MFS SERIES TRUST X
485BPOS, 1996-05-28
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      As filed with the Securities and Exchange Commission on May 28, 1996
    
                                            1933 Act File No. 33-1657
                                            1940 Act File No. 811-4492
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ---------------

                                   FORM N-1A
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
   
                        POST-EFFECTIVE AMENDMENT NO. 15
    
                                      AND
                             REGISTRATION STATEMENT
                                     UNDER
                       THE INVESTMENT COMPANY ACT OF 1940
   
                                AMENDMENT NO. 16
    
                               MFS SERIES TRUST X
                    (formerly, MFS Government Mortgage Fund)
               (Exact Name of Registrant as Specified in Charter)

                500 Boylston Street, Boston, Massachusetts 02116
                    (Address of Principal Executive Offices)

        Registrant's Telephone Number, including Area Code: 617-954-5000
          Stephen E. Cavan, Massachusetts Financial Services Company,
                     500 Boylston Street, Boston, MA 02116
                    (Name and Address of Agent for Service)

                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
 It is proposed that this filing will become effective (check appropriate box)

|_| immediately  upon filing  pursuant to paragraph (b)
   
|X| on June 27, 1996  pursuant  to  paragraph (b)
    
|_| 60 days after  filing  pursuant to paragraph (a)(i)
|_| on [DATE] pursuant to paragraph (a)(i)
|_| 75 days after filing pursuant to paragraph (a)(ii)
|_| on [DATE]  pursuant to paragraph (a)(ii) of rule 485.

If appropriate, check the following box:
|_|  this post-effective amendment designates a new effective date for
     a previously filed post-effective amendment
   
Pursuant to Rule 24f-2, the Registrant has registered an indefinite number of
its shares of Beneficial Interest (without par value), under the Securities
Act of 1933.  The Registrant filed a Rule 24f-2 Notice for its fiscal year
ended July 31, 1995 on September 29, 1995 and will file a Rule 24f-2 Notice on
behalf of MFS/Foreign & Colonial International Growth Fund, MFS/Foreign &
Colonial International Growth and Income Fund and MFS/Foreign & Colonial
Emerging Markets Equity Fund with respect to the fiscal year ending May 31, 1996
on or before July 31, 1996.
    
================================================================================
<PAGE>
   
                MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND

          MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND
              MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND

    Supplement to the April 25, 1996 Prospectus and Statement of Additional
                                  Information


         The following information should be read in conjunction with the Fund's
Prospectus and Statement of Additional Information ("SAI") dated April 25, 1996,
and contains a description of Class C shares.

EXPENSE SUMMARY

Shareholder Transaction Expenses:               Class A    Class B     Class C

Maximum Initial Sales Charge Imposed
  on Purchases of Fund Shares (as a
  percentage of offering price)                  4.75%       0.00%      0.00%
Maximum Contingent Deferred Sales
  Charge (as a percentage of original
  purchase price or redemption proceeds,
  as applicable)                               See Below(1)  4.00%      1.00%

Annual Operating Expenses of the Funds (as a percentage of average net assets):

                                                        Class A Shares
                                                     International     Emerging
                                    International    Growth and        Markets
                                    Growth Fund      Income Fund     Equity Fund
Management Fees                     0.975%           0.975%            1.25%
Rule 12b-1 Fees(2)                  0.50 %           0.50 %            0.50%
Other Expenses (after expense
  reimbursement)(3)(4)              0.635%           1.055%            0.75%(5)
Total Operating Expenses
  (after expense reimbursement)     2.11 %           2.53 %            2.50%(5)

                                                        Class B Shares
                                                     International     Emerging
                                    International    Growth and        Markets
                                    Growth Fund      Income Fund     Equity Fund
Management Fees                     0.975%           0.975%            1.25%
Rule 12b-1 Fees(6)                  1.00 %           1.00 %            1.00%
Other Expenses (after expense
  reimbursement)(3)(4)              0.745%           1.205%            0.82%(5)
Total Operating Expenses
  (after expense reimbursement)     2.72 %           3.18 %            3.07%(5)

                                                       Class C Shares
                                                     International     Emerging
                                    International    Growth and        Markets
                                    Growth Fund      Income Fund     Equity Fund
Management Fees                     0.975%           0.975%            1.25%
Rule 12b-1 Fees(6)                  1.00 %           1.00 %            1.00%
Other Expenses (after expense
  reimbursement)(3)(4)              0.635%           1.055%            0.75%(5)
Total Operating Expenses
  (after expense reimbursement)     2.61 %           3.03 %            3.00%(5)

(1)  Purchases of $1 million or more and certain  purchases by retirement  plans
     are not subject to an initial sales charge;  however, a contingent deferred
     sales  charge (a "CDSC") of 1.00% will be imposed on such  purchases
    
<PAGE>
   
     in the event of certain redemption  transactions within 12 months following
     such purchases (see "Purchases" in the Prospectus).

(2)  Each  Fund  has  adopted  a  Distribution  Plan for its  Class A shares  in
     accordance  with Rule 12b-1 under the  Investment  Company Act of 1940,  as
     amended   (the   "1940   Act"),   which   provides   that   it   will   pay
     distribution/service  fees  aggregating up to (but not  necessarily all of)
     0.50% per annum of the average daily net assets attributable to each Fund's
     Class A shares.  See "Distribution  Plans" in the Prospectus.  Distribution
     expenses  paid under these Plans,  together  with the initial sales charge,
     may cause long-term  shareholders to pay more than the maximum sales charge
     that would have been  permissible  if imposed  entirely as an initial sales
     charge.

(3)  "Other  Expenses" are based on estimates for each Fund's fiscal year ending
     July 31, 1996.

(4)  Each Fund has an  expense  offset  arrangement  which  reduces  the  Fund's
     custodian fee based upon the amount of cash maintained by the Fund with its
     custodian  and  dividend  disbursing  agent,  and may enter into other such
     arrangements and directed brokerage arrangements (which would also have the
     effect of reducing the Fund's  expenses).  Any such fee  reductions are not
     reflected under "Other Expenses."

(5)  Massachusetts  Financial  Services  Company  ("MFS")  has  agreed  to bear,
     subject  to  reimbursement  by the  Emerging  Markets  Equity  Fund,  until
     December 31,  2005,  expenses of each class of shares of the Fund such that
     the  aggregate  expenses of the  Emerging  Markets  Equity  Fund's  Class A
     shares,  Class B shares and Class C shares do not exceed  2.50%,  3.07% and
     3.00%,  respectively,  of  the  Fund's  average  daily  net  assets  on  an
     annualized  basis.  This arrangement may be terminated or revised by MFS at
     any time (see  "Information  Concerning  Shares of the Funds - Expenses" in
     the  Prospectus).   Absent  this  expense  arrangement,   estimated  "Other
     Expenses" and "Total  Operating  Expenses" for the Emerging  Markets Equity
     Fund would be 1.17% and 2.92%, respectively,  for Class A shares, 1.25% and
     3.50%, respectively for Class B shares, and 1.17% and 3.42%,  respectively,
     for Class C shares.

(6)  Each Fund has adopted separate  Distribution  Plans for its Class B and its
     Class C shares in  accordance  with Rule  12b-1  under the 1940 Act,  which
     provides that it will pay distribution/service  fees aggregating up to (but
     not  necessarily  all of) 1.00% per annum of the  average  daily net assets
     attributable  to each Fund's Class B shares under the Class B  Distribution
     Plan  and  Class  C  shares  under  the  Class  C  Distribution  Plan.  See
     "Distribution  Plans" below and in the  Prospectus.  Distribution  expenses
     paid under these Plans,  together with any CDSC payable upon  redemption of
     Class B and Class C shares,  may cause  long-term  shareholders to pay more
     than the maximum sales charge that would have been  permissible  if imposed
     entirely as an initial sales charge.

Example of Expenses

         An investor  would pay the  following  dollar  amounts of expenses on a
$1,000 investment in the each Fund,  assuming (a) a 5% annual return and, unless
otherwise  noted,  (b)  redemption  at the  end of  each  of  the  time  periods
indicated:

                                            International Growth Fund
         Period                  Class A         Class B             Class C
                                                     (1)               (1)
         1 year                   $ 68         $ 68     $28      $36      $26
         3 years                   110          114      84       81       81

                                    International Growth and Income Fund
         Period                  Class A         Class B             Class C
                                                     (1)               (1)
         1 year                   $ 72         $ 72     $32      $41      $31
         3 years                   123          128      98       94       94
    
<PAGE>
   
                                            Emerging Markets Equity Fund
         Period                  Class A         Class B             Class C
                                                     (1)               (1)
         1 year                   $ 72         $ 71     $31      $40      $30
         3 years                   122          125      95       93       93

(1)      Assumes no redemption.

         The  purpose  of the  expense  table  above is to assist  investors  in
understanding  the various costs and expenses  that a  shareholder  of the Funds
will bear directly or indirectly.  More complete  descriptions  of the following
Fund expenses are set forth in the  following  sections of the  Prospectus:  (i)
varying  sales  charges on share  purchases -  "Purchases";  (ii) varying  CDSCs
"Purchases";  (iii)  management fees - "Investment  Adviser" and (iv) Rule 12b-1
(I.E., distribution plan) fees - "Distribution Plans."

The "Example" set forth above should not be considered a representation  of past
or future  expenses of any Funds;  actual  expenses  may be greater or less than
those shown.

THE FUND

         Three  classes  of shares of each Fund  currently  are  offered  to the
general  public.  Class A shares are  offered at net asset value plus an initial
sales charge up to a maximum of 4.75% of the offering  price (or a CDSC of 1.00%
upon redemption  during the first year in the case of purchases of $1 million or
more and  certain  purchases  by  retirement  plans)  and  subject  to an annual
distribution  fee and  service  fee up to a maximum of 0.50% per annum.  Class B
shares are offered at net asset value  without an initial  sales  charge but are
subject to a CDSC upon redemption (declining from 4.00% during the first year to
0% after six  years)  and an annual  distribution  fee and  service  fee up to a
maximum  of 1.00%  per  annum;  Class B shares  will  convert  to Class A shares
approximately  eight  years  after  purchase.  Class C shares are offered at net
asset value  without an initial  sales charge but are subject to a CDSC of 1.00%
upon redemption during the first year and an annual distribution fee and service
fee up to a maximum  of 1.00% per  annum.  Class C shares do not  convert to any
other class of shares of a Fund.

