SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                ----------------

                                  SCHEDULE 13D
                                 (Rule 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                                (Amendment No. 3)

                              Century Bancorp, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                      Class A Common Stock, $1.00 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    156432106
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                    Sy Jacobs
                            c/o JAM Managers, L.L.C.
                                 One 5th Avenue
                            New York, New York 10003

                                       and

                                  Paul Magidson
                     c/o Castine Capital Management, L.L.C.
                       One International Place, Suite 2401
                           Boston, Massachusetts 02110
                                 (617) 310-5190
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                February 15, 2006
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of This Statement)

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


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     JAM Partners, L.P. - 13-3810784

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                          [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     210,000

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     210,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     210,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     6.1%

14.  TYPE OF REPORTING PERSON

     PN


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     JAM Managers, L.L.C. - 13-4063169

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                          [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     210,000

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     210,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     210,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     6.1%

14.  TYPE OF REPORTING PERSON

     OO


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Sy Jacobs

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC, PF

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                          [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     20,000

8.   SHARED VOTING POWER

     230,000

9.   SOLE DISPOSITIVE POWER

     20,000

10.  SHARED DISPOSITIVE POWER

     230,000

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     230,000

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     6.7%

14.  TYPE OF REPORTING PERSON

     IN


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Castine Partners, LP - 38-3674333

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                          [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     53,786

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     53,786

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     53,786

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     1.5%

14.  TYPE OF REPORTING PERSON

     PN


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Castine Partners II, LP - 20-0758073

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e) [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     Delaware

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     38,688

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     38,688

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     38,688

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     1.1%

14.  TYPE OF REPORTING PERSON

     PN


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Castine Offshore Fund, Ltd.

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX 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 SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     17,702

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     17,702

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     17,702

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     0.5%

14.  TYPE OF REPORTING PERSON

     CO


CUSIP No. 156432106
          ---------

1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

     Paul Magidson

2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [X]
                                                                         (b) [_]

3.   SEC USE ONLY

4.   SOURCE OF FUNDS

     WC

5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) OR 2(e)                                          [_]

6.   CITIZENSHIP OR PLACE OF ORGANIZATION

     United States of America

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON

7.   SOLE VOTING POWER

     0

8.   SHARED VOTING POWER

     110,176

9.   SOLE DISPOSITIVE POWER

     0

10.  SHARED DISPOSITIVE POWER

     110,176

11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     110,176

12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES

13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     3.2%

14.  TYPE OF REPORTING PERSON

     IN


CUSIP No. 156432106
          ---------

--------------------------------------------------------------------------------
Item 1. Security and Issuer.

The class of equity securities to which this Statement on Schedule 13D (this
"Schedule 13D") relates is the Class A Common Stock, $1.00 par value per share
(the "Class A Common Stock"), of Century Bancorp, Inc. ("Century Bancorp").
Century Bancorp is a Massachusetts corporation with its principal executive
offices located at 400 Mystic Avenue, Medford, MA 02155.

--------------------------------------------------------------------------------
Item 2. Identity and Background.

     (a) This Schedule 13D is being filed by JAM Partners, L.P., a Delaware
limited partnership ("JAM Partners"), (ii) JAM Managers L.L.C., a Delaware
limited liability company ("JAM Managers"), (iii) Sy Jacobs, a citizen of the
United States of America ("Jacobs"), (iv) Castine Partners, LP, a Delaware
limited partnership ("Castine Partners"), (v) Castine Partners II, LP, a
Delaware limited partnership ("Castine Partners II"), (vi) Castine Offshore
Fund, Ltd., a Cayman Islands corporation ("Castine Offshore"), and (vii) Paul
Magidson, a citizen of the United States of America ("Magidson"). These filers
are referred to individually as a "Reporting Person" and collectively as
"Reporting Persons".

     (b) The business office of JAM Partners, JAM Managers L.L.C., and Jacobs is
One Fifth Avenue, New York, New York 10003. The business office of Castine
Partners, Castine Partners II, Castine Offshore and Magidson is c/o Castine
Capital Management, LLC, One International Place, Suite 2401, Boston,
Massachusetts 02110.

     (c) JAM Partners is an investment fund, JAM Managers is the general partner
of JAM Partners, and Jacobs' is a managing member of JAM Managers. Castine
Partners, Castine Partners II, and Castine Offshore are investment funds, and
Magidson is a managing member of the general partner or investment manager of
these investment funds.

     (d) None of the Reporting Persons has been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors) during the
last five years.

