SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
          TO RULES 13d-1 (b) (c), AND (d) AND AMENDMENTS THERETO FILED
                           PURSUANT TO RULE 13d-2 (b)
                                (Amendment No. )

                                Bioenvision, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                          Common Stock, par value $.001
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    09059N100
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                                 (CUSIP Number)

                                  July 2, 2007
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             (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|   Rule 13d-1(b)

      |X|   Rule 13d-1(c)

      |_|   Rule 13d-1(d)

*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
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).



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CUSIP No. 09059N100                    13G                     Page 2 of 7 Pages
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(1)   NAMES OR REPORTING PERSONS
      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

      Joseph Edelman
--------------------------------------------------------------------------------
(2)   CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS):
      (a) |_|
      (b) |X|
--------------------------------------------------------------------------------
(3)   SEC USE ONLY

--------------------------------------------------------------------------------
(4)   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
               (5)   SOLE VOTING POWER

                     4,170,000
               -----------------------------------------------------------------
  NUMBER OF    (6)   SHARED VOTING POWER
   SHARES
 BENEFICIALLY        0
  OWNED BY     -----------------------------------------------------------------
    EACH       (7)   SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            4,100,000
    WITH       -----------------------------------------------------------------
               (8)   SHARED DISPOSITIVE POWER

                     70,000
--------------------------------------------------------------------------------
(9)   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                     4,170,000
--------------------------------------------------------------------------------
(10)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
      (SEE INSTRUCTIONS) |_|


--------------------------------------------------------------------------------
(11)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                     7.58%

--------------------------------------------------------------------------------
(12)  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                     IN
================================================================================


                               Page 2 of 10 Pages


================================================================================
CUSIP No. 09059N100                    13G                     Page 3 of 7 Pages
--------------------------------------------------------------------------------

(1)   NAMES OR REPORTING PERSONS
      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

      Scott Bradley
--------------------------------------------------------------------------------
(2)   CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS):
      (a) |_|
      (b) |X|
--------------------------------------------------------------------------------
(3)   SEC USE ONLY

--------------------------------------------------------------------------------
(4)   CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
               (5)   SOLE VOTING POWER

                     0
               -----------------------------------------------------------------
  NUMBER OF    (6)   SHARED VOTING POWER
   SHARES
 BENEFICIALLY        0
  OWNED BY     -----------------------------------------------------------------
    EACH       (7)   SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            0
    WITH       -----------------------------------------------------------------
               (8)   SHARED DISPOSITIVE POWER

                     70,000
--------------------------------------------------------------------------------
(9)   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                     70,000
--------------------------------------------------------------------------------
(10)  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
      (SEE INSTRUCTIONS) |_|


--------------------------------------------------------------------------------
(11)  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                     0.13%

--------------------------------------------------------------------------------
(12)  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                     IN
================================================================================


                               Page 3 of 10 Pages


Item 1.

      (a)   Name of Issuer.

            Bioenvision, Inc.

      (b)   Address of Issuer's Principal Executive Offices.

            345 Park Avenue, 41st Floor
            New York, NY 10154

Item 2.

      (a)   Name of Person Filing.

            This Schedule 13G is being filed with respect to shares of Common
            Stock of the Issuer which are beneficially owned by Joseph Edelman.
            See Item 4 below.

      (b)   Address of Principal Business Office or, if none, Residence.

            The principal business address of the Reporting Persons is:

            c/o Perceptive Advisors
            499 Park Avenue, 25th Floor
            New York, NY 10022

      (c)   Citizenship.

            Each of the Reporting Persons is a United States citizen.

      (d)   Title of Class of Securities.

            Common Stock, $.001 par value

      (e)   CUSIP Number.

            09059N100


                               Page 4 of 10 Pages


Item 3. If this statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) or (c),
        check whether the person filing is a:

      (a)   |_| Broker or dealer registered under Section 15 of the Act.

      (b)   |_| Bank as defined in Section 3(a)(6) of the Act.

      (c)   |_| Insurance Company as defined in Section 3(a)(19) of the Act.

      (d)   |_| Investment Company registered under Section 8 of the Investment
                Company Act.

      (e)   |_| Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

      (f)   |_| Employee Benefit Plan or Endowment Fund in accordance with Rule
                13d-1(b)(1)(ii)(F).

      (g)   |_| Parent holding company, in accordance with Rule 13d-1(b)(ii)(G).

      (h)   |_| A savings association as defined in Section 3(b) of the Federal
                Deposit Insurance Act.