INFORMATION CONCERNING SHARES OF THE FUND

Purchases

         Each Fund offers three  classes of shares which bear sales  charges and
distribution fees in different forms and amounts. Class A and Class B shares are
described in the Prospectus and SAI, and Class C shares are described below.

         Class C Shares:  Class C shares are offered at net asset value  without
an  initial  sales  charge but are  subject  to a CDSC of 1.00% upon  redemption
during the first  year.  The  maximum  investment  in Class C shares is up to $1
million per transaction.

         The CDSC  imposed is  assessed  against  the lesser of the value of the
shares   redeemed   (exclusive   of   reinvested   dividend   and  capital  gain
distributions)  or the total cost of such  shares.  No CDSC is assessed  against
shares acquired  through the automatic  reinvestment of dividend or capital gain
distributions.  In certain  circumstances,  the CDSC imposed upon  redemption of
Class C shares is waived.  Circumstances  under which sales  charges  imposed on
Class A and Class B shares are waived are described in the Prospectus.  The CDSC
imposed upon  redemption  of Class C shares is waived in the same  circumstances
that apply to the waiver of the Class B CDSC. See "Redemptions and Repurchases -
Contingent Deferred Sales Charge" below for further discussion of the CDSC.
    
<PAGE>
   
         MFD will pay  dealers  1.00%  of the  purchase  price of Class C shares
purchased  through  dealers and, as compensation  therefor,  MFD will retain the
1.00% per annum distribution and service fee paid under the Class C Distribution
Plan by the Fund to MFD for the first year  after  purchase  (see  "Distribution
Plans" below).  In addition,  MFD or its affiliates  may, from time to time, pay
dealers an  additional  commission  equal to 0.50% of the net asset value of all
Class C shares sold by such dealers during a specified sales period.

         Class  C  shares  are  not  currently  available  for  purchase  by any
retirement plan qualified under Section 401(a) or 403(b) of the Internal Revenue
Code of 1986,  as  amended  (the  "Code"),  if the  retirement  plan  and/or the
sponsoring  organization subscribe to the MFS FUNDamental 401(k) Plan or another
similar recordkeeping program made available by the Shareholder Servicing Agent.

Exchanges

         Some or all of the Class C shares in an account with the Fund for which
payment has been  received by the Fund (I.E.,  an  established  account)  may be
exchanged  for Class C shares  of any other MFS Fund in the MFS  Family of Funds
(the "MFS Funds") at net asset value (if  available  for sale).  No CDSC will be
imposed in  connection  with an exchange  from Class C shares of the Fund to any
other MFS Fund; however, the holding period for purposes of calculating the CDSC
will carry over to the acquired shares.

Redemptions and Repurchases

         Contingent  Deferred  Sales  Charge:  Investments  in  Class  C  shares
("Direct Purchase") will be subject to a 1.00% CDSC upon redemption for a period
of 12  months.  Purchases  of  Class C shares  made  during  a  calendar  month,
regardless of when during the month the investment  occurred,  will age one year
at the close of business on the last day of such month in the following calendar
year.  Prior to April 1, 1996,  Class C shares of the MFS Funds were not subject
to a CDSC  upon  redemption.  In no event  will  Class C shares of the MFS Funds
purchased  prior  to  this  date  be  subject  to a CDSC.  For  the  purpose  of
calculating  the CDSC upon  redemption  of shares  acquired in an exchange on or
after April 1, 1996, the purchase of shares acquired in one or more exchanges is
deemed to have  occurred at the time of the original  purchase of the  exchanged
shares (if such original  purchase occurred prior to April 1, 1996, then no CDSC
would be imposed upon such a redemption).

         At the  time of a  redemption,  the  amount  by  which  the  value of a
shareholder's  account  represented  by Direct  Purchases  exceeds the sum of 12
months of Direct  Purchases  may be redeemed  without  charge  ("Free  Amount").
Moreover,  no CDSC is ever assessed on additional  shares  acquired  through the
automatic  reinvestment of dividend or capital gain  distributions  ("Reinvested
Shares").  Therefore,  at the time of redemption of Class C shares, (i) any Free
Amount is not subject to the CDSC and (ii) the amount of the redemption equal to
the  then-current  value of  Reinvested  Shares is not subject to the CDSC,  but
(iii)  any  amount  of  the  redemption  in  excess  of  the  aggregate  of  the
then-current  value of  Reinvested  Shares  and the Free  Amount is subject to a
CDSC. The CDSC will first be applied against the amount of Direct Purchases made
which will result in any such charge being imposed at the lowest possible rate.

         The  applicability  of a CDSC for Class C shares will be  unaffected by
exchanges or transfers of  registration,  except as described in the  Prospectus
for Class B shares.

         Reinstatement  Privilege:  Class C  shareholders  of the  Fund who have
redeemed their shares have a one-time right to reinvest the redemption  proceeds
in the same  class of shares of any of the MFS Funds (if shares of such Fund are
available  for sale) at net asset value (with a credit for any CDSC paid) within
90 days of the redemption pursuant to the Reinstatement  Privilege. If the Class
C shares  credited for any CDSC paid are then  redeemed  within 12 months of the
initial purchase,  a CDSC will be imposed upon redemption.  Such purchases under
the Reinstatement  Privilege are subject to all limitations in the SAI regarding
the privilege.
    
<PAGE>
   
Distribution Plans

         The Trustees  have  adopted  separate  Distribution  Plans for Class A,
Class B and Class C shares  pursuant  to Section  12(b) of the 1940 Act and Rule
12b-1 thereunder,  after having concluded that there is a reasonable  likelihood
that the  Distribution  Plans would benefit the Fund and its  shareholders.  The
Distribution  Plans  for  Class  A and  Class  B  shares  are  described  in the
Prospectus (see "Distribution Plans" therein).  The Distribution Plans for Class
C shares are described below.

         Each Class C  Distribution  Plan  provides  that the Fund may pay MFD a
service  fee  of up  to  0.25%  per  annum  of  the  average  daily  net  assets
attributable  to Class C shares in order that MFD may pay  expenses on behalf of
the Fund relating to the servicing of Class C shares. The service fee is used by
MFD to  compensate  dealers  which  enter  into a sales  agreement  with  MFD in
consideration  for all personal  services  and/or account  maintenance  services
rendered by the dealer with  respect to Class C shares  owned by  investors  for
whom such  dealer is the dealer or holder of  record.  MFD may from time to time
reduce the amount of service fees paid for shares sold prior to a certain  date.
Service  fees may be reduced for a dealer that is the holder or dealer of record
for an investor who owns shares of the Fund having an aggregate  net asset value
at or above a certain dollar level. Dealers may from time to time be required to
meet certain  criteria in order to receive  service fees.  MFD or its affiliates
are  entitled to retain  service  fees for which there is no dealer of record or
for which qualification standards have not been met as partial consideration for
personal services and/or account  maintenance  services  performed by MFD or its
affiliates to shareholder accounts.

         Each Class C Distribution  Plan also provides that the Fund may pay MFD
a  distribution  fee equal to 0.75% per annum of the  Fund's  average  daily net
assets attributable to Class C shares as partial  consideration for distribution
services performed and expenses incurred in the performance of MFD's obligations
under its  distribution  agreement with the Fund. See  "Management of the Fund -
Distributor" in the SAI. While the amount of compensation received by MFD in the
form of  distribution  fees during any year may be more or less than the expense
incurred by MFD under its  distribution  agreement with the Funds, a Fund is not
liable to MFD for any  losses  MFD may incur in  performing  services  under its
distribution agreement with the Funds.

         As discussed under the caption  "Purchases"  above,  Class C shares are
offered at net asset value  without an initial sales charge but are subject to a
CDSC of 1.00% upon  redemption  during the first year. MFD will pay a commission
to dealers of 1.00% of the purchase  price of Class C shares  purchased  through
dealers at the time of purchase.  In compensation for this 1.00% commission paid
by MFD to dealers,  MFD will retain the 1.00% per annum distribution and service
fees  paid by a Fund with  respect  to such  shares  for the  first  year  after
purchase, and dealers will become eligible to receive from MFD the ongoing 1.00%
per annum  distribution and service fees paid by the Fund to MFD with respect to
such shares commencing in the thirteenth month following purchase.

         Fees payable  under the Class C  Distribution  Plan are charged to, and
therefore reduce, income allocated to Class C shares.

Distributions

         Distributions  paid by each Fund with  respect  to Class A shares  will
generally  be greater than those paid with respect to Class B and Class C shares
because  expenses  attributable  to Class B and Class C shares will generally be
higher.

Description of Shares, Voting  Rights and Liabilities

         Each Fund has three  classes  of shares  entitled  Class A, Class B and
Class C Shares of Beneficial Interest (without par value).
    
<PAGE>
   
Performance Information

         Total  rate of return  quotations  for Class C  shares,  if quoted  for
periods of one year or less,  will give  effect to the  imposition  of the 1.00%
CDSC  assessed upon  redemption  of Class C shares  during the first year.  Such
total rate of return  quotations may be  accompanied by quotations  which do not
reflect  the  deduction  of the  CDSC,  and  will  thus  be  higher.  Yield  and
distribution rate calculations for Class C shares assume no CDSC is paid.

Expenses

         MFS has agreed to pay until  December  31,  2005,  the  expenses of the
Emerging Markets Equity Fund such that the aggregate  operating  expenses of the
Emerging Markets Equity Fund's Class C shares do not exceed 3.00% per annum.

SHAREHOLDER SERVICES

Investment and Withdrawal Programs-

         Letter  of  Intent:  Purchases  of Class C  shares  will  apply  toward
completion  of a Letter  of  Intent  with  respect  to Class A  shares.  See the
Prospectus for further information on the Letter of Intent.

         Right  of  Accumulation:   The  current  offering  price  value  of  an
investor's  holdings of Class C shares  will apply  toward  cumulative  quantity
discounts  on  purchases  of Class A  shares.  See the  Prospectus  for  further
information on the Right of Accumulation.

         Systematic Withdrawal Plan: The aggregate withdrawals of Class C shares
in any year pursuant to a Systematic Withdrawal Plan ("SWP") will not be subject
to a CDSC and  generally  are  limited to 10% of the value of the account at the
time of establishment of the SWP.