     (e) None of the Reporting Persons has been a party to a civil proceeding of
a judicial or administrative body of competent jurisdiction during the last five
years, and no Reporting Person is subject to a judgment, decree or final order
enjoining future violations of, or prohibiting or mandating activities subject
to, Federal or State securities laws or finding any violation with respect to
such laws.

--------------------------------------------------------------------------------
Item 3. Source and Amount of Funds or Other Consideration.

With respect to all Reporting Persons other than Jacobs, the source of funds
used in making the purchases was working capital. With respect to Jacobs, the
source of funds used in making the purchases was working capital and personal
funds.

--------------------------------------------------------------------------------
Item 4. Purpose of Transaction.

With respect to all Reporting Persons, the purpose of the transaction was to
invest in Century Bancorp's Class A Common Stock. None of the Reporting Persons
has any plans or proposals that relate to or would result in any of the
following:

     (a) The acquisition by any person of additional securities of the issuer,
or the disposition of securities of the issuer;

     (b) An extraordinary corporate transaction, such as a merger,
reorganization or liquidation, involving the issuer or any of its subsidiaries;

     (c) A sale or transfer of a material amount of assets of the issuer or any
of its subsidiaries;

     (d) Any change in the present board of directors or management of the
issuer, including any plans or proposals to change the number or term of
directors or to fill any existing vacancies on the board;

     (e) Any material change in the present capitalization or dividend policy of
the issuer;

     (f) Any other material change in the issuer's business or corporate
structure;

     (g) Changes in the issuer's charter, bylaws or instruments corresponding
thereto or other actions which may impede the acquisition of control of the
issuer by any person;

     (h) Causing a class of securities of the issuer to be delisted from a
national securities exchange or to cease to be authorized to be quoted in an
inter-dealer quotation system of a registered national securities association;

     (i) A class of equity securities of the issuer becoming eligible for
termination of registration pursuant to Section 12(g)(4) of the Act; or

     (j) Any action similar to any of those enumerated above.

However, the Reporting Persons have certain concerns regarding the management,
operations, and corporate governance of Century Bancorp, and on February 15,
2006 JAM Partners sent a letter to the Board of Directors of Century Bancorp
expressing these concerns. A copy of this letter is attached to this Schedule
13D as Exhibit 1.

--------------------------------------------------------------------------------
Item 5. Interest in Securities of the Issuer.

     (a) As of October 31, 2005, 3,435,802 shares of Century Bancorp's Class A
Common Stock were outstanding (as disclosed in Century Bancorp's Quarterly
Report on Form 10-Q for the fiscal quarter ended September 30, 2005). The
aggregate number and percentage of Class A Common Stock held by each Reporting
Person is disclosed in Items 11 and 13 of such Reporting Person's cover page to
this Schedule 13D.

     (b) The number of shares of Class A Common Stock as to which each Reporting
Person has (i) sole or shared power to vote or to direct the vote and (ii) sole
or shared power to dispose or to direct the disposition is disclosed in Items 7,
8, 9, and 10 of such Reporting Person's cover page to this Schedule 13D.

     (c) There have been no transactions in the shares of Class A Common Stock
effected during the past 60 days by any of the Reporting Persons.

--------------------------------------------------------------------------------
Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
        to Securities of the Issuer.

The Reporting Persons have agreed to share the legal expenses associated with
preparing this Schedule 13D and to jointly file this Schedule 13D.

--------------------------------------------------------------------------------
Item 7. Material to be Filed as Exhibits.

Exhibit No.                   Description
-----------                   -----------

1                             Letter from JAM Partners, L.P. to the Board of
                              Directors of Century Bancorp, Inc. dated February
                              15, 2006.

2                             Joint Filing Agreement among the Reporting Persons
                              dated as of February 15, 2006.

--------------------------------------------------------------------------------


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.

                                    SIGNATURE


                                        SY JACOBS

                                        /s/ Sy Jacobs
                                        -------------------------------
                                            Sy Jacobs


                                        JAM PARTNERS, L.P.

                                        By: JAM Managers L.L.C.
                                            General Manager

                                        By: /s/ Sy Jacobs
                                        -------------------------------
                                        Name:  Sy Jacobs
                                        Title: Managing Member


                                        JAM MANAGERS L.L.C.