      (i)   |_| A church plan that is excluded from the definition of an
                investment company under Section 3(c)(14) of the Investment
                Company Act of 1940.

      (j)   |_| Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

      If this statement is filed pursuant to Sec. 240.13d-1(c), check this box
      |X|.

Item 4. Ownership

      (a)   Amount Beneficially Owned.

                        Mr. Edelman: 4,170,000 shares of common stock (comprised
                        of (i) 3,942,301 shares held by Perceptive Life Sciences
                        Master Fund Ltd. ("Master Fund"), a Cayman Islands
                        company of which the investment manager is Perceptive
                        Advisors LLC, a Delaware limited liability company of
                        which Mr. Edelman is the managing member, 70,000 shares
                        of which Mr. Edelman shares dispositive power with Mr.
                        Bradley and (ii) 227,699 shares held in an account of
                        First New York Trading, LLC).

                        Mr. Bradley: 70,000 (comprised of 70,000 shares held by
                        Master Fund of which Mr. Bradley shares dispositive
                        power with Mr. Edelman).

      (b)   Percent of Class.

                        7.58%


                               Page 5 of 10 Pages


      (c)   Number of shares as to which each such person has

            (i)   sole power to vote or to direct the vote:   Edelman: 4,170,000
                                                              Bradley: 0

            (ii)  shared power to vote or to direct the vote: Edelman: 0
                                                              Bradley: 0

            (iii) sole power to dispose or to direct the disposition of:
                                                              Edelman: 4,100,000
                                                              Bradley: 0
--------------------------------------------------------------------------------
            (iv)  shared power to dispose or to direct the disposition of:
                                                              Edelman: 70,000
                                                              Bradley: 70,000

Item 5.     Ownership of Five Percent or Less of a Class.

            If this statement is being filed to report the fact that as of the
            date hereof the reporting person has ceased to be the beneficial
            owner of more than five percent of the class of securities, check
            the following |_|

Item 6.     Ownership of More than Five Percent on Behalf of Another Person.

            As referred to in Item 4, other persons have the right to receive
            and the power to direct the receipt of dividends from, and the
            proceeds from the sale of, certain of the shares reported herein. In
            that regard Mr. Edelman is the managing member of Perceptive
            Advisors LLC, the investment manager of the Master Fund.
            Accordingly, the Master Fund has the right to receive and the power
            to direct the receipt of, dividends and the proceeds from the sale
            of the shares reported herein that are held through the Master Fund.

Item 7.     Identification and Classification of the Subsidiary Which
            Acquired the Security Being Reported on by the Parent Holding
            Company or Control Person.

            See Exhibit B.

Item 8.     Identification and Classification of Members of the Group.

            See Exhibit C.

Item 9.     Notice of Dissolution of Group.

            Not applicable.


                               Page 6 of 10 Pages


Item 10.    Certification.

      By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.

                                    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: July 10, 2007


                                                /s/ James Mannix
                                                --------------------------------
                                                Joseph Edelman, by James Mannix,
                                                attorney in fact


                                                /s/ Scott Bradley
                                                --------------------------------
                                                Scott Bradley

      Attention: Intentional misstatements or omissions of fact constitute
Federal criminal violations (see 18 U.S.C. 1001).


                               Page 7 of 10 Pages


                                    EXHIBIT A

The undersigned hereby agree jointly to prepare and file with regulatory
authorities a Schedule 13G and any amendments thereto reporting each of the
undersigned's ownership of securities of Bioenvision, Inc. and hereby affirm
that such Schedule 13G is being filed on behalf of each of the undersigned.

Date: July 10, 2007


                                                /s/ James Mannix
                                                --------------------------------
                                                Joseph Edelman, by James Mannix,
                                                attorney in fact


                                                /s/ Scott Bradley
                                                --------------------------------
                                                Scott Bradley


                               Page 8 of 10 Pages


                                    EXHIBIT B

As discussed in Item 4(a), certain shares reported herein are held through
Perceptive Life Sciences Master Fund Ltd., a Cayman Islands company, of which
Joseph Edelman is the managing member of the fund's investment manager.


                               Page 9 of 10 Pages


                                    EXHIBIT C

Joseph Edelman and Scott Bradley may be deemed to constitute a group for
purposes of Section 13(d)(3) of the Securities Exchange Act of 1934. Messrs.
Edelman and Bradley disclaim the existence of such a group.


                              Page 10 of 10 Pages