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

                                 SCHEDULE 13G/A
                                 (Rule 13d-102)
                                ----------------

              INFORMATION TO BE INCLUDED IN STATEMENTS PURSUANT TO
                   RULES 13d-1(b), (c) AND (d) AND AMENDMENTS
                    THERETO FILED PURSUANT TO 13d-2 UNDER THE
                         SECURITIES EXCHANGE ACT OF 1934
                               (Amendment No. 1)*

                           DUSA Pharmaceuticals, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    266898105
                                 (CUSIP Number)

                                December 31, 2007
             (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)

                                    (Page 1 of 2 Pages)
-----------

     * 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).




Schedule 13G/A                                               PAGE 2 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Phaeton International (BVI) Ltd.
            None
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
            British Virgin Islands
------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    394,100
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    394,100
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            394,100
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            1.64%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            CO
------------------------------------------------------------------------





Schedule 13G/A                                               PAGE 3 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Phoenix Partners, L.P.
            13-6272912
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

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

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    448,900
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    448,900
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            448,900
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            1.86%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            PN
------------------------------------------------------------------------





Schedule 13G/A                                               PAGE 4 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Phoenix Partners II, L.P.
            84-1631449
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

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

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    99,700
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    99,700
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            99,700
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            0.41%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            PN
------------------------------------------------------------------------





Schedule 13G/A                                               PAGE 5 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Morgens, Waterfall, Vintiadis & Co., Inc.
          13-2674766
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

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

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    942,700
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    942,700
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            942,700
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            3.92%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            IA
------------------------------------------------------------------------





Schedule 13G/A                                               PAGE 6 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Edwin H. Morgens
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

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

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    942,700
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    942,700
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            942,700
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            3.92%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            IN
------------------------------------------------------------------------





Schedule 13G/A                                               PAGE 7 of 12
CUSIP No.  266898105


     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            John C. Waterfall
------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a)  [ ]
                                                               (b)  [X]
------------------------------------------------------------------------
     (3)  SEC USE ONLY

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

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    942,700
OWNED BY       _________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    942,700
------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
            942,700
------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES                        [ ]
------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
            3.92%
------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON
            IN
------------------------------------------------------------------------




Schedule 13G/A                                               PAGE 8 of 12
CUSIP No.  266898105


ITEM 1(a).  NAME OF ISSUER:
              DUSA Pharmaceuticals, Inc. (the "Company")

ITEM 1(b).  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
              25 Upton Drive, Wilmington, MA 01887

ITEM 2(a).  NAME OF PERSON FILING:
               This Schedule 13G is filed jointly by (a) Phaeton International
               (BVI) Ltd. ("Phaeton"), (b) Phoenix Partners, L.P. ("Phoenix"),
               (c) Phoenix Partners II, L.P.("Phoenix II"), (d) Morgens,
               Waterfall, Vintiadis & Company, Inc. ("Morgens Waterfall" (e)
               Edwin H. Morgens ("Morgens") and (f) John C. Waterfall
               ("Waterfall" and together with the persons listed in (a) through
               (f), the "Reporting Persons").

               Phaeton, Phoenix and Phoenix II are hereinafter sometimes
               collectively referred to as the "Advisory Clients".

ITEM 2(b).  ADDRESS OF PRINCIPAL OFFICE OR, IF NONE, RESIDENCE:
              The business address of each of the Reporting Persons is 600 Fifth
              Avenue, 27th Floor, New York NY 10020.

ITEM 2(c).  CITIZENSHIP:
              Phoenix is a limited partnership organized under the laws of the
              State of New York. Phoenix II is a limited partnership organized
              under the laws of the State of Delaware. Phaeton is an exempted
              company organized in British Virgin Islands. Morgens Waterfall is
              a corporation organized under the laws of the State of New York.
              Each of Morgens and Waterfall are United States citizens.

ITEM 2(d).  TITLE OF CLASS OF SECURITIES:
              Common Stock

ITEM 2(e).  CUSIP NUMBER:
              266898105.

