SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

SCHEDULE TO
(RULE 14D-100)

TENDER OFFER STATEMENT UNDER SECTION 14(D)(1) OR 13(E)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 18)

DIME BANCORP, INC.
(Name of Subject Company (Issuer))

NORTH FORK BANCORPORATION, INC.
(Name of Filing Person (Offeror))

COMMON STOCK, $0.01 PAR VALUE PER SHARE
(Title of Class of Securities)

00025429 Q1
(CUSIP Number of Class of Securities)

JOHN ADAM KANAS
CHAIRMAN, PRESIDENT
AND CHIEF EXECUTIVE OFFICER
NORTH FORK BANCORPORATION, INC.
275 BROADHOLLOW ROAD
MELVILLE, NEW YORK 11747
(631) 844-1004

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications on behalf of Filing Person)

Copy to:

WILLIAM S. RUBENSTEIN, ESQ.
SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
4 TIMES SQUARE
NEW YORK, NEW YORK 10036
(212) 735-3000

[ ] Check the box if the filing relates solely to preliminary
communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which
the statement relates:
[x] third-party tender offer subject to Rule 14d-1.
[ ] issuer tender offer subject to Rule 13e-4.
[ ] going-private transaction subject to Rule 13e-3.
[ ] amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the
results of the tender offer: [ ]

This Amendment No. 18 (this "Amendment No. 18") amends and supplements the Tender Offer Statement on Schedule TO, dated March 15, 2000, as amended (the "Schedule TO"), filed by North Fork Bancorporation, Inc., a Delaware corporation ("North Fork"), and Fleet Boston Corporation, a Rhode Island corporation ("FleetBoston"), relating to the offer (the "Offer") by North Fork to exchange each issued and outstanding share of common stock, par value $0.01 per share (the "Dime Shares"), of Dime Bancorp, Inc., a Delaware corporation ("Dime"), for 0.9302 shares of common stock, par value $0.01 per share (the "North Fork Shares"), of North Fork and $2.00 in cash, on the terms and subject to the conditions described in the Prospectus (as defined below).

On May 15, 2000, North Fork filed Amendment No. 3 to its registration statement on Form S-4 with the Securities and Exchange Commission relating to the North Fork Shares to be issued to stockholders of Dime in the Offer (the "Registration Statement"). The terms and conditions of the Offer are set forth in the preliminary prospectus dated May 15, 2000, which is a part of the Registration Statement (the "Prospectus"), and the related Letter of Transmittal, which are annexed to the Schedule TO as Exhibits (a)(20) and (a)(2), respectively.

ITEM 11. ADDITIONAL INFORMATION.

Item 11 of the Schedule TO is hereby amended and supplemented
as follows:

On July 7, 2000, North Fork issued a press release. A copy of the press release is filed herewith as Exhibit (a)(28) and the information set forth in the press release is incorporated herein by reference.

ITEM 12. EXHIBITS.

Item 12 is hereby amended and supplemented as follows:

(a)(28) Text of press release issued by North Fork on July 7, 2000

SIGNATURE

After due inquiry and to the best of my knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: July 10, 2000

NORTH FORK BANCORPORATION, INC. 

By: /s/ Daniel M. Healy
    -----------------------------------------
    Name:  Daniel M. Healy
    Title: Executive Vice President and
           Chief Financial Officer


                               EXHIBIT INDEX

EXHIBIT
NUMBER      DESCRIPTION
------      -----------

(a)(28)     Text of press release issued by North Fork on July 7, 2000

Exhibit (a)(28)

FOR IMMEDIATE RELEASE INVESTOR: DANIEL M. HEALY

EXECUTIVE VICE PRESIDENT
CHIEF FINANCIAL OFFICER 

            631-844-1258

PRESS:      KEKST AND COMPANY
            ROBERT D. SIEGFRIED
            212-521-4832

NORTH FORK RESPONDS TO DIME STATEMENTS

MELVILLE, N.Y. - JULY 7, 2000 - (NYSE:NFB) In response to assertions that officials at Dime Bancorp, Inc. have told several of their shareholders today that North Fork Bancorporation, Inc. was given an opportunity to be involved in their process, but refused to sign a confidentiality agreement, John Adam Kanas, Chairman and Chief Executive Officer of North Fork said, "I can say unequivocally and without qualification that no one at North Fork or any of its advisors had any conversations with anyone at Dime or any of its advisors relating in any way to the subject of North Fork entering into a confidentiality/standstill agreement with Dime. Obviously, we would never have agreed to a standstill that would have impeded our exchange offer; however, it is categorically untrue that such an offer was ever made by Dime."

* * * * *

Investors and security holders are advised to read North Fork's registration statement and tender offer statement with respect to its exchange offer for Dime common stock, North Fork's proxy statement with respect to North Fork's proposed solicitation of proxies from Dime stockholders in connection with Dime's 2000 annual meeting of stockholders, and any amendments or supplements to any of such documents (when they become available), because each of these documents contains, or will contain, important information. Investors and security holders may obtain a free copy of the exchange offer registration statement, the tender offer statement, the proxy statement, any amendments or supplements to any of such documents (when they become available), and any other documents filed by North Fork with the SEC, at the SEC's Internet web site at www.sec.gov. Each of these documents may also be obtained free of charge by overnight mail or direct electronic transmission by calling North Fork's information agent, D.F. King & Co., Inc. toll-free at 1-800-755-7250.