SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C. 20549
                        ________________

                          SCHEDULE 13G/A
                        ________________

     INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
            UNDER THE SECURITIES EXCHANGE ACT OF 1934

                       (AMENDMENT NO. 1)*

                      Myriad Genetics, Inc.
                        (NAME OF ISSUER)

                       Common Stock, $0.01 par value
                       (TITLE OF CLASS OF SECURITIES)

                           62855J 10 4
                         (CUSIP NUMBER)





__________________

*    The remainder of this cover page shall be filled 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 in 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).


                           PAGE 1 OF 7 PAGES 







          By reason of the provisions of Rule 13d-3 under the Act, Ardsley and
Mr. Hempleman may each be deemed to own beneficially the shares of Common Stock
owned by the managed accounts.  Each client for whose account Ardsley had
purchased Common Stock has the right to receive or the power to direct the 
receipt of dividends from, or the proceeds from the sale of, such Common Stock 
purchased for his account. No such client has any of the foregoing rights with 
respect to more than five percent of the class of securities identified in Item 
2(d).  There is no agreement or understanding among such persons to act 
together for the purpose of acquiring, holding, voting or disposing of any such 
securities.  To the knowledge of Ardsley, no other person has the right to
receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, a number of such Common Stock which represents more than five
percent of the number of outstanding shares of Common Stock.











                             PAGE 6 OF 7 PAGES





ITEM 10.  CERTIFICATION.  (if filing pursuant to Rule 13d-1(b))

          By signing below Ardsley Advisory Partners and Philip J. Hempleman
certify that, to the best of their knowledge and belief, the securities
referred to above were acquired in the ordinary course of business, were not
acquired for the purpose of and do not have the effect of changing or
influencing the control of the issuer of such securities and were not acquired
in connection with or as a participant in any transaction having such purposes
or effect.



                            SIGNATURE

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




                              February ____, 1998



                              /s/Philip J. Hempleman
                              ----------------------
                              Philip J. Hempleman, as
                              Managing Partner of 
                              Ardsley Advisory Partners


                              /s/Philip J. Hempleman
                              ----------------------
                              Philip J. Hempleman

                            PAGE 7 OF 7 PAGES