INFORMATION CONCERNING SHARE OWNERSHIP

         Merrill Lynch,  Pierce,  Fenner & Smith, P.O. Box 45286,  Jacksonville,
Florida,  was the record owner of the  following  percentages  of the  following
class of shares outstanding as of May 3, 1996, of the following funds:

                                                     Class    % Owned

         International Growth Fund                   A        11.76%
         International Growth Fund                   B        18.98%
         International Growth and Income Fund        A          8.96%
         International Growth and Income Fund        B        16.28%
         Emerging Markets Equity Fund                B          9.04%

                  The date of this Supplement is July 1, 1996.
    
<PAGE>
   
The Prospectus dated April 25, 1996 of MFS/Foreign & Colonial International
Growth Fund, MFS/Foreign & Colonial International Growth and Income Fund and
MFS/Foreign & Colonial Emerging Markets Equity Fund is incorporated in this
Post-Effective  Amendment No. 15 by reference to the Prospectus of MFS/Foreign &
Colonial  International Growth Fund, MFS/Foreign & Colonial International Growth
and Income Fund and MFS/Foreign & Colonial Emerging Markets Equity Fund filed by
the  Registrant  pursuant  to Rule 497  under  the  Securities  Act of 1933,  as
amended, with the Securities and Exchange Commission via EDGAR on April 29
1996.
    
<PAGE>
   
The Statement of Additional  Information  dated April 25, 1996 of  MFS/Foreign &
Colonial  International Growth Fund, MFS/Foreign & Colonial International Growth
and Income  Fund and  MFS/Foreign  & Colonial  Emerging  Markets  Equity Fund is
incorporated  in  this  Post-Effective  Amendment  No.  15 by  reference  to the
Statement of Additional  Information  of  MFS/Foreign  & Colonial  International
Growth Fund,  MFS/Foreign  & Colonial  International  Growth and Income Fund and
MFS/Foreign  & Colonial  Emerging  Markets  Equity Fund filed by the  Registrant
pursuant to Rule 497 under the  Securities  Act of 1933,  as  amended,  with the
Securities and Exchange Commission via EDGAR on April 29 1996.
    
<PAGE>
   
The financial  statements  included in the Semi-Annual Report to Shareholders of
MFS/Foreign  &  Colonial  International  Growth  Fund,  MFS/Foreign  &  Colonial
International Growth and Income Fund and MFS/Foreign & Colonial Emerging Markets
Equity  Fund dated  January  31,  1996  which are  contained  in  Post-Effective
Amendment No. 14 as filed by the  Registrant  with the  Securities  and Exchange
Commission via EDGAR on April 24, 1996 are hereby  incorporated  by reference to
such materials into this Post-Effective Amendment No. 15.
    
<PAGE>
                                     PART C


Item 24  Financial Statements and Exhibits

         (a)      Financial Statements Included in Part A:

                  MFS/Foreign & Colonial International Growth Fund

                           For the period from the commencement of investment
                           operations, October 24, 1995 to January 31, 1996:
   
                                    Financial Highlights*
    
                  Financial Statements Included in Part B:

                           At January 31, 1996:
                                    Portfolio of Investments*
                                    Statement of Assets and Liabilities*

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Operations*

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Changes in Net Assets*
- -----------------------------------
*   Incorporated  herein  by  reference  to the  Fund's  Semi-Annual  Report  to
    Shareholders  dated January 31, 1996,  filed with the SEC via EDGAR on April
    3, 1996.

         (a)      Financial Statements Included in Part A:

                  MFS/Foreign & Colonial International Growth and Income Fund

                           For the period from the commencement of investment
                           operations, October 24, 1995 to January 31, 1996:
   
                                    Financial Highlights*
    
                  Financial Statements Included in Part B:

                           At January 31, 1996:
                                    Portfolio of Investments*
                                    Statement of Assets and Liabilities*

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Operations*
<PAGE>

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Changes in Net Assets*
- -----------------------------------
*   Incorporated  herein  by  reference  to the  Fund's  Semi-Annual  Report  to
    Shareholders  dated January 31, 1996,  filed with the SEC via EDGAR on April
    3, 1996.

         (a)      Financial Statements Included in Part A:

                  MFS/Foreign & Colonial Emerging Markets Equity Fund

                           For the period from the commencement of investment
                           operations, October 24, 1995 to January 31, 1996:
   
                                    Financial Highlights*
    
                  Financial Statements Included in Part B:

                           At January 31, 1996:
                                    Portfolio of Investments*
                                    Statement of Assets and Liabilities*

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Operations*

                           For the period from the commencement of investment
                           operations October 24, 1995, to January 31, 1996:
                                    Statement of Changes in Net Assets*
- -----------------------------------
*   Incorporated  herein  by  reference  to the  Fund's  Semi-Annual  Report  to
    Shareholders  dated January 31, 1996,  filed with the SEC via EDGAR on April
    3, 1996.

         (b)      Exhibits

                   1       (a)      Amended and Restated Declaration of
                                    Trust, dated January 19, 1995.  (3)

                           (b)      Amendment to the Declaration of Trust
                                    dated June 2, 1995 to change the name
                                    of the Trust and for the establishment
                                    and designation of series and
                                    classes.  (4)
   
                           (c)      Amendment to the Declaration of Trust -
                                    Designation of Class, dated May 15,
                                    1996; filed herewith.
    
                   2                Amended and Restated By-Laws, dated
                                    December 21, 1994. (3)

                   3                Not Applicable.
<PAGE>
   
                   4                Form of Share Certificate for Class A,
                                    Class B and Class C shares of the
                                    Fund. (5)

                   5       (a)      Investment Advisory Agreement for MFS
                                    Government Mortgage Fund, dated
                                    December 19, 1985.  (7)

                           (b)      Amendment to Investment Advisory
                                    Agreement for MFS Government
                                    Mortgage Fund, dated January 1,
                                    1996.  (7)

                           (c)      Investment Advisory Agreement for MFS Series
                                    Trust  X  (the   "Trust")   on   behalf   of
                                    MFS/Foreign & Colonial  International Growth
                                    Fund, dated September 1,
                                    1995.  (7)

                           (d)      Investment Advisory Agreement for the
                                    Trust on behalf of MFS/Foreign &
                                    Colonial International Growth and
                                    Income Fund, dated September 1,
                                    1995.  (7)

                           (e)      Investment Advisory Agreement for the
                                    Trust on behalf of MFS/Foreign &
                                    Colonial Emerging Markets Equity Fund,
                                    dated September 1, 1995.  (7)

                           (f)      Sub-Advisory Agreement between
                                    Massachusetts Financial Services
                                    Company (the "Adviser" or "MFS") and
                                    Foreign & Colonial Management Ltd.
                                    (the "Sub-Adviser") with respect to
                                    MFS/Foreign & Colonial International
                                    Growth Fund, dated September 1,
                                    1995.  (7)

                           (g)      Sub-Advisory Agreement  between the
                                    Adviser and the Sub-Adviser with
                                    respect to MFS/Foreign & Colonial
                                    International Growth and Income Fund,
                                    dated September 1, 1995.  (7)

                           (h)      Sub-Advisory Agreement  between the
                                    Adviser and the Sub-Adviser with
                                    respect to MFS/Foreign & Colonial
                                    Emerging Markets Equity Fund, dated
                                    September 1, 1995.  (7)

                           (i)      Sub-Advisory Agreement between the
                                    Sub-Adviser and Foreign & Colonial
                                    Emerging Markets Limited ("FCEM")
                                    with respect to the MFS/Foreign &
                                    Colonial International Growth Fund,
                                    dated September 1, 1995.  (7)

                           (j)      Sub-Advisory Agreement between the
                                    Sub-Adviser and FCEM with respect to
                                    the MFS/Foreign & Colonial International
                                    Growth and Income Fund, dated
                                    September 1, 1995.  (7)

                           (k)      Sub-Advisory Agreement between the
                                    Sub-Adviser  and FCEM  with  respect  to the
                                    MFS/Foreign  &  Colonial   Emerging  Markets
                                    Equity Fund, dated September
                                    1, 1995.  (7)
    
<PAGE>
   
                   6       (a)      Distribution Agreement between MFS
                                    Series Trust X and MFS Fund
                                    Distributors, Inc., dated September 1,
                                    1995.  (7)
    
                           (b)      Dealer Agreement between MFS Funds
                                    Distributors, Inc. and a dealer, dated
                                    December 28, 1994 and the Mutual
                                    Funds Agreement between MFD and a
                                    bank or NASD affiliate, dated December
                                    28, 1994.  (1)
   
                   7                Retirement Plan for Non-Interested
                                    Person Trustees, dated January 1,
                                    1991.  (7)

                   8       (a)      Custodian Agreement, dated February
                                    19, 1988.  (7)

                           (b)      Amendment No. 1 to Custodian
                                    Agreement, dated February 29,
                                    1988.  (7)

                           (c)      Amendment No. 2 to Custodian
                                    Agreement, dated October 1, 1989.  (7)

                           (d)      Amendment No. 3 to Custodian
                                    Agreement, dated September 17,
                                    1991.  (7)

                   9       (a)      Shareholder Servicing Agent
                                    Agreement, dated September 1,
                                    1995.  (7)

                           (b)      Form of Amendment to the Shareholder
                                    Servicing Agreement; filed herewith.

                           (c)      Exchange Privilege Agreement, dated
                                    September 1, 1995.  (7)
    
                           (d)      Loan Agreement by and among the
                                    Banks named therein, the MFS Funds
                                    named therein, and the First National
                                    Bank of Boston dated as of  February
                                    21, 1995.  (2)

                           (e)      Dividend Disbursing Agency Agreement,
                                    dated February 1, 1986.  (5)
   
                  10                Consent  and  Opinion of Counsel  previously
                                    filed  with  the  Registrant's  24(e)  share
                                    registration  as  part  of  Post-  Effective
                                    Amendment  No.  13  filed on  behalf  of MFS
                                    Government Mortgage Fund for the fiscal year
                                    ended  July 31,  1995,  and to be filed  for
                                    MFS/Foreign & Colonial  International Growth
                                    Fund,  MFS/Foreign & Colonial  International
                                    Growth and  Income  Fund and  MFS/Foreign  &
                                    Colonial Emerging Markets Equity Fund of the
                                    Registrant  on or before  July 31,  1996 for
                                    the fiscal year ended May 31, 1996.

