/96                                                    $7,600,000      $7,600,000
       5.41%, 9/17/96                                                    9,500,000       9,388,644
       5.42%, 9/19/96                                                   17,000,000      16,795,244
  Merrill Lynch
       5.33%, 8/5/96 - 8/15/96                                          20,700,000      20,591,697
       5.28%, 11/15/96                                                  10,000,000       9,799,067
  Morgan Stanley Group Inc.
       5.33%, 7/12/96                                                   10,000,000       9,983,714
       5.27%, 7/30/96                                                   30,000,000      29,872,642
  National Rural Utilities, 5.30%, 7/2/96                               20,000,000      19,997,056
  Rincon Securities, Inc.
       5.30%, 7/29/96                                                   15,000,000      14,938,167
       5.31%, 7/30/96                                                   12,000,000      11,948,670
       5.38%, 8/29/96                                                    7,000,000       6,938,279
  Societe Generale, 5.38%, 2/7/97                                       10,000,000       9,670,035
  Walt Disney Company, 5.29%, 8/15/96                                      700,000         695,371
- ---------------------------------------------------------------------------------------------------
Total Commercial Paper                                                                 334,930,437
- ---------------------------------------------------------------------------------------------------

Corporate Notes                                       24.92%
  Bank of America, 5.45%, 9/24/96                                       30,000,000      30,000,000
  Fifth Third Bank
       5.39%, 8/16/96                                                   16,000,000      16,000,000
       5.38%, 10/21/96                                                  29,000,000      28,988,873
  First of America, 4.98%, 12/19/96                                     35,000,000      34,905,664
  First Union Bank, 5.37%, 8/1/96                                       28,000,000      28,000,000
  National Bank of Detroit, 5.01%, 7/15/96                              20,000,000      20,000,000
  State Street Bank & Trust, 5.31%, 7/8/96                              40,000,000      40,000,000
  Wachovia Bank
       5.31%, 7/3/96                                                    20,000,000      20,000,000
       5.34%, 7/19/96 - 7/24/96                                         20,000,000      20,000,000
- ---------------------------------------------------------------------------------------------------
Total Corporate Notes                                                                  237,894,537
- ---------------------------------------------------------------------------------------------------

U.S. Government Securities and Agencies               12.76%
  Federal Home Loan Bank
       5.01%, 7/24/96                                                    8,730,000       8,702,057
       5.30%, 7/29/96                                                   30,000,000      29,876,333
  Student Loan Marketing Association (b)
       5.39%, 8/9/96 - 9/23/96                                          30,000,000      29,998,746
       5.49%, 8/4/97                                                    13,000,000      12,997,337
       5.41%, 11/24/97                                                  15,000,000      15,000,000
       5.45%, 1/13/99                                                    5,000,000       5,000,000

<PAGE>

SNAP Fund
Portfolio of Investments
June 30, 1996


<CAPTION>
                                                 Percent of           Principal         Value
                                                 Net Assets            Amount          (Note 2)
<S> <C>

U.S. Government Securities and Agencies (continued)
  U.S. Treasury Note, 7.50%, 1/31/97                                   $20,000,000     $20,266,334
- ---------------------------------------------------------------------------------------------------
Total U.S. Government Securities and Agencies                                          121,840,807
- ---------------------------------------------------------------------------------------------------

Repurchase Agreement                                   7.91%
  Goldman, Sachs & Company
  Dated 6/28/96, 5.55%, Due 7/1/96; collateralized by
  $78,234,891 Federal National Mortgage Association,
  7.50%, 3/1/26                                                         75,543,985      75,543,985
- ---------------------------------------------------------------------------------------------------

Total Investments (cost $952,027,199)                 99.71%                           952,027,199
- ---------------------------------------------------------------------------------------------------

Other Assets less Liabilities                          0.29%                             2,750,214
- ---------------------------------------------------------------------------------------------------

Net Assets                                           100.00%                          $954,777,413
- ---------------------------------------------------------------------------------------------------

</TABLE>

Most bankers acceptances and commercial paper are traded at a discount. In such
cases the rate shown represents the discount received at the time of purchase by
the Fund.

