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                                  UNITED STAES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                 SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                          (Amendment No.____________)*


                           SIGA PHARMACEUTICALS, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                  826 917 10 6
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                             Sheryl Albanese, Esq.
                    Ehrenreich Eilenberg Krause & Zivian LLP
                        11 East 44th Street, 17th Floor
                            New York, New York 10017
                                 (212) 986-9700
- --------------------------------------------------------------------------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)


                                September 9, 1997
- --------------------------------------------------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement of Schedule 13G to report
the  acquisition  which is the subject of the  Schedule  13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Check  the following  box  if  a  fee  is  being  paid  with this statement [X].
(A fee  is not  required  only  if the  reporting  person:  (1)  has a  previous
statement on file  reporting  beneficial  ownership of more than five percent of
the class of  securities  described  in Item 1; and (2) has  filed no  amendment
subsequent  thereto  reporting  beneficial  ownership of five percent or less of
such class.) (See Rule 13d-7.)

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder  of this cover page shall be filed out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                        (Continued on following page(s))





CUSIP No.   826 917 10 6            13D                   



- --------------------------------------------------------------------------------
   1   NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


                                 Richard Stone

- --------------------------------------------------------------------------------
   2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [X]


- --------------------------------------------------------------------------------
   3   SEC USE ONLY




- --------------------------------------------------------------------------------
   4   SOURCE OF FUNDS*



                                       PF
- --------------------------------------------------------------------------------
   5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
       ITEMS 2(d) OR 2(e)                                         [  ]


- --------------------------------------------------------------------------------
   6   CITIZENSHIP OR PLACE OF ORGANIZATION



                                      USA
- --------------------------------------------------------------------------------
   NUMBER OF      7    SOLE VOTING POWER
     SHARES            470,665
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      8    SHARED VOTING POWER
      EACH             0
   REPORTING      --------------------------------------------------------------
     PERSON       9    SOLE DISPOSITIVE POWER
      WITH             470,665
                  --------------------------------------------------------------
                  10   SHARED DISPOSITIVE POWER
                       0

- --------------------------------------------------------------------------------
  11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        470,665

- --------------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

                                                                      [  ]

- --------------------------------------------------------------------------------
  13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

       7.2%

- --------------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*

       IN


- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!




Signature


     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  as of 9/9/97                          /s/Richard Stone
                                             -----------------------------------
                                                Richard Stone
Executed  6/3/98
                                             



(120496DTI)