                  11                Consent of Deloitte & Touche LLP.  (8)
    
<PAGE>

                  12                Not Applicable.
   
                  13                Investment Representation Letter for
                                    MFS Government Mortgage Fund.  (7)
    
                  14       (a)      Forms for Individual Retirement Account
                                    Disclosure Statement as currently in
                                   effect. (6)

                           (b)      Forms for MFS 403(b) Custodial
                                    Account Agreement as currently in
                                   effect. (6)

                           (c)      Forms for MFS Prototype Paired
                                    Defined Contribution Plans and Funds
                                    Agreement as currently in effect.  (6)

                  15       (a)      Amended and Restated Distribution Plan
                                    for Class A shares of MFS Government
                                    Mortgage Fund dated December 21,
                                    1994.  (3)

                           (b)      Distribution Plan for Class B shares of
                                    MFS Government Mortgage Fund dated
                                    December 21, 1994.  (3)
   
                           (c)      Distribution Plan for Class A shares of
                                    MFS/Foreign & Colonial International
                                    Growth Fund dated September 1,
                                    1995.  (7)

                           (d)      Distribution Plan for Class A shares of
                                    MFS/Foreign & Colonial International
                                    Growth and Income Fund dated
                                    September 1, 1995.  (7)

                           (e)      Distribution Plan for Class A shares of
                                    MFS/Foreign & Colonial Emerging
                                    Markets Equity Fund dated September
                                    1, 1995.  (7)

                           (f)      Distribution Plan for Class B shares of
                                    MFS/Foreign & Colonial International
                                    Growth Fund dated September 1,
                                    1995.  (7)

                           (g)      Distribution Plan for Class B shares of
                                    MFS/Foreign & Colonial International
                                    Growth and Income Fund dated
                                    September 1, 1995.  (7)

                           (h)      Distribution Plan for Class B shares of
                                    MFS/Foreign & Colonial Emerging
                                    Markets Equity Fund dated September
                                    1, 1995.  (7)

                           (i)      Form of Distribution Plan for Class C shares
                                    of  MFS/Foreign  &  Colonial   International
                                    Growth Fund; filed herewith.

                           (j)      Form of Distribution Plan for Class C shares
                                    of  MFS/Foreign  &  Colonial   International
                                    Growth and Income Fund; filed herewith.

                           (k)      Form of Distribution Plan for Class C shares
                                    of MFS/Foreign & Colonial  Emerging  Markets
                                    Equity Fund; filed herewith.
    
<PAGE>

                  16                Schedule for Computation of
                                    Performance Quotations - Average
                                    Annual Total Rate of Return, Aggregate
                                    Total Rate of Return, Standardized Yield
                                    and Distribution Rate.  (1)
   
                  17                Not Applicable.
    
                  18                Not Applicable.

                  Power of Attorney, dated September 21, 1994.  (3)
- -----------------------------
(1)  Incorporated by reference to MFS Municipal Series Trust (File Nos.
     2-92915 and 811-4096) Post-Effective Amendment No. 26 filed with the SEC
     via EDGAR on February 22, 1995.
(2)  Incorporated by reference to Amendment No. 8 on Form N-2 for MFS
     Municipal Income Trust (File No. 811-4841) filed with the SEC via EDGAR
     on February 28, 1995.
(3)  Incorporated by reference to Post-Effective Amendment No. 11 filed with
     the SEC via EDGAR on March 30, 1995.
(4)  Incorporated by reference to Post-Effective Amendment No. 12 filed with
     the SEC via EDGAR on June 16, 1995.
(5)  Incorporated by reference to MFS Municipal Series Trust (File Nos.
     2-92915 and 811-4096) Post-Effective Amendment No. 28 filed with the SEC
     via EDGAR on July 28, 1995.
(6)  Incorporated by reference to MFS Series Trust IX (File Nos. 2-50409 and
     811-2464) Post-Effective Amendment No. 32 filed with the SEC via EDGAR on
     August 28, 1995.
   
(7)  Incorporated by reference to Post-Effective Amendment No. 13 filed with
     the SEC via EDGAR on November 28, 1995.
(8)  Incorporated by reference to Post-Effective Amendment No. 14 filed with
     the SEC via EDGAR on April 24, 1996.
    
Item 25. Persons Controlled by or under Common Control with
                  Registrant

                  Not Applicable.

Item 26. Number of Holders of Securities

                  MFS Government Mortgage Fund
   
                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest               38,395
         (without par value)                (as of May 3, 1996)

         Class B Shares

         Shares of Beneficial Interest               35,104
         (without par value)                (as of May 3, 1996)
    
<PAGE>
   
         MFS/Foreign & Colonial International Growth Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest               2,778
         (without par value)                (as of May 3, 1996)

         Class B Shares

         Shares of Beneficial Interest               3,114
         (without par value)                (as of May 3, 1996)

         Class C Shares

         Shares of Beneficial Interest               0
         (without par value)                (as of May 3, 1996)

         MFS/Foreign & Colonial International Growth and Income Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest               921
         (without par value)                (as of May 3, 1996)

         Class B Shares

         Shares of Beneficial Interest               1,376
         (without par value)                (as of May 3, 1996)

         Class C Shares

         Shares of Beneficial Interest               0
         (without par value)                (as of May 3, 1996)

         MFS/Foreign & Colonial Emerging Markets Equity Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest               2,042
         (without par value)                (as of May 3, 1996)
    
<PAGE>

         Class B Shares

         Shares of Beneficial Interest               2,138
         (without par value)                (as of May 3, 1996)
   
         Class C Shares

         Shares of Beneficial Interest               0
         (without par value)                (as of May 3, 1996)
    
Item 27. Indemnification

         Reference  is  hereby  made  to  (a)  Article  V  of  the  Registrant's
Declaration   of  Trust,   incorporated   by  reference   to  the   Registrant's
Post-Effective Amendment No. 11, filed with the SEC via EDGAR on March 30, 1995;
and (b) Section 9 of the Shareholder  Servicing Agent Agreement,  filed with the
Registrant's  Post-Effective Amendment No. 13 with the SEC via EDGAR on November
28, 1995.

         The Trustees and officers of the  Registrant  and the  personnel of the
Registrant's  investment  adviser  are  insured  under an errors  and  omissions
liability  insurance  policy.  The  Registrant and its officers are also insured
under the fidelity bond required by Rule 17g-1 under the Investment  Company Act
of 1940, as amended.
   
Item 28. Business and Other Connections of Investment Adviser

         MFS  serves as  investment  adviser  to the  following  open-end  Funds
comprising the MFS Family of Funds: Massachusetts Investors Trust, Massachusetts
Investors  Growth Stock Fund,  MFS Growth  Opportunities  Fund,  MFS  Government
Securities Fund, MFS Government Limited Maturity Fund, MFS Series Trust I (which
has eight series:  MFS Managed  Sectors Fund,  MFS Cash Reserve Fund,  MFS World
Asset  Allocation  Fund,  MFS Aggressive  Growth Fund,  MFS Research  Growth and
Income  Fund,  MFS Core  Growth  Fund,  MFS Equity  Income  Fund and MFS Special
Opportunities  Fund),  MFS Series Trust II (which has four series:  MFS Emerging
Growth Fund, MFS Capital Growth Fund, MFS Intermediate  Income Fund and MFS Gold
& Natural Resources Fund), MFS Series Trust III (which has two series:  MFS High
Income Fund and MFS Municipal High Income Fund),  MFS Series Trust IV (which has
four series:  MFS Money  Market  Fund,  MFS  Government  Money Market Fund,  MFS
Municipal Bond Fund and MFS OTC Fund), MFS Series Trust V (which has two series:
MFS Total  Return Fund and MFS  Research  Fund),  MFS Series Trust VI (which has
three  series:  MFS World Total Return Fund,  MFS  Utilities  Fund and MFS World
Equity Fund), MFS Series Trust VII (which has two series:  MFS World Governments
Fund and MFS Value  Fund),  MFS Series  Trust VIII  (which has two  series:  MFS
Strategic Income Fund and MFS World Growth Fund), MFS Series Trust IX (which has
three series: MFS Bond Fund, MFS Limited Maturity Fund and MFS Municipal Limited
Maturity  Fund),  MFS Series  Trust X (which  has four  series:  MFS  Government
Mortgage Fund,  MFS/Foreign & Colonial Emerging Markets Equity Fund, MFS/Foreign
& Colonial  International  Growth Fund and MFS/Foreign & Colonial  International
Growth and Income Fund),  and MFS  Municipal  Series Trust (which has 16 series:
MFS  Alabama  Municipal  Bond  Fund,  MFS  Arkansas  Municipal  Bond  Fund,  MFS
California  Municipal  Bond Fund,  MFS Florida  Municipal Bond Fund, MFS Georgia
Municipal  Bond  Fund,  MFS  Maryland  Municipal
    
<PAGE>
   
Bond Fund, MFS Massachusetts Municipal Bond Fund, MFS Mississippi Municipal Bond
Fund, MFS New York Municipal Bond Fund, MFS North Carolina  Municipal Bond Fund,
MFS  Pennsylvania  Municipal Bond Fund, MFS South Carolina  Municipal Bond Fund,
MFS Tennessee  Municipal Bond Fund,  MFS Virginia  Municipal Bond Fund, MFS West
Virginia  Municipal Bond Fund and MFS Municipal  Income Fund) (the "MFS Funds").
The  principal  business  address  of each of the  aforementioned  Funds  is 500
Boylston Street, Boston, Massachusetts 02116.

         MFS  also  serves  as  investment  adviser  of the  following  no-load,
open-end Funds: MFS Institutional Trust ("MFSIT") (which has seven series),  MFS
Variable  Insurance  Trust  ("MVI")  (which  has  twelve  series)  and MFS Union
Standard Trust ("UST") (which has two series). The principal business address of
each of the aforementioned Funds is 500 Boylston Street,  Boston,  Massachusetts
02116.

         In  addition,  MFS  serves  as  investment  adviser  to  the  following
closed-end Funds: MFS Municipal Income Trust, MFS Multimarket  Income Trust, MFS
Government  Markets Income Trust,  MFS  Intermediate  Income Trust,  MFS Charter
Income  Trust and MFS Special  Value  Trust (the "MFS  Closed-End  Funds").  The
principal business address of each of the  aforementioned  Funds is 500 Boylston
Street, Boston, Massachusetts 02116.

         Lastly,  MFS serves as investment  adviser to MFS/Sun Life Series Trust
("MFS/SL"),  Sun Growth Variable  Annuity Funds,  Inc.  ("SGVAF"),  Money Market
Variable Account,  High Yield Variable Account,  Capital  Appreciation  Variable
Account,  Government  Securities  Variable Account,  World Governments  Variable
Account, Total Return Variable Account and Managed Sectors Variable Account. The
principal  business  address of each is One Sun Life Executive  Park,  Wellesley
Hills, Massachusetts 02181.