(a) These are securities that may be resold to "qualified institutional buyers"
    under Rule 144A or securities offered pursuant to section 4 (2) of the
    Securities Act of 1933, as amended. These securities have been determined
    to be liquid under guidelines that have been established by the Board of
    Trustees.

(b) Floating Rate Securities- The rates shown are the effective rates at June
    30, 1996.

See notes to financial statements.

<PAGE>

   
SNAP Fund
Period Ended June 30, 1996*
    

   
SNAP Fund
Statement of Assets and Liabilities
June 30, 1996

Assets
Investments, at amortized cost (Note 2)
   Investment securities                                        $876,483,214
   Repurchase agreement                                           75,543,985
 ----------------------------------------------------------------------------
    Total investments                                            952,027,199
Interest receivable                                                2,715,545
Organizational expenses (Note 2)                                     403,523
- ----------------------------------------------------------------------------
    Total assets                                                 955,146,267
- ----------------------------------------------------------------------------

Liabilities
Accrued expenses                                                     368,854
- ----------------------------------------------------------------------------
  Total liabilities                                                  368,854
- ----------------------------------------------------------------------------
Net Assets                                                      $954,777,413
- ----------------------------------------------------------------------------
Shares outstanding                                               954,777,413
Net asset value per share                                       $       1.00
- ----------------------------------------------------------------------------
See notes to financial statements.
    

<PAGE>

   
    

Statement of Operations

Investment Income
     Interest income                           $44,059,888
- ------------------------------------------------------------

Expenses
     Advisory fees (Note 3)                        667,271
     Custodian fees                                144,858
     Amortization of organizational expenses
      (Note 2)                                      70,395
     Legal fees                                     29,704
     Audit fees                                      9,370
     Other                                           9,484
- ------------------------------------------------------------
         Total expenses                            931,082
- ------------------------------------------------------------
Net investment income                           43,128,806
- ------------------------------------------------------------

Net increase in net assets resulting from
  operations                                   $43,128,806
- ------------------------------------------------------------



Statement of Changes in Net Assets

Increase in Net Assets
Operations
     Net investment income                     $43,128,806
- ------------------------------------------------------------
       Increase in net assets from operations   43,128,806
- ------------------------------------------------------------

Distributions to Shareholders from net
  investment income                            (43,128,806)
- ------------------------------------------------------------

Capital Share Transactions (at $1.00 per
  share)
     Net proceeds from sale of shares        1,356,378,229
     Reinvestment of dividends                  43,128,806
     Cost of shares redeemed                (1,073,065,307)
- ------------------------------------------------------------
          Change in net assets from capital
            share transactions                 326,441,728
- ------------------------------------------------------------
Net increase in net assets                     326,441,728

Net Assets
     Beginning of period (Note 1)              628,335,685
- ------------------------------------------------------------
     End of period                            $954,777,413
- ------------------------------------------------------------

*For the period from July 24, 1995 (commencement of operations as a registrant
 under the Investment Company Act of 1940) to June 30, 1996.

See notes to financial statements.

<PAGE>

SNAP Fund
Financial Highlights


                                        Period
                                        Ended**
                                       06/30/96
Per Share Operating Performance

Net asset value, beginning of period      $1.00
Income from investment operations
Net investment income                      0.05 *
Net realized gain on investments             -
- ----------------------------------------------------
     Total from investment operations      0.05

Distributions from net investment income  (0.05)*
- ----------------------------------------------------

Net asset value, end of period            $1.00
- ----------------------------------------------------

Total Return                               5.29%
- ----------------------------------------------------

Ratios / Supplemental Data
- ----------------------------------------------------

Net assets, end of period (in thousands) $954,777

Ratio of expenses to average net assets    0.12%(a)

Ratio of net investment income to average
     net assets                            5.53%(a)
- ----------------------------------------------------

(a) Annualized.

   
 *Includes net realized capital gains which were under $0.01 per share.
    

**For the period from July 24, 1995 (commencement of operations as a registrant
  under the Investment Company Act of 1940) to June 30, 1996.

See notes to financial statements.

<PAGE>

SNAP Fund
Notes to Financial Statements
June 30, 1996

   
Note 1: Organization
SNAP Fund (the "Fund") is an open-end management investment company registered
under the Investment Company Act of 1940, as amended.  The Fund is a series of
shares of beneficial interest of Mentor Institutional Trust, a Massachusetts
business trust. Prior to July 24, 1995, the Fund was known as the Mentor Limited
Duration Portfolio and had no shares outstanding. On July 24, 1995, net
assets of the Virginia State Non-Arbitrage Program (SNAP) in the amount of
$628,335,685 were exchanged for shares of the Fund.
    