                                        By: /s/ Sy Jacobs
                                            ---------------------------
                                            Name:  Sy Jacobs
                                            Title: Managing Member


                                        CASTINE PARTNERS, LP

                                        By: /s/ Paul Magidson
                                            ---------------------------
                                            Name:  Paul Magidson
                                            Title: General Partner


                                        CASTINE PARTNERS II, LP

                                        By: /s/ Paul Magidson
                                            ---------------------------
                                            Name:  Paul Magidson
                                            Title: General Partner


                                        CASTINE OFFSHORE FUND, LTD.

                                        By: /s/ Paul Magidson
                                            ---------------------------
                                            Name:  Paul Magidson
                                            Title: General Partner


                                        PAUL MAGIDSON

                                        By: /s/ Paul Magidson
                                            ---------------------------
                                            Name: Paul Magidson


                                                                       Exhibit 1
                                                                       ---------

Via mail, email (msloane@century-bank.com), and facsimile (781-393-4070)
------------------------------------------------------------------------

February 15, 2006

The Board of Directors
c/o Marshall M. Sloane
Chairman of the Board
Century Bancorp, Inc.
400 Mystic Avenue
Medford, MA  02155

Dear Members of the Board of Directors;

I am writing to express our group's disappointment over the continued poor
performance of the bank, to relate to you a summary of our conversations with
two additional potential merger partners that would welcome the opportunity to
pursue such discussions with the independent board, and to share some
observations about management's posture toward investors. In addition, we again
request the opportunity to meet with the independent board to discuss these
issues and the management succession plan at Century in greater detail. The lack
of a real response from the board to our previous letters is disturbing.

Since our most recent letter, Century Bancorp has reported two awful quarters.
The first time we wrote to you we expressed our dismay over 2005's first quarter
earnings. This has been followed by three successively worse quarters. It is
hard for us to imagine that the independent board is not appalled and even
outraged at the dichotomy between what Marshall Sloane told shareholders to look
forward to in his annual letter at the beginning of the year and what has
actually transpired. In fact, we suspect that he painted an even rosier picture
for the board since any public opinion that he expressed was likely a
conservative scenario. 2005 was a year in which Century Bank would "excel" and
"thrive," in the words of management. We cannot reconcile those terms with the
financial performance for 2005 and imagine that the board cannot do so either.
We can only imagine what the Sloanes will write about in this year's shareholder
letter. It will be interesting to see how deeply the state of denial runs and
whether or not there is any awareness of the value destruction that is occurring
at Century.

More recently, Marshall Sloane blamed the yield curve for Century's problems,
yet we see bank after bank reporting record earnings while dealing with the very
same yield curve pressures facing Century. We think that it is now obvious that
it is the Sloanes' management that is responsible for this difference since, in
our view, Century has the advantage of a superior funding base yet doesn't come
close to its peers in profitability. Furthermore, we are greatly troubled by the
year over year decline in core deposits at Century. Core deposits are what make
Century so valuable, and now they seem to be running off. We hope that the board
is embarrassed by a 0.31% ROA and a 4.9% ROE for the fourth quarter. In fact,
one must ask whether it even makes financial sense to go through the exercise
and risk of running the bank when the return is so low.

We are also concerned about management and its responsibilities to the company's
shareholder-owners. After an earlier letter denying our request to meet with the
independent board members, we read in your June 10th press release that "Century
Bank is committed to listening to any shareholder concerns regarding the ongoing
operations and management of the Bank." We recently spoke with an investor that
met with Marshall Sloane, Barry Sloane, Jonathan Sloane, and Paul Cusick at
Century's headquarters in Medford. This investor told us that the conversation
was civil until he questioned some aspects of Century management's strategy and
suggested that the activist shareholders had raised some valid points. The
investor told us that Marshall Sloane became visibly upset and simply said "Sell
your stock." Marshall then said "Interview over" and ended the meeting by
walking away from the meeting table without a word. An apologetic Paul Cusick
was left to walk the investor to the door and stammer an explanation for the
Sloanes' behavior. No CEO, no matter what percentage of the bank he owns, should
be so rude and unprofessional in dealing with a shareholder-owner. If the
Sloanes want to run the bank as though it were private, they should buy back the
shares that they don't control for a fair price. Independent directors are
supposed to be representing shareholders' interests at the company and we hope
that you are as outraged as we are that the Sloanes would treat a shareholder
that way.