         MFS International  Ltd. ("MIL"),  a limited liability company organized
under  the laws of the  Republic  of  Ireland  and a  subsidiary  of MFS,  whose
principal  business  address is 41-45 St.  Stephen's  Green,  Dublin 2, Ireland,
serves as  investment  adviser to and  distributor  for MFS  International  Fund
(which has four  portfolios:  MFS  International  Funds-U.S.  Equity  Fund,  MFS
International  Funds-U.S.  Emerging Growth Fund, MFS International  Funds-Global
Governments  Fund, MFS  International  Funds - U.S.  Dollar Reserve Fund and MFS
International  Funds-Charter  Income Fund) (the "MIL Funds").  The MIL Funds are
organized in Luxembourg and qualify as an undertaking for collective investments
in transferable  securities  (UCITS).  The principal business address of the MIL
Funds is 47, Boulevard Royal, L-2449 Luxembourg.

         MIL also  serves  as  investment  adviser  to and  distributor  for MFS
Meridian  U.S.  Government  Bond Fund,  MFS Meridian  Charter  Income Fund,  MFS
Meridian  Global  Government  Fund, MFS Meridian U.S.  Emerging Growth Fund, MFS
Meridian  Global Equity Fund, MFS Meridian  Limited  Maturity Fund, MFS Meridian
World Growth  Fund,  MFS Meridian  Money Market Fund,  MFS Meridian  World Total
Return  Fund,  MFS Meridian  U.S.  Equity Fund and MFS  Meridian  Research  Fund
(collectively  the "MFS  Meridian  Funds").  Each of the MFS  Meridian  Funds is
organized  as an  exempt  company  under  the laws of the  Cayman  Islands.  The
principal  business  address of each of the MFS Meridian  Funds is P.O. Box 309,
Grand Cayman, Cayman Islands, British West Indies.
    
<PAGE>
   
         MFS  International  (U.K.) Ltd.  ("MIL-UK"),  a private limited company
registered  with the  Registrar of Companies for England and Wales whose current
address is 4 John  Carpenter  Street,  London,  England  ED4Y 0NH,  is  involved
primarily  in  marketing  and  investment  research  activities  with respect to
private clients and the MIL Funds and the MFS Meridian Funds.

         MFS Fund Distributors, Inc. ("MFD"), a wholly owned subsidiary of
MFS, serves as distributor for the MFS Funds, MVI, UST and MFSIT.

         Clarendon Insurance Agency, Inc. ("CIAI"), a wholly owned subsidiary
of MFS, serves as distributor for certain life insurance and annuity contracts
issued by Sun Life Assurance Company of Canada (U.S.).

         MFS Service Center, Inc. ("MFSC"), a wholly owned subsidiary of MFS,
serves as shareholder servicing agent to the MFS Funds, the MFS Closed-End
Funds, MFSIT, MVI and UST.

         MFS Asset Management, Inc. ("AMI"), a wholly owned subsidiary of MFS,
provides investment advice to substantial private clients.

         MFS Retirement Services, Inc. ("RSI"), a wholly owned subsidiary of
MFS, markets MFS products to retirement plans and provides administrative and
record keeping services for retirement plans.

         MFS

         The Directors of MFS are A. Keith Brodkin, Jeffrey L. Shames, Arnold
D. Scott, John R. Gardner and John D. McNeil.  Mr. Brodkin is the Chairman,
Mr. Shames is the President, Mr. Scott is a Senior Executive Vice President
and Secretary, Bruce C. Avery, William S. Harris, William W. Scott, Jr., and
Patricia A. Zlotin are Executive Vice Presidents, Stephen E. Cavan is a Senior
Vice President, General Counsel and an Assistant Secretary, Joseph W. Dello
Russo is a Senior Vice President, Chief Financial Officer and Treasurer,
Robert T. Burns is a Vice President, Associate General Counsel and an
Assistant Secretary of MFS, and Thomas B. Hastings is a Vice President and
Assistant Treasurer.

         Massachusetts Investors Trust
         Massachusetts Investors Growth Stock Fund
         MFS Growth Opportunities Fund
         MFS Government Securities Fund
         MFS Series Trust I
         MFS Series Trust V
         MFS Series Trust VI
         MFS Series Trust X
         MFS Government Limited Maturity Fund

         A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is
the Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice
President of MFS, is the Assistant Treasurer, James R. Bordewick, Jr., Vice
President and Associate General Counsel of MFS, is the Assistant Secretary.
    
<PAGE>
   
         MFS Series Trust II

         A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg,
Senior Vice President of MFS, is a Vice President, Stephen E. Cavan is the
Secretary, W. Thomas London is the Treasurer, James O. Yost is the Assistant
Treasurer, and James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Government Markets Income Trust
         MFS Intermediate Income Trust

         A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin,
Executive Vice President of MFS and Leslie J. Nanberg, Senior Vice President
of MFS, are Vice Presidents, Stephen E. Cavan is the Secretary, W. Thomas
London is the Treasurer, James O. Yost is the Assistant Treasurer, and James
R. Bordewick, Jr., is the Assistant Secretary.

         MFS Series Trust III

         A. Keith Brodkin is the Chairman and President, James T. Swanson,
Robert J. Manning, Cynthia M. Brown and Joan S. Batchelder, Senior Vice
Presidents of MFS, Bernard Scozzafava, Vice President of MFS, and Matthew
Fontaine, Assistant Vice President of MFS, are Vice Presidents, Sheila
Burns-Magnan and Daniel E. McManus, Assistant Vice Presidents of MFS, are
Assistant Vice Presidents, Stephen E. Cavan is the Secretary, W. Thomas London
is the Treasurer, James O. Yost is the Assistant Treasurer, and James R.
Bordewick, Jr., is the Assistant Secretary.

         MFS Series Trust IV
         MFS Series Trust IX

         A. Keith Brodkin is the Chairman and President, Robert A. Dennis and
Geoffrey L. Kurinsky, Senior Vice Presidents of MFS, are Vice Presidents,
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O.
Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Series Trust VII

         A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg and
Stephen C. Bryant, Senior Vice Presidents of MFS, are Vice Presidents, Stephen
E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O. Yost is
the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Series Trust VIII

         A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames,
Leslie J. Nanberg, Patricia A. Zlotin, James T. Swanson and John D.
Laupheimer, Jr., Vice President of MFS, are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, James O. Yost is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.
    
<PAGE>
   
         MFS Municipal Series Trust

         A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and
Robert A. Dennis are Vice Presidents, David B. Smith, Geoffrey L. Schechter
and David R. King, Vice Presidents of MFS, are Vice Presidents, Daniel E.
McManus, Assistant Vice President of MFS, is an Assistant Vice President,
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O.
Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Variable Insurance Trust
         MFS Union Standard Trust
         MFS Institutional Trust

         A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is
the Secretary, W. Thomas London is the Treasurer, James O. Yost is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Municipal Income Trust

         A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and
Robert J. Manning are Vice Presidents, Stephen E. Cavan is the Secretary, W.
Thomas London is the Treasurer, James O. Yost, is the Assistant Treasurer and
James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Multimarket Income Trust
         MFS Charter Income Trust

         A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin,
Leslie J. Nanberg and James T. Swanson are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice
President of MFS, is the Assistant Treasurer and James R. Bordewick, Jr., is
the Assistant Secretary.

         MFS Special Value Trust

         A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames,
Patricia A. Zlotin and Robert J. Manning are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, and James O. Yost, is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

         SGVAF

         W. Thomas London is the Treasurer.

         MIL

         A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott and
Jeffrey L. Shames are Directors, Ziad Malek, Senior Vice President of MFS, is
the President, Thomas J. Cashman, Jr., a Senior Vice President of MFS, is a
Senior Vice President, Stephen E. Cavan is a Director, Senior Vice President
and the Clerk, James R. Bordewick, Jr. is a Director, Vice
    
<PAGE>
   
President and an Assistant Clerk,  Robert T. Burns is an Assistant Clerk, Joseph
W.  Dello  Russo is the  Treasurer  and  Thomas  B.  Hastings  is the  Assistant
Treasurer.

         MIL-UK

         A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott,
Jeffrey L. Shames, and James R. Bordewick, Jr., are Directors, Stephen E.
Cavan is a Director and the Secretary, Ziad Malek is the President, James E.
Russell is the Treasurer, and Robert T. Burns is the Assistant Secretary.

         MIL Funds

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle, Richard W. S. Baker and William F. Waters are
Directors, Stephen E. Cavan is the Secretary, W. Thomas London is the
Treasurer, James O. Yost is the Assistant Treasurer and James R. Bordewick,
Jr., is the Assistant Secretary, and Ziad Malek is a Senior Vice President.

         MFS Meridian Funds

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle, Richard W. S. Baker, Arnold D. Scott, Jeffrey L.
Shames and William F. Waters are Directors, Stephen E. Cavan is the Secretary,
W. Thomas London is the Treasurer, James R. Bordewick, Jr., is the Assistant
Secretary, James O. Yost is the Assistant Treasurer, and Ziad Malek is a
Senior Vice President.

         MFD

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, William W. Scott, Jr., an Executive Vice
President of MFS, is the President, Stephen E. Cavan is the Secretary, Robert
T. Burns is the Assistant Secretary, Joseph W. Dello Russo is the Treasurer,
and Thomas B. Hastings is the Assistant Treasurer.

         CIAI

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, Cynthia Orcott is President, Bruce C. Avery
is the Vice President, Joseph W. Dello Russo is the Treasurer, Thomas B.
Hastings is the Assistant Treasurer, Stephen E. Cavan is the Secretary, and
Robert T. Burns is the Assistant Secretary.

         MFSC

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, Joseph A. Recomendes, a Senior Vice President
of MFS, is Vice Chairman and a Director, Janet A. Clifford is the Executive
Vice President, Joseph W. Dello Russo is the Treasurer, Thomas B. Hastings is
the Assistant Treasurer, Stephen E. Cavan is the Secretary, and Robert T.
Burns is the Assistant Secretary.
    
<PAGE>
   
         AMI

         A. Keith Brodkin is the Chairman and a Director, Jeffrey L. Shames,
and Arnold D. Scott are Directors, Thomas J. Cashman, Jr., is the President
and a Director, Leslie J. Nanberg is a Senior Vice President, a Managing
Director and a Director, George F. Bennett, Carol A. Corley, John A. Gee,
Brianne Grady and Kevin R. Parke  are Senior Vice Presidents and Managing
Directors, Joseph W. Dello Russo is the Treasurer, Thomas B. Hastings is the
Assistant Treasurer and Robert T. Burns is the Secretary.