Note 2: Significant Accounting Policies
The following is a summary of significant accounting policies consistently
followed by the Fund in the preparation of its financial statements.  The
policies are in conformity with generally accepted accounting principles which
require management to make estimates and assumptions that affect amounts
reported therein.  Although actual results could differ from these estimates,
any such differences are expected to be immaterial to the net assets of the
Fund.

A. Valuation of Securities
Investments are stated at amortized cost, which approximates market value.  In
the event that a deviation of 1/2 of 1% or more exists between the Fund's $1.00
per share net asset value, calculated at amortized cost, and the net asset value
calculated by reference to market-based values, or if there is any other
deviation that the Board of Trustees believes would result in a material
dilution to shareholders or purchasers, the Board of Trustees will promptly
consider what action should be initiated.

B. Repurchase Agreements
It is the policy of the Fund to require the custodian bank to take possession,
to have legally segregated in the Federal Reserve Book entry system, or to have
segregated within the custodian bank's possession all securities held as
collateral in support of repurchase agreement investments.  Additionally,
procedures have been established by the Trust to monitor, on a daily basis, the
market value of each repurchase agreement's underlying securities to ensure the
existence of a proper level of collateral.

The Fund will enter into repurchase agreements with banks and other recognized
financial institutions, such as broker/dealers which are deemed by the Fund's
investment adviser to be credit-worthy, only pursuant to guidelines established
by the Board of Trustees.  Risks may arise from the potential inability of
counterparties to honor the terms of the repurchase agreement.  Accordingly, the
Fund could receive less than the repurchase price on the sale of collateral
securities.

C. Investment Transactions
Investment transactions are accounted for on trade date and the cost of
investments sold is determined by use of the specific identification method.

<PAGE>

SNAP Fund
Notes to Financial Statements (continued)

D. Interest Income and Expenses
Interest income is recorded on the accrual basis and includes amortization of
premiums and discounts on investments.  Expenses arising in connection with the
operation of the Fund are recorded on the accrual basis and paid from the income
of the Fund.

E. Organizational Expenses
Organizational expenses are related to costs incurred in connection with the
registration of the Fund as a management investment company.  Such expenses are
being amortized on a straight-line basis over 60 months.

F. Distributions to Shareholders
Dividends, equal to the net investment income plus or minus any net realized
gains or losses, are declared daily and paid monthly.

G. Federal Income Taxes
No provision for federal income taxes has been made as it is the Fund's policy
to comply with the provisions applicable to regulated investment companies under
the Internal Revenue Code and to distribute to its shareholders within the
allowable time limit substantially all taxable income and realized capital
gains.

Note 3: Investment Management Fees

The Fund has entered into an Investment Management and Advisory Agreement with
Commonwealth Investment Counsel, Inc. ("Commonwealth") to provide investment
advisory services to the Fund.  The Fund pays advisory fees to Commonwealth
monthly at the following annual rates expressed as percentage of the average
daily net assets of the Fund:

       Average Daily Net Assets                            Rate
   ---------------------------------                 ------------------
   First           $500 million                             0.09%
   Next            $250 million                             0.08%
   Next            $250 million                             0.07%
   Next            $250 million                             0.06%
   Over            $1.25 billion                            0.05%

Note 4: Investments
In accordance with Statement No. 3 of the Governmental Accounting Standards
Board, credit risk is the risk that an Investor may not be able to obtain
possession of its investment instrument or collateral at maturity. Risk category
1 includes investments that are insured or registered or for which the
securities are held by the Investor or its agent in the Investor's name.  Risk
category 2 includes uninsured or unregistered investments for which the
securities are held by the broker's or dealer's trust department or agent in the
Investor's name. Risk category 3 includes uninsured or unregistered investments
for which the securities are held by the broker or dealer, or by its trust
department or agent but not in the Investor's name.  All investments held at
June 30, 1996 are in risk category 1.

