UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549

                                    FORM 8-K

                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): April 4, 2005

                         Callisto Pharmaceuticals, Inc.
             (Exact name of registrant as specified in its charter)


Delaware                                 001-32325           13-3894575
(State or other jurisdiction             (Commission         IRS Employer
of incorporation or organization)        File Number)        Identification No.)

                        420 Lexington Avenue, Suite 1609
                            New York, New York 10170
                    (Address of principal executive offices)

Registrant's telephone number, including area code: (212) 297-0010

          (Former name or former address, if changed since last report)


     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ] Written communication pursuant to Rule 425 under the Securities Act 
     (17 CFR 230.425)

     [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

     [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

     [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))







ITEM 5.02   DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF DIRECTORS;
            APPOINTMENT OF PRINCIPAL OFFICERS.


     On April 4, 2005, Iain Ross, a director of Callisto Pharmaceuticals, Inc.,
a Delaware corporation ("Callisto"), resigned from the Board of Directors of
Callisto for personal reasons.

                                    SIGNATURE


     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

Dated:   April 8, 2005


                                            CALLISTO PHARMACEUTICALS, INC.



                                            By:  /S/ GARY S. JACOB     
                                                 ----------------------
                                                 Gary S. Jacob, Ph.D.
                                                 Chief Executive Officer
  









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