         RSI

         William W. Scott, Jr. and Bruce C. Avery are Directors, Arnold D.
Scott is the Chairman and a Director, Joseph W. Dello Russo is the Treasurer,
Thomas B. Hastings is the Assistant Treasurer, Stephen E. Cavan is the
Secretary, Robert T. Burns is the Assistant Secretary and Sharon A. Brovelli
and Martin E. Beaulieu are Senior Vice Presidents.

         In addition, the following persons,  Directors or officers of MFS, have
the affiliations indicated:

         A. Keith Brodkin           Director, Sun Life Assurance Company
                                    of Canada (U.S.), One Sun Life
                                    Executive Park, Wellesley Hills,
                                    Massachusetts
                                    Director, Sun Life Insurance and Annuity
                                    Company of New York, 67 Broad Street,
                                    New York, New York

         John                       R.  Gardner  President  and a Director,  Sun
                                    Life Assurance  Company of Canada,  Sun Life
                                    Centre,  150  King  Street  West,   Toronto,
                                    Ontario,  Canada  (Mr.  Gardner  is  also an
                                    officer    and/or    Director   of   various
                                    subsidiaries and affiliates of Sun Life)

         John D. McNeil             Chairman, Sun Life Assurance
                                    Company of Canada, Sun Life Centre,
                                    150 King Street West, Toronto, Ontario,
                                    Canada (Mr. McNeil is also an officer
                                    and/or Director of various subsidiaries
                                    and affiliates of Sun Life)

         Joseph W. Dello Russo      Director of Mutual Fund Operations, The
                                    Boston Company, Exchange Place,
                                    Boston, Massachusetts (until August,
                                    1994)
    
Item 29. Distributors

         (a) Reference is hereby made to Item 28 above.

         (b) Reference is hereby made to Item 28 above;  the principal  business
address of each of these persons is 500 Boylston Street,  Boston,  Massachusetts
02116.
<PAGE>

         (c) Not applicable.

Item 30. Location of Accounts and Records

         The accounts and records of the Registrant are located,  in whole or in
part, at the office of the Registrant at the following locations:

                  NAME                                   ADDRESS

         Massachusetts Financial Services            500 Boylston Street
         Company (investment adviser)                Boston, MA 02116

         MFS Funds Distributors, Inc.                500 Boylston Street
         (principal underwriter)                     Boston, MA 02116

         State Street Bank and Trust Company         State Street South
         (custodian)                                 5 - West
                                                     North Quincy, MA 02171

         MFS Service Center, Inc.                    500 Boylston Street
         (transfer agent)                            Boston, MA 02116

Item 31. Management Services

         Not Applicable.


Item 32. Undertakings

         (a)  Not applicable.

         (b)  Not applicable.

         (c)  Registrant  undertakes to furnish each person to whom a prospectus
is  delivered  with a copy of its  latest  annual  report to  shareholders  upon
request and without charge.

         (d)  Insofar  as  indemnification   for  liability  arising  under  the
Securities  Act of 1933 may be permitted to trustees,  officers and  controlling
persons of the  Registrant  pursuant to the  provisions  set forth in Item 27 of
this Part C, or otherwise,  the  Registrant has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Act and is,  therefore,  unenforceable.  In the event
that a claim  for  indemnification  against  such  liabilities  (other  than the
payment by the Registrant of expenses incurred or paid by a trustee,  officer or
controlling  person of the Registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling person
in connection with the Securities being Registered,  the Registrant will, unless
in the  opinion  of its  counsel  the matter  has been  settled  by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.
<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 of
the requirements for  effectiveness of this Registration  Statement  pursuant to
Rule  485(b)  under  the  Securities  Act of  1933  and  has  duly  caused  this
Post-Effective  Amendment  to the  Registration  Statement  to be  signed on its
behalf by the undersigned,  thereto duly  authorized,  in the City of Boston and
The Commonwealth of Massachusetts on the 28th day of May, 1996.

                                              MFS SERIES TRUST X


                                    By:     JAMES R. BORDEWICK, JR.
                                    Name:   James R. Bordewick, Jr.
                                    Title:  Assistant Secretary

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Post-Effective  Amendment to its Registration Statement has been signed below by
the following persons in the capacities indicated on May 28, 1996.

         SIGNATURE                                   TITLE


A. KEITH BRODKIN*                  Chairman, President (Principal Executive
A. Keith Brodkin                   Officer) and Trustee


W. THOMAS LONDON*                  Treasurer (Principal Financial Officer
W. Thomas London                   and Principal Accounting Officer)


RICHARD B. BAILEY*                 Trustee
Richard B. Bailey


PETER G. HARWOOD*                  Trustee
Peter G. Harwood


J. ATWOOD IVES*                    Trustee
J. Atwood Ives


<PAGE>
LAWRENCE T. PERERA*                Trustee
Lawrence T. Perera


WILLIAM J. POORVU*                 Trustee
William J. Poorvu


CHARLES W. SCHMIDT*                Trustee
Charles W. Schmidt


ARNOLD D. SCOTT*                   Trustee
Arnold D. Scott


JEFFREY L. SHAMES*                 Trustee
Jeffrey L. Shames


ELAINE R. SMITH*                   Trustee
Elaine R. Smith


DAVID B. STONE*                    Trustee
David B. Stone


                                    *By:    JAMES R. BORDEWICK, JR.
                                    Name:   James R. Bordewick, Jr.
                                            as Attorney-in-fact

                                    Executed by James R. Bordewick, Jr. on
                                    behalf of those indicated pursuant to a
                                    Power of Attorney dated September 21,
                                    1994, incorporated by reference to the
                                    Registrant's Post-Effective Amendment
                                    No. 11 filed with the Securities and
                                    Exchange Commission on
                                    March 30, 1995.

<PAGE>
                               INDEX TO EXHIBITS


EXHIBIT NO.               DESCRIPTION OF EXHIBIT

 1 (c)           Amendment to the Declaration of Trust -
                 Designation of Class, dated May 15, 1996.

 9 (b)           Form of Amendment to the Shareholder Servicing
                 Agreement.

15 (i)           Form of Distribution Plan for Class C shares of
                 MFS/Foreign & Colonial International Growth
                 Fund.

    (j)          Form of Distribution Plan for Class C shares of
                 MFS/Foreign & Colonial International Growth and
                 Income Fund.

    (k)          Form of Distribution Plan for Class C shares of
                 MFS/Foreign & Colonial Emerging Markets Equity
                 Fund.
<PAGE>

<PAGE>

                                                        EXHIBIT NO. 99.1(c)


                               MFS SERIES TRUST X


                           CERTIFICATION OF AMENDMENT
                          TO THE DECLARATION OF TRUST

                         ESTABLISHMENT AND DESIGNATION
                                   OF CLASSES


         The undersigned, being a majority of the Trustees of MFS Series Trust X
(the "Trust"),  a business trust organized under the laws of The Commonwealth of
Massachusetts  pursuant to an Amended and  Restated  Declaration  of Trust dated
January 18, 1995,  as amended (the  "Declaration"),  acting  pursuant to Section
6.10 of the  Declaration,  do hereby divide the shares of each of  MFS/Foreign &
Colonial  Emerging  Markets  Equity Fund,  MFS/Foreign & Colonial  International
Growth and Income  Fund and  MFS/Foreign  & Colonial  International  Growth Fund
(each a  "Series"),  each of  which is a  series  of the  Trust,  to  create  an
additional class of shares, within the meaning of Section 6.10, as follows:

         1. The additional class of shares is designated "Class C Shares";

         2. Class C Shares shall be entitled to all the rights and
preferences accorded to shares under the Declaration;

         3. The purchase price of Class C Shares, the method of determination of
the net asset value of Class C Shares, the price, terms and manner of redemption
of Class C Shares, and the relative dividend rights of holders of Class C Shares
shall  be  established  by the  Trustees  of the  Trust in  accordance  with the
Declaration  and shall be set forth in the current  prospectus  and statement of
additional  information of the Trust or any series thereof, as amended from time
to time,  contained in the Trust's  registration  statement under the Securities
Act of 1933, as amended;

         4. Class C Shares  shall vote  together as a single  class  except that
Shares of a class may vote  separately on matters  affecting only that class and
Shares of a class not affected by a matter will not vote on that matter; and

         5. A class of Shares of any series of the Trust may be
terminated by the Trustees by written notice to the Shareholders of the class.
<PAGE>

         IN  WITNESS  WHEREOF,  a  majority  of the  Trustees  of the Trust have
executed this amendment, in one or more counterparts,  all constituting a single
instrument, as an instrument under seal in The Commonwealth of Massachusetts, as
of this15th day of May, 1996.



A. KEITH BRODKIN                    CHARLES W. SCHMIDT
A. Keith Brodkin                    Charles W. Schmidt
76 Farm Road                        63 Claypit Hill Road
Sherborn, MA  01770                 Wayland, MA  01778



RICHARD B. BAILEY                   ARNOLD D. SCOTT
Richard B. Bailey                   Arnold D. Scott
63 Atlantic Avenue                  20 Rowes Wharf
Boston, MA  02110                   Boston, MA  02110



PETER G. HARWOOD                    JEFFREY L. SHAMES
Peter G. Harwood                    Jeffrey L. Shames
211 Lindsay Pond Road               60 Brookside Road
Concord, MA  01742                  Needham, MA  02192



J. ATWOOD IVES                      ELAINE R. SMITH
J. Atwood Ives                      Elaine R. Smith
1 Bennington Road                   75 Scotch Pine Road
Lexington, MA  02173                Weston, MA  02193



LAWRENCE T. PERERA                  DAVID B. STONE
Lawrence T. Perera                  David B. Stone
18 Marlborough Street               282 Beacon Street
Boston, MA  02116                   Boston, MA  02116



WILLIAM J. POORVU
William J. Poorvu
975 Memorial Drive
Cambridge, MA  02138
<PAGE>

<PAGE>

                                                           EXHIBIT NO. 99.9(b)


                               MFS SERIES TRUST X

                500 BOYLSTON o BOSTON o MASSACHUSETTS 02116-3741
                                (617) o 954-5000





                                            June 28, 1996



MFS Service Center, Inc.
500 Boylston Street
Boston, MA  02116

Dear Sir/Madam:

         This will confirm our  understanding  that Exhibit B to the Shareholder
Servicing  Agent Agreement  between us, dated September 1, 1995, as amended,  is
hereby amended,  effective immediately,  to read in its entirety as set forth on
Attachment 1 hereto.