Note 5: Capital Share Information
Net assets consist entirely of paid-in-capital applicable to 954,777,413 no par
value shares of beneficial interest outstanding.  An unlimited number of shares
have been authorized for issuance.



<PAGE>

Independent Auditors' Report
The Board of Trustees
Mentor Institutional Trust

   
We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments of SNAP Fund, a portfolio of Mentor Institutional
Trust, as of June 30, 1996, and the related statement of operations, statement
of changes in net assets and financial highlights for the period from July 24,
1995 (commencement of operations as a registrant under the Investment Company
Act of 1940) to June 30, 1996. These financial statements and financial
highlights are the responsibility of the Fund's management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audit.
    

We conducted our audit 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 and financial highlights are
free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of securities owned as of June 30, 1996 by
correspondence with the custodian. 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
audit provides a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of SNAP
Fund, a portfolio of Mentor Institutional Trust, as of June 30, 1996, and the
results of its operations, changes in its net assets and financial highlights
for the period from July 24, 1995 to June 30, 1996, in conformity with generally
accepted accounting principles.




Boston, Massachusetts
August 2, 1996


   
PART C.  OTHER INFORMATION
    
   
Item 24. Financial Statements and Exhibits
    
(a)               Financial Statement and Supporting Schedules
   
         (1)      SNAP Fund
    
                  Statement of Assets and Liabilities -- June 30, 1996.*
                  Statement of Operations -- period ended June 30, 1996.*
                  Statement of Changes in Net Assets -- period ended June 30,
                  1996.*
                  Financial Highlights.**
                  Notes to Financial Statements.*
                  Portfolio of Investments -- June 30, 1996.*
                  Independent Auditors' Report*
   
- --------------
* Included in Part B.
** Included in Parts A and B.
    

(b)      Exhibits

         (1)
         (A)    -   Agreement and Declaration of Trust.(1)
         (B)    -   Amendment to Agreement and Declaration of Trust.(4)

     (2)            -      Bylaws.(1)
     (3)            -      Inapplicable.
     (4)

         (A)    -   Form of certificate representing shares of beneficial
                    interest for each of the Portfolios.(1)
         (B)    -   Portions of Agreement and Declaration of Trust Relating to
                    Shareholders' Rights.(1)
         (C)    -   Portions of Bylaws Relating to Shareholders' Rights.(1)

     (5)

         (A)    -   Form of Management Contract (Mentor Intermediate Duration
                    and Mentor Fixed-Income Portfolios).(1)
         (B)    -   Form of Management Contract (SNAP Fund).(5)
         (C)    -   Form of Management Contract (Mentor International
                    Portfolio)(8)

     (6) (A)    -   Form of Distribution Agreement.(2)
     (6) (B)    -   Form of Assignment of Distribution Agreement.(5)
     (7)        -   Inapplicable.
     (8)

         (A)    -   Form of Custody Agreement.(1)
         (B)    -   Form of Custody Agreement (SNAP Fund).(5)
         (C)    -   Form of Transfer Agency and Services Agreement.(3)
         (D)    -   Form of Transfer Agency and Services Agreement (SNAP
                    Fund).(5)

                                                      -1-



<PAGE>



     (9) (A)    -   Form of Administration Agreement.(1)
         (B)    -   Form of Shareholder Services Plan.(9)
     (10)       -   Opinion of counsel, including consent.(3)
     (11)       -   Consent of Independent Accountants.(10)
     (12)       -   Inapplicable.
     (13)       -   Inapplicable.
     (14)       -   Inapplicable.
     (15)       -   Form of Plan of Distribution Pursuant to Rule 12b-1.(9)
     (16)       -   Schedule of Computation of Performance Information (10)
     (17)       -   Financial Data Schedule -- Mentor Cash Management
                    Portfolio(8)
                    Financial Data Schedule -- Mentor Intermediate Duration
                    Portfolio (8)
                    Financial Data Schedule -- Mentor Fixed Income Portfolio (8)
                    Financial Data Schedule -- SNAP Fund (10)
     (18)       -   Form of Rule 18f-3 Plan(9)


   (1)   Incorporated herein by reference to the Registrant's initial
         Registration Statement on Form N-1A under the investment Company Act of
         1940 filed on April 15, 1994.

