EXHIBIT 10.15
                             BOSTON BIOMEDICA, INC.

                      1987 NON-QUALIFIED STOCK OPTION PLAN

                         [REVISED AS OF JULY 23, 1993]

        1.  Purpose.  This 1987  Non-Qualified  Stock Option Plan is intended to
provide an opportunity to employees,  officers, directors and consultants now or
hereafter  employed  by or  affiliated  with  the  Corporation  or  any  of  its
Subsidiaries  to  acquire  stock  in  the  Corporation,   to  provide  increased
incentives to such persons to promote the success of the Corporation's  business
and to encourage such persons to become affiliated with the Corporation  through
the granting of options to acquire its capital stock.

        2.  Definitions.  As used  herein,  the  following  terms  will have the
indicated meaning:

        "Committee"  means the  Committee of the Board of Directors as described
in Section 4.

        "Corporation" means Boston Biomedica, Inc., a Massachusetts Corporation.

        "Fair  Market  Value"  means the fair market value of the Stock or other
asset, as reasonably  determined in good faith by the Committee,  on the date as
of which Fair Market Value is determined.

        "Option" means the  contractual  right to purchase  shares of Stock upon
specified terms pursuant to this Plan.

        "Plan" means this Boston Biomedica, Inc. 1987 Non-Qualified Stock Option
Plan.

        "Stock" means the Common  Stock, $.01 par value, of the Corporation.

        "Subsidiary"  means any corporation in an unbroken chain of corporations
beginning with the Corporation  if, at the time of grant of the Option,  each of
the corporations other than the last in the unbroken chain owns stock possessing
50% or more of the total combined voting power of all classes of stock in one of
the other corporations in such chain.

        3. Stock  Subject  to the Plan.  The  aggregate  number of shares of the
Corporation's  Stock  that may be  issued  and  sold  under  the  Plan  shall be
1,795,200 shares. The shares to be issued upon exercise of Options granted under
this Plan shall be made available,  at the discretion of the Board of Directors,
from  (i)

* Increased by Board of Directors in connection with the 20 to 1 stock split in 
  the form of a 19 shares for each share divided effective July  23, 1993.


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Corporation for the purpose,  including  shares  purchased in the authorized but
unissued shares,  (ii) shares previously  reserved for issuance upon exercise of
Options  which have expired or been  terminated,  or (iii)  treasury  shares and
shares  reacquired  by the open market.  If any Option  granted  under this Plan
shall expire or terminate for any reason  without having been exercised in full,
the unpurchased  shares covered  thereby shall become  available for grant under
additional Options under the Plan so long as it shall remain in effect.

        4.      Administration of the Plan.

        (a) The "Plan" shall be  administered  by the  Committee.  The Committee
shall consist of at least one member  appointed by the Board of  Directors,  and
such member shall serve at the pleasure of the Board of Directors.  The Board of
Directors may from time to time appoint  additional  members of the Committee or
remove  members and appoint new  members in  substitution  for those  previously
appointed and fill vacancies  however caused.  A majority of the Committee shall
constitute  a quorum and the acts of a majority  of the  members  present at any
meeting  at  which a quorum  is  present  shall  be  deemed  the  action  of the
Committee.  At such time as any class of equity  security of the  Corporation is
registered  pursuant  to Section 12 of the  Securities  Exchange  Act of 1934 as
amended (the "Exchange  Act"),  (i) the Committee  shall consist of at least two
members of the Board of Directors  and (ii) no member of the  Committee  while a
member  thereof shall be eligible to participate in the Plan, nor may any person
be appointed to the Committee  unless he or she was not eligible to  participate
in the Plan or any other Plan of the Corporation at any time within the one-year
period  immediately  prior  to  such  appointment  as  provided  in  Rule  16b-3
promulgated under the Exchange Act.

        (b) Subject to the express provisions of this Plan and provided that all
actions taken shall be consistent  with the purposes of the Plan,  the Committee
shall have full and complete authority and the sole discretion to: (i) determine
those persons to whom Options shall be granted  under the Plan;  (ii)  determine
the  number of shares  covered  by and the form of the  Options,  if any,  to be
granted,  (iii) determine the time or times when Options shall be granted;  (iv)
establish the terms and  conditions  upon which Options may be exercised  and/or
transferred;  (v) alter any  restrictions or conditions  upon Options;  and (vi)
adopt rules and regulations,  establish, define and/or interpret any other terms
and  conditions,   and  make  all  other  determinations  (which  may  be  on  a
case-by-case  basis) deemed necessary or desirable for the administration of the
Plan.