         Please indicate your acceptance of the foregoing by signing below.

                                            Sincerely,

                                            MFS Series Trust X




                                            By:
                                                 W. Thomas London
                                                 Treasurer



Accepted and Agreed:

MFS SERVICE CENTER, INC.




By:
         Joseph W. Dello Russo
         Treasurer
<PAGE>
                                                               ATTACHMENT 1
                                                               June 28, 1996




                          EXHIBIT B TO THE SHAREHOLDER
                       SERVICING AGENT AGREEMENT BETWEEN
                       MFS SERVICE CENTER, INC. ("MFSC")
                     AND MFS SERIES TRUST VII (the "Fund")




1. The fees to be paid by the Fund on behalf of its series with respect to Class
A shares of each series of the Fund to MFSC, for MFSC's  services as shareholder
servicing agent, shall be:

         0.15% of the first $500 million of the assets of the series
attributable to such class;
         0.12% of the second $500 million of the assets of the series
attributable to such class;
         0.09% over $1 billion of the assets of the series attributable to
such class.


2. The fees to be paid by the Fund on behalf of its series with respect to Class
B shares of each series of the Fund to MFSC, for MFSC's  services as shareholder
servicing agent, shall be:

         0.22% of the first $500 million of the assets of the series
attributable to such class;
         0.18% of the second $500 million of the assets of the series
attributable to such class;
         0.13% over $1 billion of the assets of the series attributable to
such class.


3. The fees to be paid by the Fund on behalf of its series with respect to Class
C shares of each series of the Fund to MFSC, for MFSC's  services as shareholder
servicing agent, shall be:

         0.15% of the first $500 million of the assets of the series
attributable to such class;
         0.12% of the second $500 million of the assets of the series
attributable to such class;
         0.09% over $1 billion of the assets of the series attributable to
such class.
<PAGE>

<PAGE>

                                                            EXHIBIT NO. 99.15(i)

                               MFS SERIES TRUST X

                MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND

                              PLAN OF DISTRIBUTION


PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated  "Class C" of MFS/Foreign & Colonial  International  Growth Fund (the
"Fund"),  a series of MFS Series Trust X (the "Trust") a Massachusetts  business
trust, dated May 15, 1996.

                                  WITNESSETH:


         WHEREAS,  the Trust is engaged in business  as an  open-end  management
investment  company and is registered under the Investment  Company Act of 1940,
as amended (collectively with the rules and regulations  promulgated thereunder,
the "1940 Act"); and

         WHEREAS,  the Trust  intends to  distribute  the  shares of  beneficial
interest  (without  par  value)  of the  Fund  designated  Class B  Shares  (the
"Shares") in accordance with Rule 12b-1 under the 1940 Act ("Rule  12b-1"),  and
desires to adopt this  Distribution  Plan (the "Plan") as a plan of distribution
pursuant to such Rule; and

         WHEREAS, the Trust desires for MFS Fund Distributors,  Inc., a Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

         WHEREAS,  the Trust has  entered  into a  distribution  agreement  (the
"Distribution  Agreement")  (in a form  approved by the Board of Trustees of the
Trust in a manner  specified in such Rule 12b-1) with the  Distributor,  whereby
the Distributor will provide facilities and personnel and render services to the
Fund in connection with the offering and distribution of the Shares; and

         WHEREAS,  the Trust  recognizes and agrees that (a) the Distributor may
retain the services of firms or individuals to act as dealers (the "Dealers") of
the Shares in connection  with the offering of Shares,  and (b) the  Distributor
may make  payments  for such  services to the Dealers out of the fee paid to the
Distributor hereunder,  any deferred sales charges imposed by the Distributor in
connection  with the  repurchase  of Shares,  its  profits  or any other  source
available to it; and

         WHEREAS,  the Trust  recognizes  and agrees  that the  Distributor  may
impose  certain  deferred  sales  charges in connection  with the  repurchase of
Shares by the Fund, and the Distributor may retain (or receive from the Fund, as
the case may be) all such deferred sales charges; and

         WHEREAS, the Board of Trustees of the Trust, in considering whether the
Fund should adopt and implement this Plan, has evaluated such  information as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;
<PAGE>

         NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this
Plan  for  the  Fund  as a plan  for  distribution  relating  to the  Shares  in
accordance with Rule 12b-1, on the following terms and conditions:

         1. As specified in the Distribution  Agreement,  the Distributor  shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares.  Among other things,  the  Distributor  shall be responsible for
commissions payable to Dealers, all expenses of printing (excluding typesetting)
and  distributing  prospectuses to prospective  shareholders  and providing such
other related services as are reasonably necessary in connection therewith.

         2. The Distributor shall bear all distribution-related  expenses to the
extent  specified  in the  Distribution  Agreement  in  providing  the  services
described in paragraph 1, including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3. It is understood that the  Distributor  may impose certain  deferred
sales  charges in connection  with the  repurchase of Shares by the Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the Shares.

         4. As partial  consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations under its dealer agreement with the Distributor,  the Fund shall pay
each Dealer a service fee  periodically  at a rate not to exceed 0.25% per annum
of the portion of the average  daily net assets of the Fund that is  represented
by Shares  that are owned by  investors  for whom such  Dealer is the  holder or
dealer of record.  That portion of the Fund's  average daily net assets on which
the fees payable under this  paragraph 4 hereof are calculated may be subject to
certain  minimum amount  requirements  as may be  determined,  and additional or
different  dealer  qualification  standards that may be established from time to
time, by the Distributor.  The Distributor shall be entitled to be paid any fees
payable under this paragraph 4 hereof with respect to Shares for which no Dealer
of  record  exists  or  qualification  standards  have not  been met as  partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The  service  fee payable  pursuant to this
paragraph 4 may from time to time be paid by the Fund to the Distributor and the
Distributor will then pay these fees on behalf of the Fund.

         5. The Fund understands that agreements between the Distributor and the
Dealers may provide for payment of commissions to Dealers in connection with the
sales of Shares and may provide for a portion (which may be all or substantially
all) of the fees payable by the Fund to the Distributor  under the  Distribution
Agreement to be paid by the Distributor to the Dealers in  consideration  of the
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

         6. The Fund shall pay all fees and expenses of any independent auditor,
legal counsel,  investment adviser,  administrator,  transfer agent,  custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,
<PAGE>
shareholder  reports,  notices,  proxy  statements  and reports to  governmental
officers  and  commissions  and to  shareholders  of the Fund,  except  that the
Distributor  shall  be  responsible  for the  distribution-related  expenses  as
provided in paragraphs 1 and 2 hereof.

         7.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         8. This Plan shall become  effective  upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the Board of  Trustees  and a vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest in the  operation of the Plan or in any  agreement
related to the Plan (the "Qualified Trustees"),  such votes to be cast in person
at a meeting called for the purpose of voting on this Plan.

         9. This Plan shall continue in effect indefinitely;  provided that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

         10.  This Plan may be  amended  at any time by the  Board of  Trustees;
provided that this Plan may not be amended to increase  materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

         11. The Fund and the  Distributor  shall provide the Board of Trustees,
and the Board of Trustees shall review, at least quarterly,  a written report of
the  amounts   expended  under  this  Plan  and  the  purposes  for  which  such
expenditures were made.

         12.      While this Plan is in effect, the selection and nomination
of Qualified Trustees shall be committed to the discretion of the Trustees who
are not "interested persons" of the Trust.

         13. For the  purposes  of this Plan,  the terms  "interested  persons",
"majority of the outstanding  voting  securities" and "specifically  approved at
least  annually" are used as defined in the 1940 Act. In addition,  for purposes
of determining the fees payable to the Distributor  hereunder,  the value of the
Fund's net  assets  shall be  computed  in the  manner  specified  in the Fund's
then-current  prospectus and statement of additional information for computation
of the net asset value of the Shares of the Fund.

         14. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report referred to in paragraph 11 hereof (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  record  shall be kept in an easily
accessible place for the first two years of said record-keeping.

         15.      This Plan shall be construed in accordance with the laws of
The Commonwealth of Massachusetts and the applicable provisions of the 1940
Act.

         16. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.
<PAGE>

<PAGE>

                                                           EXHIBIT NO. 99.15(j)


                               MFS SERIES TRUST X

          MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND

                              PLAN OF DISTRIBUTION


PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated "Class C" of MFS/Foreign & Colonial  International  Growth and Income
Fund (the "Fund"),  a series of MFS Series Trust X (the "Trust") a Massachusetts
business trust, dated May 15, 1996.

                                  WITNESSETH:


         WHEREAS,  the Trust is engaged in business  as an  open-end  management
investment  company and is registered under the Investment  Company Act of 1940,
as amended (collectively with the rules and regulations  promulgated thereunder,
the "1940 Act"); and

         WHEREAS,  the Trust  intends to  distribute  the  shares of  beneficial
interest  (without  par  value)  of the  Fund  designated  Class B  Shares  (the
"Shares") in accordance with Rule 12b-1 under the 1940 Act ("Rule  12b-1"),  and
desires to adopt this  Distribution  Plan (the "Plan") as a plan of distribution
pursuant to such Rule; and

         WHEREAS, the Trust desires for MFS Fund Distributors,  Inc., a Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

         WHEREAS,  the Trust has  entered  into a  distribution  agreement  (the
"Distribution  Agreement")  (in a form  approved by the Board of Trustees of the
Trust in a manner  specified in such Rule 12b-1) with the  Distributor,  whereby
the Distributor will provide facilities and personnel and render services to the
Fund in connection with the offering and distribution of the Shares; and

         WHEREAS,  the Trust  recognizes and agrees that (a) the Distributor may
retain the services of firms or individuals to act as dealers (the "Dealers") of
the Shares in connection  with the offering of Shares,  and (b) the  Distributor
may make  payments  for such  services to the Dealers out of the fee paid to the
Distributor hereunder,  any deferred sales charges imposed by the Distributor in
connection  with the  repurchase  of Shares,  its  profits  or any other  source
available to it; and

         WHEREAS,  the Trust  recognizes  and agrees  that the  Distributor  may
impose  certain  deferred  sales  charges in connection  with the  repurchase of
Shares by the Fund, and the Distributor may retain (or receive from the Fund, as
the case may be) all such deferred sales charges; and

         WHEREAS, the Board of Trustees of the Trust, in considering whether the
Fund should adopt and implement this Plan, has evaluated such  information as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;
<PAGE>

         NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this
Plan  for  the  Fund  as a plan  for  distribution  relating  to the  Shares  in
accordance with Rule 12b-1, on the following terms and conditions:

         1. As specified in the Distribution  Agreement,  the Distributor  shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares.  Among other things,  the  Distributor  shall be responsible for
commissions payable to Dealers, all expenses of printing (excluding typesetting)
and  distributing  prospectuses to prospective  shareholders  and providing such
other related services as are reasonably necessary in connection therewith.