   (2)   Incorporated herein by reference to Registrant's initial Registration
         Statement on Form N-1A under the Securities Act of 1933 on Form N-1A
         filed on June 28,1994.

   (3)   Incorporated herein by reference to Pre-Effective Amendment No. 2 to
         the Registrants' Registration Statement on Form N-1A filed on November
         18, 1994.

   (4)   Incorporated herein by reference to Post-Effective Amendment No. 1 to
         the Registrants' Registration Statement on Form N-1A filed on July 3,
         1995.

   (5)   Incorporated herein by reference to Post-Effective Amendment No. 2 to
         the Registrants' Registration Statement on Form N-1A filed on July 24,
         1995.

   (6)   Incorporated herein by reference to Post-Effective Amendment No. 3 to
         the Registrants' Registration Statement on Form N-1A filed on September
         5, 1995.

   (7)   Incorporated herein by reference to Post-Effective Amendment No. 5 to
         the Registrants' Registration Statement on Form N-1A filed on March 11,
         1994.

   (8)   Incorporated herein by reference to Post-Effective Amendment No. 6 to
         the Registrants' Registration Statement on Form N-1A filed on May 21,
         1996.

   (9)   Incorporated herein by reference to Post-Effective Amendment No. 7 to
         the Registrant's Registration Statement on Form N-1A filed on July 3,
         1996.

   (10)  Filed herewith.

                                                      -2-



<PAGE>



   
Item 25. Persons Controlled by or Under Common Control with Registrant
    
            None.
   
Item 26. Number of Record Holders of Securities
    
   
            As of September 30, 1996, there was one holder of record of shares
of beneficial interest of the SNAP Fund.
    
   
Item 27.  Indemnification
    
         The information required by this item is incorporated herein by
reference from the Registrant's initial Registration Statement on Form N-1A
under the Investment Company Act of 1940 (File No. 811-8484).
   
Item 28. Business and Other Connections of Investment Adviser
    
   
         (a) Mentor Investment Advisors, LLC serves as the investment adviser to
nineteen separate investment portfolios in the Mentor Family of Funds.
    
   
         The following is additional information with respect to the directors
and officers of Mentor Investment Advisors, LLC:
    
<TABLE>
<CAPTION>
   
                                                         Other Substantial
                                                       Business, Profession,
                                                      Vocation or Employment
                               Position with               during the past
         Name                Investment Adviser           two fiscal years
<S> <C>
John G. Davenport            Director                    None


R. Preston Nuttall           Director                    Formerly, Senior Vice
                                                         President, Capitoline
                                                         Investment Services,
                                                         919 East Main Street,
                                                         Richmond, VA 23219

Paul F. Costello             Director                    Managing Director, Wheat First
                                                         Butcher Singer, Inc. and
                                                         Mentor Investment Group, LLC;
                                                         President, The Mentor Funds,
                                                         Mentor Income Fund, Inc., and
                                                         Cash Resource Trust; Executive
                                                         Vice President and Chief
                                                         Administrative Officer,
                                                         America's Utility Fund, Inc.;
                                                         Director, Mentor Perpetual
                                                         Advisors, LLC and Mentor Trust
                                                         Company

Theodore W. Price            Director                    Formerly, President, Charter
                                                         Asset Management, Inc.

P. Michael Jones             Director                    Formerly, Managing Director,
                                                         Commonwealth Investment Counsel, Inc.


                                                      -3-



<PAGE>


Thomas L. Souders            Treasurer                   Managing Director and
                                                         Chief Financial
                                                         Officer, Wheat, First
                                                         Securities, Inc.;
                                                         formerly, Manager of
                                                         Internal Audit,
                                                         Heilig-Myers; formerly,
                                                         Manager, Peat Marwick &
                                                         Mitchell & Company

Robert P. Wilson             Assistant Treasurer         Assistant Treasurer,
                                                         Mentor Distributors,
                                                         Inc. and Commonwealth
                                                         Advisors

John M. Ivan                 Secretary                   Managing Director,
                                                         Senior Vice President
                                                         and Assistant General
                                                         Counsel, Wheat, First
                                                         Securities, Inc.;
                                                         Managing Director and
                                                         Assistant Secretary,
                                                         Wheat First Butcher
                                                         Singer, Inc.; Clerk,
                                                         Cash Resource Trust;
                                                         Secretary, The Mentor
                                                         Funds


Howard T. Macrae, Jr.        Assistant Secretary         Assistant Secretary,
                                                         Mentor Investment
                                                         Advisors, LLC and
                                                         Mentor Distributors,
                                                         LLC

    

   
Item 29. Principal Underwriters
    
                                                      -4-



<PAGE>


   
         (a) Mentor Distributors, LLC currently is acting as principal
underwriter for The Mentor Funds and Cash Resource Trust.
    