        (c) In making its  determinations  hereunder,  the Committee  shall take
into  account  the nature of the  services  rendered  or to be  rendered  by the
potential recipients,  their present and potential  contributions to the success
of the Corporation,  and such other factors as the Committee, in its discretion,
shall deem relevant in order to accomplish the purposes of the Plan.

        5.  Eligibility.  Options  will  be  granted  only  to  persons  who are
employees of the  Corporation  or of a Subsidiary or to persons who are officers
or directors of, or consultants or providers of services to, the  Corporation or
a Subsidiary.

        6.      Terms of Options and Limitations Thereon.

        (a) General.  Any Option granted under this Plan shall be evidenced by a
written  agreement  between the  Corporation  and the Option holder and shall be
upon such terms and conditions not inconsistent  with this Plan as the Committee
may determine.



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        (b)  Price.  The  price at which any  shares  of Stock may be  purchased
pursuant to the exercise of an Option shall be determined by the Committee,  but
in no event shall the price be less than the par value of the Stock.

        (c) Period of Option. Each Option granted under this Plan shall continue
in effect for such period as the Committee shall determine.

        (d) Non-Assignability. No Option or right or interest in an Option shall
be  assignable  or  transferable  by the  holder  except  by will or the laws of
descent  and  distribution  and  during  the  lifetime  of the  holder  shall be
exercisable only by him.

        (e) Other Restrictions.  At the discretion of the Committee, any Options
granted may be subject to restrictions on vesting or  transferability or to risk
of forfeiture, any of which may be accelerated or waived in the Committee's sole
discretion.

        7.      Exercise of Options; Payment.

        (a)  Options  may be  exercised  in whole or in part at such time and in
such manner as the  Committee  may  determine  and as shall be prescribed in the
written agreement with each holder.

        (b) The  purchase  price of shares of Stock upon  exercise  of an Option
shall be paid by the  Option  holder in full upon  exercise  and must be paid in
cash.

        (c) At the discretion of the Committee, any Stock issuable upon exercise
of an Option may be subject to restrictions on vesting or  transferability or to
risk of  forfeiture  upon the  happening  of such  events as the  Committee  may
determine,  any of which may be  accelerated or waived in the  Committee's  sole
discretion.

        (d) No shares of Stock shall be issued or  transferred  upon exercise of
any Option under this Plan unless and until all legal requirements applicable to
the  issuance  or transfer  of such  shares and such other  requirements  as are
consistent  with the Plan have been  complied  with to the  satisfaction  of the
Committee, including without limitation those described in Section 11 hereof.

        8.      Stock Adjustments.

        (a) If the  Corporation is a party to any merger or  consolidation,  any
purchase or acquisition of property or stock, or any separation,  reorganization
or  liquidation,  the Board of  Directors  (or,  if the  Corporation  is not the
surviving  corporation,  the Board of  Directors of the  surviving  corporation)
shall  have the power to make  arrangements,  which  shall be  binding  upon the
holders of unexpired  Options,  for the  substitution of new options for, or the
assumption by another  corporation  of, any unexpired  Options then  outstanding
hereunder.



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        (b) If by reason of recapitalization,  reclassification, stock split-up,
combination  of shares,  separation  (including  a spin-off)  or dividend on the
Stock payable in Stock,  the outstanding  shares of Stock of the Corporation are
increased or decreased  or changed into or exchanged  for a different  number or
kind of shares or other  securities of the  Corporation,  the Board of Directors
shall conclusively  determine the appropriate  adjustment in the exercise prices
of  outstanding  Options  and in the  number  and  kind of  shares  as to  which
outstanding Options shall be exercisable.

        (c) In the event of a  transaction  of the type  described in paragraphs
(a) and (b) above,  the total number of shares of Stock on which  Options may be
granted  under  this  Plan  shall  be  appropriately  adjusted  by the  Board of
Directors.

        9.  Termination  of  Affiliation.  The  Committee  may  provide  for the
termination of any Option upon termination of the holder's  affiliation with the
Corporation.

