UNITED STATES
                         SECURITIES EXCHANGE COMMISSION
                             Washington, D.C. 20549
--------------------------------------------------------------------------------

                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*

                         QUANTA CAPITAL HOLDINGS LIMITED
                         -------------------------------
                                (Name of Issuer)

                    Common Stock, $0.01 par value per share
               -------------------------------------------------
                         (Title of Class of Securities)

                                   G7313F106
                               -------------------
                                 (CUSIP Number)

                                 Brad Huntington
                       Brevan Howard P&C Partners Limited
                               12 Bermudiana Road
                                    3rd Floor
                                 Hamilton, HMAX
                                     Bermuda
                                  +14412929774
                              --------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                October 10, 2008
                             ----------------------
             (Date of Event which Requires Filing of this Statement)


If the filing Persons has previously filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
statement because of ss.ss.240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all exhibits.  See  ss.240.13d-7  for other
parties to whom copies are to be sent.

* 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 13D


CUSIP NO.:  G7313F106                                          PAGE 2 OF 9 PAGES

...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).

      BREVAN HOWARD P&C PARTNERS LIMITED
...............................................................................
2.    Check the Appropriate Box if a Member of a Group (See Instructions)

      (a) [ ]

      (b) [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Source of Funds (See Instructions)

      WC
...............................................................................
5.    Check if Disclosure of Legal Proceedings is Required Pursuant to Items
      2(d) or 2(e)

      [  ]
...............................................................................
6.    Citizenship or Place of Organization

      CAYMAN ISLANDS
...............................................................................
Number of           7.   Sole Voting Power                  0
Shares            ............................................................
Beneficially        8.   Shared Voting Power                0
Owned by Each     ............................................................
Reporting           9.   Sole Dispositive Power             0
Person With       ............................................................
                    10.  Shared Dispositive Power           0
...............................................................................
11.   Aggregate Amount Beneficially Owned by Each Reporting Person

      0
...............................................................................
12.   Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See
      Instructions)

      [ ]
...............................................................................
13.   Percent of Class Represented by Amount in Row (11)

      0% based on 0 shares outstanding as of October 10, 2008.
...............................................................................
14.   Type of Reporting Person:

      PN




                                  SCHEDULE 13D

CUSIP NO.:  G7313F106                                          PAGE 3 OF 9 PAGES

...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).

      ARMOUR REINSURANCE GROUP LIMITED
...............................................................................
2.    Check the Appropriate Box if a Member of a Group (See Instructions)

      (a) [ ]

      (b) [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Source of Funds (See Instructions)

      WC
...............................................................................
5.    Check if Disclosure of Legal Proceedings is Required Pursuant to Items
      2(d) or 2(e)

      [  ]
...............................................................................
6.    Citizenship or Place of Organization

      CAYMAN ISLANDS
...............................................................................
Number of           7.   Sole Voting Power                  0
Shares            ............................................................
Beneficially        8.   Shared Voting Power                0
Owned by Each     ............................................................
Reporting           9.   Sole Dispositive Power             0
Person With       ............................................................
                    10.  Shared Dispositive Power           0
...............................................................................
11.   Aggregate Amount Beneficially Owned by Each Reporting Person

      0
...............................................................................
12.   Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See
      Instructions)

      [ ]
...............................................................................
13.   Percent of Class Represented by Amount in Row (11)

      0% based on 0 shares outstanding as of October 10, 2008.
...............................................................................
14.   Type of Reporting Person:

      OO



                                  SCHEDULE 13D

CUSIP NO.:  G7313F106                                          PAGE 4 OF 9 PAGES

...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).