   
         (b)  The following is information concerning officers and directors of
Mentor Distributors, LLC
    

   
Name and Principal       Position and Offices        Positions and Offices
Business Address         with Underwriters           with Registrant

Peter J. Quinn, Jr.         President and                     --
901 East Byrd Street        Director, Mentor
Richmond, VA  23219         Distributors, LLC

Paul F. Costello            Senior Vice President,        President
901 East Byrd Street        Mentor Distributors,
Richmond, VA  23219         LLC

Thomas Lee Souders          Treasurer, Mentor                 --
901 East Byrd Street        Distributors, LLC
Richmond, VA  23219

John Mark Harris            Secretary, Mentor                  --
901 East Byrd Street        Distributors, LLC
Richmond, VA  23219

John Michael Ivan           Assistant Secretary,          Secretary
901 East Byrd Street        Mentor Distributors,
Richmond, VA  23219         LLC
    
   
         (c)  Registrant has no principal underwriter who is not an affiliate of
the Registrant.
    
   
Item 30.          Location of Accounts and Records
    
                  Persons maintaining physical possession of accounts, books and
other documents required to be maintained by Section 31(a) of the Investment
Company Act of 1940 and the Rules promulgated thereunder are Registrant's
Secretary, John M. Ivan, Registrant's custodians, Investors Fiduciary Trust
Company ("IFTC") (all Portfolios other than SNAP Fund), and Central Fidelity
National Bank (SNAP Fund only), and Registrant's transfer agents, State Street
Bank and Trust Company (through Boston Financial Data Services, Inc. ("BFDS"))
(all Portfolios other than SNAP Fund), and Central Fidelity National Bank (SNAP
Fund only). The address of the Secretary is 901 East Byrd Street, Richmond,
Virginia, 23219. The address of BFDS is 2 Heritage Drive, North Quincy,
Massachusetts 02171. The

                                                      -5-



<PAGE>



address of IFTC is 127 West 10th Street, Kansas City, Missouri, 64105.  The
address of Central Fidelity National Bank is 1021 East Cary Street, P.O. Box
27602, Richmond, Virginia 23261.

   
Item 31.          Management Services
    
                  None.
   
Item 32.          Undertakings
    
(a)      The Registrant undertakes to furnish to each person to whom a
         prospectus of the Registrant is delivered a copy of the Registrant's
         latest annual report to shareholders, upon request and without charge.

(b)      Inapplicable.

(c)      Inapplicable.

(d)      The undersigned Registrant hereby undertakes to call a meeting of
         shareholders for the purpose of voting on the removal of a trustee or
         trustees when requested in writing to do so by the holders of at least
         10% of the Registrant's outstanding voting securities and in connection
         with such meeting to comply with the provisions of Section 16(c) of the
         Investment Company Act of 1940 relating to shareholder communications.

                                                      -6-



<PAGE>



                                     NOTICE

                  A copy of the Agreement and Declaration of Trust of Mentor
Institutional Trust is on file with the Secretary of State of The Commonwealth
of Massachusetts, and notice is hereby given that this instrument is executed on
behalf of the Registrant by an officer of the Registrant as an officer and not
individually and that the obligations of or arising out of this instrument are
not binding upon any of the Trustees, officers, or shareholders individually but
are binding only upon the assets and property of the Registrant.

                                                      -7-



<PAGE>



                                   SIGNATURES
   
                  Pursuant to the requirements of the Securities Act of 1933 and
the Investment Company Act of 1940, the Registrant certifies that it meets all
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment
to the Registration Statement to be signed on behalf of the undersigned,
thereunto duly authorized, in the City of Richmond, and the Commonwealth of
Virginia on this 31st day of October, 1996.
    