        10. No Rights Other Than Those Expressly  Created.  No person affiliated
with the  Corporation  or any Subsidiary or other person shall have any claim or
right to be granted an Option hereunder.  Neither this Plan nor any action taken
hereunder  shall be  construed  as (i) giving any Option  holder any right to be
retained in the employ of, or continue to be  affiliated  with the  Corporation,
(ii)  giving any Option  holder any equity or interest of any kind in any assets
of the  Corporation,  or  (iii)  creating  a trust  of any  kind or a  fiduciary
relationship of any kind between the Corporation and any such person.  As to any
claim for any unpaid  amounts  under this  Plan,  any person  having a claim for
payments shall be an unsecured creditor.  No Option holder shall have any of the
rights of a  stockholder  with  respect to shares of Stock  covered by an Option
until such time as the Option has been  exercised  and shares of Stock have been
issued to such person.

        11.     Miscellaneous.

        (a) Withholding of Taxes.  Pursuant to applicable Federal,  state, local
or foreign  laws,  the  Corporation  may be required to collect  income or other
taxes upon the grant of an Option to, or exercise of an Option by, a holder. The
Corporation may require,  as a condition to the exercise of an Option,  that the
recipient pay the Corporation,  at such time as the Committee or the Corporation
determines,  the amount of any taxes which the Committee or the  Corporation may
determine is required to be withheld.

        (b) Securities Law  Compliance.  Upon exercise of an Option,  the holder
shall be required to make such  representations  and furnish such information as
may, in the opinion of counsel for the Corporation, be appropriate to permit the
Corporation  to issue or  transfer  the shares of Stock in  compliance  with the
provisions of applicable  Federal or state securities laws. The Corporation,  in
its  discretion,  may postpone the issuance and delivery of shares of Stock upon
any  exercise  of an  Option  until  completion  of such  registration  or other
qualification  of such


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shares  under any  Federal or state  laws,  or stock  exchange  listing,  as the
Corporation  may  consider  appropriate.  The  Corporation  is not  obligated to
register or qualify the shares of Stock under federal or state  securities  laws
and may  refuse to issue  such  shares if  neither  registration  nor  exemption
therefrom is practical.  The Committee may require that prior to the issuance or
transfer of Stock upon exercise of an Option, the recipient enter into a written
agreement to comply with any  restrictions  on subsequent  disposition  that the
Committee or the  Corporation  deems necessary or advisable under any applicable
Federal and state securities laws. Certificates of Stock issued hereunder may be
legended to reflect such restrictions.

        (c) Indemnity. Neither the Board of Directors nor the Committee, nor any
members of either, nor any employees of the Corporation or any Subsidiary, shall
be liable for any act, omission,  interpretation,  construction or determination
made in good faith in connection with their responsibilities with respect to the
Plan, and the Corporation hereby agrees to indemnify the members of the Board of
Directors,  the members of the Committee,  and the employees of the  Corporation
and  its  Subsidiaries  in  respect  of any  claim,  loss,  damage,  or  expense
(including  counsel fees) arising from any such act,  omission,  interpretation,
construction or determination to the full extent permitted by law.

        12.     Effective Date; Amendment; Termination.

        (a) The effective date of this Plan shall be the date of adoption by the
Board of Directors.

        (b) The date of grant of any Option granted  hereunder shall be the date
upon  which  such  Option  shall  be  voted by the  Committee,  unless  the vote
expressly otherwise provides.

        (c) The Board of Directors of the  Corporation may at any time, and from
time to  time,  amend,  suspend  or  terminate  this  Plan in  whole or in part.
However,  except as provided herein, no amendment,  suspension or termination of
this Plan may affect the rights of any person to whom an Option has been granted
without such person's consent.

        (d) This Plan shall  terminate ten (10) years from its  effective  date,
and no Option shall be granted under this Plan thereafter,  but such termination
shall  not  affect  the  validity  of  Options  granted  prior  to the  date  of
termination.

        Date of Board of Director Adoption:  December 16, 1987
                                           ----------------------
        Amended June 2, 1993 effective July 23, 1993                            


        A true copy.

                                                 ATTEST:

                                                  /s/ Illegible
                                                 -------------------------------
                                                 Clerk or Secretary

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