      BREVAN HOWARD P&C MASTER FUND LIMITED
...............................................................................
2.    Check the Appropriate Box if a Member of a Group (See Instructions)

      (a) [ ]

      (b) [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Source of Funds (See Instructions)

      WC
...............................................................................
5.    Check if Disclosure of Legal Proceedings is Required Pursuant to Items
      2(d) or 2(e)

      [  ]
...............................................................................
6.    Citizenship or Place of Organization

      CAYMAN ISLANDS
...............................................................................
Number of           7.   Sole Voting Power                  0
Shares            ............................................................
Beneficially        8.   Shared Voting Power                0
Owned by Each     ............................................................
Reporting           9.   Sole Dispositive Power             0
Person With       ............................................................
                    10.  Shared Dispositive Power           0
...............................................................................
11.   Aggregate Amount Beneficially Owned by Each Reporting Person

      0
...............................................................................
12.   Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See
      Instructions)

      [ ]
...............................................................................
13.   Percent of Class Represented by Amount in Row (11)

      0% based on 0 shares outstanding as of October 10, 2008.
...............................................................................
14.   Type of Reporting Person:

      OO




                                  SCHEDULE 13D

CUSIP NO.:  G7313F106                                          PAGE 5 OF 9 PAGES

...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).

      BRAD HUNTINGTON
...............................................................................
2.    Check the Appropriate Box if a Member of a Group (See Instructions)

      (a) [ ]

      (b) [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Source of Funds (See Instructions)

      WC
...............................................................................
5.    Check if Disclosure of Legal Proceedings is Required Pursuant to Items
      2(d) or 2(e)

      [  ]
...............................................................................
6.    Citizenship or Place of Organization

      CANADA
...............................................................................
Number of           7.   Sole Voting Power                  0
Shares            ............................................................
Beneficially        8.   Shared Voting Power                0
Owned by Each     ............................................................
Reporting           9.   Sole Dispositive Power             0
Person With       ............................................................
                    10.  Shared Dispositive Power           0
...............................................................................
11.   Aggregate Amount Beneficially Owned by Each Reporting Person

      0
...............................................................................
12.   Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See
      Instructions)

      [ ]
...............................................................................
13.   Percent of Class Represented by Amount in Row (11)

      0% based on 0 shares outstanding as of October 10, 2008.
...............................................................................
14.   Type of Reporting Person:

      IN




                                                               Page 6 of 9 Pages

                  Pursuant  to  Rule  13d-2  promulgated  under  the  Act,  this
Schedule  13D/A  (this  "Amendment  No.  2") amends  the  Schedule  13D filed on
November 2, 2007 (the "Original  Schedule 13D" and as amended by Amendment No. 1
thereto  filed with the  Commission  on December  17, 2007,  together  with this
Amendment No. 2, are  collectively  referred to herein as the  "Schedule  13D").
This Amendment No. 2 relates to the common stock,  par value $0.01 per share, of
Quanta Capital Holdings Limited,  a Bermuda  corporation (the "Issuer").  Unless
the context otherwise  requires,  references herein to the "Common Stock" are to
such common  stock of the Issuer.  This  Amendment  No. 3 to the Schedule 13D is
being  filed by the  Reporting  Persons to report that the number of Shares that
the Reporting  Persons may be deemed to  beneficially  own has decreased by more
than one percent of the current amount of outstanding Shares.  Capitalized terms
used but not  defined  herein  shall have the  meanings  ascribed to them in the
Initial Statement. The Schedule 13D is amended as follows.

Item 1.           Security and Issuer

                  This  Statement  relates  to the  Shares.  The  address of the
principal executive office of the Issuer is Cumberland House, 1 Victoria Street,
Hamilton, Bermuda, HM 11.

Item 2.           Identity and Background

                  This  Statement  is filed on behalf  of each of the  following
persons (collectively, the "Reporting Persons"):

                  i)   Brevan Howard P&C Partners Limited  ("BH P&C Partners");

                  ii)  Armour Reinsurance Group Limited ("Armour");

                  iii) Brevan  Howard  P&C  Master  Fund  Limited  ("P&C  Master
                       Fund");

                  iv)  Brad Huntington ("Mr. Huntington").

                  This Statement  relates to Shares (as defined herein) held for
the account of Armour, a Cayman Islands exempted company.

                              The Reporting Persons

                  BH P&C Partners is a Bermudan  limited  liability  company and
its principal  office is located at 12  Bermudiana  Road,  3rd Floor,  Hamilton,
HMAX,  Bermuda.  The principal  business of BH P&C Partners is management of the
investment activities of each of Armour, P&C Master Fund, Brevan Howard P&C Fund
Limited and Brevan  Howard P&C Fund,  L.P. BH P&C Partners  serves as investment
manager to Armour,  and in such capacity,  BH P&C Partners may be deemed to have
voting and  dispositive  power  over,  the Shares  held for such  accounts.  Mr.
Huntington is the Chief Executive Officer of BH P&C Partners.