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO 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 of 1940

           (e)  [ ] Investment Adviser registered under Section 203 of the
                    Investment Advisers Act of 1940: see Rule 13d-
                    1(b)(1)(ii)(E)

           (f)  [ ] Employee Benefit Plan, Pension Fund which is subject




Schedule 13G/A                                               PAGE 9 of 12
CUSIP No.  266898105


                    to the provisions of the Employee Retirement Income Security
                    Act of 1974 or Endowment Fund; see Rule 13d-1(b)(1)(ii)(F)

           (g)  [ ] Parent Holding Company, in accordance with Rule 13d-
                    1(b)(ii)(G);

           (h)  [ ] Savings Associations as defined in Section 3(b) of the
                    Federal Deposit Insurance Act;

           (i)  [ ] 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 Rule 13d-1(c),
         CHECK THIS BOX.                                           [x]

ITEM 4.  OWNERSHIP.

     The percentages used herein are calculated based on the 24,076,110 shares
issued and outstanding as of November 8, 2007, as reported in the Company's
quarterly report on Form 10-Q filed with the Securities and Exchange Commission
by the Company for the quarterly period ended September 30, 2007.

      A. Phaeton International (BVI) Ltd
              (a) Amount beneficially owned: 394,100
              (b) Percent of class: 1.64%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: 394,100
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: 394,100

      B. Phoenix Partners, L.P.
              (a) Amount beneficially owned: 448,900
              (b) Percent of class: 1.86%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: 448,900
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: 448,900

      C. Phoenix Partners II, L.P.
              (a) Amount beneficially owned: 99,700
              (b) Percent of class: 0.41%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: 99,700
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: 99,700

      D. Morgens, Waterfall, Vintiadis & Co., Inc.
              (a) Amount beneficially owned: 942,700
              (b) Percent of class: 3.92%
              (c)(i) Sole power to vote or direct the vote: -0-





Schedule 13G/A                                               PAGE 10 of 12
CUSIP No.  266898105


                (ii) Shared power to vote or direct the vote: 942,700
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: 942,700

      E. Edwin H. Morgens
              (a) Amount beneficially owned: 942,700
              (b) Percent of class: 3.92%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 942,700
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 942,700

      F. John C. Waterfall
              (a) Amount beneficially owned: 942,700
              (b) Percent of class: 3.92%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 942,700
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 942,700

Morgens Waterfall is an investment adviser registered under Section 203 of the
Investment Advisers Act of 1940, as amended. The business of Morgens Waterfall
is the rendering of financial services and as such it provides discretionary
investment advisory services to each of the Advisory Clients. In such capacity,
Morgens Waterfall has the power to make decisions regarding the dispositions of
the proceeds from the sale of the foregoing shares of Common Stock. Under the
rules promulgated by the Securities and Exchange Commission, Morgens Waterfall
and its principals (Mr. Morgens and Mr. Waterfall) may be considered "beneficial
owners" of securities acquired by the Advisory Clients. Each such Advisory
Client has the right to receive or the power to direct the receipt of dividends
from, or the proceeds from the sale of, the securities held in such person's
account.

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 Persons have ceased to be the beneficial
            owner of more than five percent of the class of securities, check
            the following [X].

ITEM 6.   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
            Not applicable.

ITEM 7.   IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
          THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
            Not applicable.

ITEM 8.   IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
            Not applicable.

ITEM 9.   NOTICE OF DISSOLUTION OF GROUP.
            Not applicable.




Schedule 13G/A                                               PAGE 11 of 12
CUSIP No.  266898105



ITEM 10.  CERTIFICATION.  (if filing pursuant to Rule 13d-1(c))
            By signing below each Reporting Person certifies that, to the best
            of its 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.





Schedule 13G/A                                               PAGE 12 of 12
CUSIP No.  266898105


                                    SIGNATURE

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

DATED:  February 1, 2008


                                    /s/ Edwin H. Morgens
                                    --------------------
                                    Edwin H. Morgens,
                                    as attorney-in-fact for
                                    the Reporting Persons