We continue to believe that there would be a line of buyers were Century to
explore a sale of the bank. As you might imagine, we have meetings with many
bank management teams as a normal course of our business. While the typical
discussion (unlike one with Century management) involves updates on strategy,
specific growth and expense targets, and other performance metrics, we have
encountered two managements that expressed to us an interest in meeting with the
independent board of Century in order to pursue merger discussions. This is in
addition to the bank CEO that we referenced in an earlier letter. Both of these
managements told us that they had put out feelers to various Century executives
but that the response has been one that suggests no interest in pursuing such
discussions. In case the independent board is not aware, a non-responsive
management team at Century will certainly prevent any formal offer and thus make
it seem as though there is little, if any, interest in the bank by acquirers. We
hope that the board is aware that, in the genteel world of banking where hostile
takeovers are virtually non-existent, an outwardly disinterested CEO is more
than enough to deter potential acquirers.

As we have stated many times, we believe that there are several other banks that
would be willing to pay a significant premium to the current stock price for
Century Bank. Contrast this with the updated outlook of Gerard Cassidy of RBC
Capital Markets. Mr. Cassidy, an independent research analyst who is not in any
way affiliated with our group, has reduced his fundamental price target for
Century shares to $12 per share. Mr. Cassidy cites the declines in net interest
income and higher expenses as reasons for his lowered expectations. We again ask
what board member (indeed, what rational person) would prefer to see a $12 share
price instead of the $46-$57 per share range we have previously estimated to be
Century's value to an acquiring bank.

Finally, we read with great interest that Barry and Jonathon Sloane will be
nominated by their father Marshall to be the Co-CEOs after Marshall's
retirement. We can only note that the decline in Century's profitability and
franchise value under their stewardship as co-chief operating officers has been
truly breathtaking. We wonder how the board will respond to this nomination and
how wide a search will be done for alternative and more effective candidates. Is
it possible that, of all the potential CEO candidates out there, that the Sloane
sons are the most qualified for the job? This is an opportunity for the board to
show the investment community whether Century is run for the interests of the
employment of the Sloane family or as a publicly traded institution owned by
shareholders that are represented by truly independent directors.

We hope that the board wishes to learn more about our conversations with
potential partners that are eager to express their interest in acquiring Century
to the board. We also hope that you would be willing to explain your thinking
about remaining independent with extremely low profitability metrics instead of
taking a large premium for our company. Lastly, we are eager to hear what steps
are being taken to find a suitable successor to Marshall Sloane who has
demonstrated the capability to restore Century's profitability and increase
shareholder value. Thus, in closing, we again call on the independent board
members to meet with us to discuss the above issues.

We will soon file a 13D statement with the SEC with this letter attached as an
exhibit. We look forward to your response in regard to accommodating our request
for a meeting with the independent directors.

Sincerely,

Sy Jacobs
Managing Member
Jacobs Asset Management, LLC
JAM Managers, LLC
As General Partner for JAM Partners, L.P.

Cc: Paul Cusick


                                                                       Exhibit 2
                                                                       ---------

                             Joint Filing Agreement

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as
amended, each of the undersigned hereby agrees that only one statement
containing the information required by Schedule 13D need be filed with respect
to the ownership by each of the undersigned of shares of Class A Common Stock,
$1.00 par value per share, of Century Bancorp, Inc.

This Agreement may be executed in any number of counterparts, each of which
shall be deemed an original.

Executed this 15th day of February, 2006.


JAM PARTNERS, L.P.*

By: JAM Managers L.L.C., its general partner

By: /s/ Sy Jacobs
    -------------------------------
Name:  Sy Jacobs
Title: Managing Member


JAM MANAGERS L.L.C.*

By: /s/ Sy Jacobs
    -------------------------------
Name:  Sy Jacobs
Title: Managing Member


SY JACOBS*

By: /s/ Sy Jacobs
    -------------------------------
Name: Sy Jacobs


CASTINE PARTNERS, LP*

By: /s/ Paul Magidson
    -------------------------------
Name:  Paul Magidson
Title: General Partner


CASTINE PARTNERS II, LP*

By: /s/ Paul Magidson
    -------------------------------
Name:  Paul Magidson
Title: General Partner


CASTINE OFFSHORE FUND, LTD.*

By: /s/ Paul Magidson
    -------------------------------
Name:  Paul Magidson
Title: General Partner


PAUL MAGIDSON*

By: /s/ Paul Magidson
    -------------------------------
Name: Paul Magidson

----------
*    Each of the Reporting Persons specifically disclaims beneficial ownership
     in the Ordinary Shares reported herein except to the extent of the
     Reporting Person's pecuniary interest therein.

SK 01252 0001 644747