SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 10-K

[X]      Annual  report  pursuant  to  Section  13 or  15(d)  of the  Securities
         Exchange Act of 1934 for the period from June 30, 1997 (Commencement of
         Operations) to December 31, 1997

[  ]     Transition report pursuant to Section 13 or 15(d) of the
         Securities Exchange Act of 1934 for the transition period from   to


                         Commission File Number 333-25751


      CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP., SERIES 1997-C1
             (Exact name of registrant as specified in its charter)


       Delaware                                               13-3320910
State or Other Jurisdiction                                 (IRS Employer
   of Incorporation )                                      Identification No.)

Eleven Madison Ave.
 New York, New York                                            10010
(Address of Principal                                         (Zip Code)
    Executive Offices)

       Registrant's telephone number, including area code :(212)325-2000


Securities registered pursuant to Section 12(b) of the Act:  None
Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. Yes X No

     Indicate by check mark if disclosure of delinquent  filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [X]

Documents incorporated by reference:  None

                Page 1 of 4                       This report consists of 6
                                                  consecutively numbered pages.


<PAGE>

CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP., SERIES 1997-C1

TABLE OF CONTENTS
                                                                        Page

PART I
Item  1. Business.........................................................3

Item  2. Properties.............................................. ........3

Item  3. Legal Proceedings................................................3

Item  4. Submission of Matters to a Vote of Security Holders..............3


PART II
Item  5. Market for Registrant's Common Equity and Related
                           Stockholder Matters............................3

Item  6. Selected Financial Data..........................................3

Item  7. Management's Discussion and Analysis of Financial
                           Condition and Results of Operations............3

Item  8. Financial Statements and Supplementary Data......................3

Item  9. Changes in and Disagreements with Accountants on
                          Accounting and Financial Disclosure.............3


PART III
Item 10. Directors and Executive Officers of the Registrant...............3

Item 11. Executive Compensation...........................................3

Item 12. Security Ownership of Certain Beneficial Owners and Management.. 3

Item 13. Certain Relationships and Related Transactions...................3

PART IV
Item 14. Exhibits, Financial Statement Schedules and Reports on
           Form 8-K.......................................................4

SIGNATURE.................................................................5

Supplemental Information to be Furnished with Reports Filed Pursuant to Section
15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to
Section 12 of the Act.....................................................6

                                      -2-


<PAGE>


PART I


Item 1.  Business

Omitted.

Item 2.  Properties

Omitted.

Item 3.  Legal Proceedings

The  Registrant is not aware of any material legal  proceeding  with respect to,
the Company, the Master Servicer or the Trustee, as related to the Trust,
other than  ordinary  routine  litigation  incidental to the duties
of the  Trustee or  Servicer  under the  related  Pooling  and  Servicing
Agreement.

Item 4.  Submission of Matters to a Vote of Security Holders

No  matter  was  submitted  to a vote  or  consent  of  Holders  of the  Offered
Certificates during the fiscal year covered by this report.


PART II


Item 5.  Market for Registrant's Common Equity and Related Stockholder Matters

The Trust does not issue stock.  There is currently no established secondary
market for the Certificates.  As of  January  2,  1997,  the number
of holders  of each  Class  of  Offered  Certificates were 78.

Item 6.  Selected Financial Data

Omitted.

Item 7.  Management's Discussion and Analysis of Financial condition and
         Results of Operations

Omitted.

Item 8.  Financial Statements and Supplementary Data

Omitted.

Item 9.  Changes in and Disagreements with Accountants on Accounting and
         Financial Disclosure

There was no change of  accountants  or  disagreement  with  accountants  on any
matter of accounting principles or practices or financial disclosure.


PART III


Item 10. Directors and Executive Officers of the Registrant

Omitted.

Item 11. Executive Compensation

Omitted.

Item 12. Security Ownership of Certain Beneficial Owners and Management

Omitted

Item 13. Certain Relationships and Related Transactions

Omitted.

                                      -3-

<PAGE>

PART IV

Item 14. Exhibits, Financial Statement Schedules and Reports on Form 8-K

(a)      The following documents are filed as part of this report:

         (1) Financial Statements:

              Omitted.

         (2)  Financial Statement Schedules:

              Omitted.

         (3)  Exhibits:

              Omitted

(b)   Reports on Form 8-K:  The following Current Reports on Form 8-K were
      filed by the Registrant  during the last quarter of 1997.

A Current  Report on Form 8-K, dated December 3, 1997, was filed for the purpose
of filing the Monthly Certificateholder  Statements for payments made on October
20, 1997 and  November  20, 1997,  respectively.  A Current  Report on Form 8-K,
dated  January  5,  1998,  was  filed for the  purpose  of  filing  the  Monthly
Certificateholder  Statement  for payment made on December  22, 1997.  The items
reported in such Current Report were Item 5 (Other Events).

(c)      Exhibits to this report are listed in Item (14)(a)(3) above.

                                      -4-

<PAGE>



SIGNATURE

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  registrant  has duly  caused  this report to be signed on its
behalf by the undersigned thereunto duly authorized.

                                 THE CHASE MANHATTAN BANK,
                                  not in its individual capacity but solely as
                                  Trustee under the Agreement referred to herein

Date: March 31, 1998             By:  /s/  Norma Catone
                                   Norma Catone
                                   Chase Manhattan Bank
                                   Vice President


                                      -5-

<PAGE>



SUPPLEMENTAL  INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT TO SECTION
15(D) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED SECURITIES PURSUANT TO
SECTION 12 OF THE ACT.

The  registrant  has not sent an annual report or proxy material to its security
holders.  The registrant  will not be sending an annual report or proxy material
to its security holders subsequent to the filing of this form.

                                      -6-