         2. The Distributor shall bear all distribution-related  expenses to the
extent  specified  in the  Distribution  Agreement  in  providing  the  services
described in paragraph 1, including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3. It is understood that the  Distributor  may impose certain  deferred
sales  charges in connection  with the  repurchase of Shares by the Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the Shares.

         4. As partial  consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations under its dealer agreement with the Distributor,  the Fund shall pay
each Dealer a service fee  periodically  at a rate not to exceed 0.25% per annum
of the portion of the average  daily net assets of the Fund that is  represented
by Shares  that are owned by  investors  for whom such  Dealer is the  holder or
dealer of record.  That portion of the Fund's  average daily net assets on which
the fees payable under this  paragraph 4 hereof are calculated may be subject to
certain  minimum amount  requirements  as may be  determined,  and additional or
different  dealer  qualification  standards that may be established from time to
time, by the Distributor.  The Distributor shall be entitled to be paid any fees
payable under this paragraph 4 hereof with respect to Shares for which no Dealer
of  record  exists  or  qualification  standards  have not  been met as  partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The  service  fee payable  pursuant to this
paragraph 4 may from time to time be paid by the Fund to the Distributor and the
Distributor will then pay these fees on behalf of the Fund.

         5. The Fund understands that agreements between the Distributor and the
Dealers may provide for payment of commissions to Dealers in connection with the
sales of Shares and may provide for a portion (which may be all or substantially
all) of the fees payable by the Fund to the Distributor  under the  Distribution
Agreement to be paid by the Distributor to the Dealers in  consideration  of the
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

         6. The Fund shall pay all fees and expenses of any independent auditor,
legal counsel,  investment adviser,  administrator,  transfer agent,  custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,
<PAGE>
shareholder  reports,  notices,  proxy  statements  and reports to  governmental
officers  and  commissions  and to  shareholders  of the Fund,  except  that the
Distributor  shall  be  responsible  for the  distribution-related  expenses  as
provided in paragraphs 1 and 2 hereof.

         7.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         8. This Plan shall become  effective  upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the Board of  Trustees  and a vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest in the  operation of the Plan or in any  agreement
related to the Plan (the "Qualified Trustees"),  such votes to be cast in person
at a meeting called for the purpose of voting on this Plan.

         9. This Plan shall continue in effect indefinitely;  provided that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

         10.  This Plan may be  amended  at any time by the  Board of  Trustees;
provided that this Plan may not be amended to increase  materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

         11. The Fund and the  Distributor  shall provide the Board of Trustees,
and the Board of Trustees shall review, at least quarterly,  a written report of
the  amounts   expended  under  this  Plan  and  the  purposes  for  which  such
expenditures were made.

         12.      While this Plan is in effect, the selection and nomination
of Qualified Trustees shall be committed to the discretion of the Trustees who
are not "interested persons" of the Trust.

         13. For the  purposes  of this Plan,  the terms  "interested  persons",
"majority of the outstanding  voting  securities" and "specifically  approved at
least  annually" are used as defined in the 1940 Act. In addition,  for purposes
of determining the fees payable to the Distributor  hereunder,  the value of the
Fund's net  assets  shall be  computed  in the  manner  specified  in the Fund's
then-current  prospectus and statement of additional information for computation
of the net asset value of the Shares of the Fund.

         14. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report referred to in paragraph 11 hereof (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  record  shall be kept in an easily
accessible place for the first two years of said record-keeping.

         15.      This Plan shall be construed in accordance with the laws of
The Commonwealth of Massachusetts and the applicable provisions of the 1940
Act.

         16. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.
<PAGE>

<PAGE>

                                                          EXHIBIT NO. 99.15(k)


                               MFS SERIES TRUST X

              MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND

                              PLAN OF DISTRIBUTION


PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated "Class C" of MFS/Foreign & Colonial Emerging Markets Equity Fund (the
"Fund"),  a series of MFS Series Trust X (the "Trust") a Massachusetts  business
trust, dated May 15, 1996.

                                  WITNESSETH:


         WHEREAS,  the Trust is engaged in business  as an  open-end  management
investment  company and is registered under the Investment  Company Act of 1940,
as amended (collectively with the rules and regulations  promulgated thereunder,
the "1940 Act"); and

         WHEREAS,  the Trust  intends to  distribute  the  shares of  beneficial
interest  (without  par  value)  of the  Fund  designated  Class B  Shares  (the
"Shares") in accordance with Rule 12b-1 under the 1940 Act ("Rule  12b-1"),  and
desires to adopt this  Distribution  Plan (the "Plan") as a plan of distribution
pursuant to such Rule; and

         WHEREAS, the Trust desires for MFS Fund Distributors,  Inc., a Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

         WHEREAS,  the Trust has  entered  into a  distribution  agreement  (the
"Distribution  Agreement")  (in a form  approved by the Board of Trustees of the
Trust in a manner  specified in such Rule 12b-1) with the  Distributor,  whereby
the Distributor will provide facilities and personnel and render services to the
Fund in connection with the offering and distribution of the Shares; and

         WHEREAS,  the Trust  recognizes and agrees that (a) the Distributor may
retain the services of firms or individuals to act as dealers (the "Dealers") of
the Shares in connection  with the offering of Shares,  and (b) the  Distributor
may make  payments  for such  services to the Dealers out of the fee paid to the
Distributor hereunder,  any deferred sales charges imposed by the Distributor in
connection  with the  repurchase  of Shares,  its  profits  or any other  source
available to it; and

         WHEREAS,  the Trust  recognizes  and agrees  that the  Distributor  may
impose  certain  deferred  sales  charges in connection  with the  repurchase of
Shares by the Fund, and the Distributor may retain (or receive from the Fund, as
the case may be) all such deferred sales charges; and

         WHEREAS, the Board of Trustees of the Trust, in considering whether the
Fund should adopt and implement this Plan, has evaluated such  information as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;
<PAGE>

         NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this
Plan  for  the  Fund  as a plan  for  distribution  relating  to the  Shares  in
accordance with Rule 12b-1, on the following terms and conditions:

         1. As specified in the Distribution  Agreement,  the Distributor  shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares.  Among other things,  the  Distributor  shall be responsible for
commissions payable to Dealers, all expenses of printing (excluding typesetting)
and  distributing  prospectuses to prospective  shareholders  and providing such
other related services as are reasonably necessary in connection therewith.

         2. The Distributor shall bear all distribution-related  expenses to the
extent  specified  in the  Distribution  Agreement  in  providing  the  services
described in paragraph 1, including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3. It is understood that the  Distributor  may impose certain  deferred
sales  charges in connection  with the  repurchase of Shares by the Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the Shares.

         4. As partial  consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations under its dealer agreement with the Distributor,  the Fund shall pay
each Dealer a service fee  periodically  at a rate not to exceed 0.25% per annum
of the portion of the average  daily net assets of the Fund that is  represented
by Shares  that are owned by  investors  for whom such  Dealer is the  holder or
dealer of record.  That portion of the Fund's  average daily net assets on which
the fees payable under this  paragraph 4 hereof are calculated may be subject to
certain  minimum amount  requirements  as may be  determined,  and additional or
different  dealer  qualification  standards that may be established from time to
time, by the Distributor.  The Distributor shall be entitled to be paid any fees
payable under this paragraph 4 hereof with respect to Shares for which no Dealer
of  record  exists  or  qualification  standards  have not  been met as  partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The  service  fee payable  pursuant to this
paragraph 4 may from time to time be paid by the Fund to the Distributor and the
Distributor will then pay these fees on behalf of the Fund.

         5. The Fund understands that agreements between the Distributor and the
Dealers may provide for payment of commissions to Dealers in connection with the
sales of Shares and may provide for a portion (which may be all or substantially
all) of the fees payable by the Fund to the Distributor  under the  Distribution
Agreement to be paid by the Distributor to the Dealers in  consideration  of the
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

         6. The Fund shall pay all fees and expenses of any independent auditor,
legal counsel,  investment adviser,  administrator,  transfer agent,  custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,
<PAGE>
shareholder  reports,  notices,  proxy  statements  and reports to  governmental
officers  and  commissions  and to  shareholders  of the Fund,  except  that the
Distributor  shall  be  responsible  for the  distribution-related  expenses  as
provided in paragraphs 1 and 2 hereof.

         7.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         8. This Plan shall become  effective  upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the Board of  Trustees  and a vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest in the  operation of the Plan or in any  agreement
related to the Plan (the "Qualified Trustees"),  such votes to be cast in person
at a meeting called for the purpose of voting on this Plan.

         9. This Plan shall continue in effect indefinitely;  provided that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

         10.  This Plan may be  amended  at any time by the  Board of  Trustees;
provided that this Plan may not be amended to increase  materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

         11. The Fund and the  Distributor  shall provide the Board of Trustees,
and the Board of Trustees shall review, at least quarterly,  a written report of
the  amounts   expended  under  this  Plan  and  the  purposes  for  which  such
expenditures were made.

         12.      While this Plan is in effect, the selection and nomination
of Qualified Trustees shall be committed to the discretion of the Trustees who
are not "interested persons" of the Trust.

         13. For the  purposes  of this Plan,  the terms  "interested  persons",
"majority of the outstanding  voting  securities" and "specifically  approved at
least  annually" are used as defined in the 1940 Act. In addition,  for purposes
of determining the fees payable to the Distributor  hereunder,  the value of the
Fund's net  assets  shall be  computed  in the  manner  specified  in the Fund's
then-current  prospectus and statement of additional information for computation
of the net asset value of the Shares of the Fund.

         14. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report referred to in paragraph 11 hereof (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  record  shall be kept in an easily
accessible place for the first two years of said record-keeping.

         15.      This Plan shall be construed in accordance with the laws of
The Commonwealth of Massachusetts and the applicable provisions of the 1940
Act.

         16. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.
<PAGE>


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