Item 5.           Interest in Securities of the Issuer

                  Item 5 of Schedule  13D is hereby  amended and restated in its
entirety as follows:

                  According  to  information  reflected  on a Form 25  with  the
Securities and Exchange Commission, the number of Shares outstanding was 0 as of
October 10, 2008, as the Issuer deregistered its securities on such Form 25.



                                                               Page 7 of 9 Pages

                  (a) Each of BH P&C Partners,  Armour,  P&C Master Fund and Mr.
Huntington may be deemed the beneficial owner of 0 Shares  (approximately  0% of
the total number of Shares outstanding).

                  (b) (i) BH P&C  Partners may be deemed to have shared power to
direct  the voting and  disposition  of the 0 Shares  that they may be deemed to
beneficially own as set forth above.

                      (ii) Mr. Huntington,  Armour  and  P&C  Master Fund may be

deemed to have shared power to direct the voting and disposition of the 0 Shares
that BH P&C Partners may be deemed to beneficially own as set forth above.

                  (c) Information concerning transactions in the Shares effected
by the Reporting  Persons  since the filing of the Original  Schedule 13D is set
forth  in  Schedule  A  and  is  incorporated  by  reference.   Except  for  the
transactions  by the Brevan  Howard  Reporting  Persons  set forth on Schedule A
hereto, since the filing of the Original Schedule 13D there were no transactions
in the Shares  effected by BH P&C  Partners,  Armour,  P&C Master Fund,  and Mr.
Huntington, nor, to the best of the knowledge of the by BH P&C Partners, Armour,
P&C Master Fund, and Mr.  Huntington,  any of the BH P&C Partners,  Armour,  P&C
Master Funds' executive  officers or members.  All of the transactions in Shares
listed on Schedule A hereto were effected due to  acquisition  of Quanta Capital
Holdings Ltd. by Catalina Holdings  (Bermuda) Ltd.,  effective October 10, 2008.
Upon  completion  of this  transaction,  the  common  shares of  Quanta  Capital
Holdings Ltd. have been  cancelled and converted into the right to receive $2.80
in cash.  Please see the most recently filed Form 8-K of Quanta Capital Holdings
Ltd., available at http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK
=0001264242&owner=include&count=40

                  (d) Not applicable.

                  (e) The Reporting Persons ceased to be the beneficial owner of
more than 5% of the Shares on October 10, 2008.

                                   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: October 29, 2008                  BREVAN HOWARD P&C PARTNERS LIMITED


                                        By:
                                           /s/ Brad Huntington
                                           -------------------------------
                                        Name:  Brad Huntington
                                        Title: Director


Date: October 29, 2008                  ARMOUR REINSURANCE GROUP LIMITED


                                        By:
                                           /s/ Brad Huntington
                                           -------------------------------
                                        Name:  Brad Huntington
                                        Title: Director



                                                               Page 8 of 9 Pages

Date: October 29, 2008                  BREVAN HOWARD P&C MASTER FUND LIMITED


                                        By:
                                           /s/ Brad Huntington
                                           -------------------------------
                                        Name:  Brad Huntington
                                        Title: Director


Date: October 29, 2008                  BRAD HUNTINGTON


                                        By:
                                          /s/ Brad Huntington
                                          --------------------------------
                                        Name: Brad Huntington



                                                               Page 9 of 9 Pages

                                   SCHEDULE A

                    RECENT TRANSACTIONS IN THE SECURITIES OF
                         QUANTA CAPITAL HOLDINGS LIMITED

                  On October 10, 2008, the Reporting  Persons received $2.80 per
share for 6,785,045 shares. This was due to the to acquisition of Quanta Capital
Holdings  Ltd.  by Catalina  Holdings  (Bermuda)  Ltd.,  As per the terms of the
transaction,  common shares of Quanta Capital  Holdings Ltd. have been cancelled
and converted into the right to receive $2.80 in U.S. dollars without interest.