                                       MENTOR INSTITUTIONAL TRUST

                                          By: /s/ Paul F. Costello
                                              Paul F. Costello
                                              Title:  President

              Pursuant to the requirements of the Securities Act of 1933, this
Amendment to the Registration Statement has been signed below by the following
persons in the capacities indicated on the dates indicated.

         Signature                Title                              Date

                                 Trustee
___________________________
Arnold H. Dreyfuss

                                 Trustee
___________________________
Thomas F. Keller
   
            *                    Trustee                       October  31, 1996
- ---------------------------
Daniel J. Ludeman


             *                   Trustee                       October  31, 1996
- ---------------------------
Louis W. Moelchert, Jr.



                                                      -8-



<PAGE>



             *                   Trustee                       October 31, 1996
- ---------------------------
Stanley F. Pauley


             *                   Trustee                       October  31, 1996
- ---------------------------
Troy A. Peery, Jr.


/s/ Paul F. Costello             President                     October  31, 1996
- ---------------------------      (Principal Executive Officer)
Paul F. Costello



/s/ Terry L. Perkins             Treasurer                     October 31, 1996
- ---------------------------      (Principal Financial and
Terry L. Perkins                  Accounting Officer)


*By /s/ Paul F. Costello                                       October 31, 1996
   ------------------------
    Paul F. Costello
    Attorney-in-Fact
    

                                                -9-



<PAGE>


                                 Exhibit Index

11.           Consent of Independent Accountants
16.           Schedule of Computation of Performance
17.           Financial Data Schedule

                                                      -10-







</TABLE>

                                                 Exhibit 11


                       CONSENT OF INDEPENDENT ACCOUNTANTS




The Trustees and Shareholders
Mentor Institutional Trust




        We consent to the use of our report for SNAP Fund, a portfolio of
Mentor Institutional Trust, dated August 2, 1996, included herein and to
the references to our firm under the captions "FINANCIAL HIGHLIGHTS" in
the prospectus and "INDEPENDENT ACCOUNTANTS" in the statement of
additional information of SNAP Fund.



                                        KPMG Peat Marwick LLP

Boston Massachusetts
October 29, 1996






                                                              EXHIBIT 16

               SCHEDULE OF COMPUTATION OF PERFORMANCE INFORMATION

Yield Computation Schedule

Account Balance (1 share @ $1.00)            1.000000000

Dividend Declaration
                June 30, 1996                0.000145842
                June 29, 1996                0.000145842
                June 28, 1996                0.000145842
                June 27, 1996                0.000145025
                June 26, 1996                0.000144215
                June 25, 1996                0.000145004
                June 24, 1996                0.000144876
                                             -----------
                                             0.001016646

Ending Account Balance                       1.001016646
Less: Beginning Account Balance              1.000000000
                                             -----------
   Difference                                0.001016646


Base Period Return
  (Difference/Beginning Account Balance)     0.001016646

Yield Quotation
        (Base Period Return 365/7)                  5.30%

Effective Yield Quotation
        [(Base Period Return +1)^367/7)]            5.44%

Performance Calculation

Initial Investment              1,000.00
Initial NAV                         1.00
Initial Shares                  1,000.00
Shares from Distribution           52.90
End of Period NAV                   1.00
Total Return                        5.29%


<TABLE> <S> <C>


<ARTICLE> 6
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1996
<PERIOD-END>                               JUN-30-1996
<INVESTMENTS-AT-COST>                      952,027,199
<INVESTMENTS-AT-VALUE>                     952,027,199
<RECEIVABLES>                                2,715,545
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                           403,523
<TOTAL-ASSETS>                             955,146,267
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      368,854
<TOTAL-LIABILITIES>                            368,854
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   954,777,413
<SHARES-COMMON-STOCK>                      954,777,413
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               954,777,413
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           44,059,888
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (931,082)
<NET-INVESTMENT-INCOME>                     43,128,806
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                       43,128,806
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   43,128,806
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                  1,984,712,652
<NUMBER-OF-SHARES-REDEEMED>            (1,073,065,307)
<SHARES-REINVESTED>                         43,128,806
<NET-CHANGE-IN-ASSETS>                     954,777,413
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          667,271
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                931,082
<AVERAGE-NET-ASSETS>                       831,836,913
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.05
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.00
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        




</TABLE>


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