SECURITIES AND EXCHANGE COMMISSION

                                  Washington, D.C. 20549

                                       ____________

                                      FORM 8-A12G/A

                                   AMENDMENT NO. 1 TO
                           REGISTRATION STATEMENT ON FORM 8-A

                    FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                         PURSUANT TO SECTION 12(b) OR (g) OF THE
                           SECURITIES EXCHANGE ACT OF 1934

                               Cullen/Frost Bankers, Inc.
             -------------------------------------------------------------
               (Exact name of registrant as specified in its charter)


                             Texas                          74-1751768
             ----------------------------------------    ----------------
             (State of incorporation or organization)    (IRS Employer 
                                                       Identification No.)


                      P.O. Box 1600
                      100 West Houston Street
                      San Antonio, Texas                      78296
             ----------------------------------------       ----------
             (Address of principal executive offices)       (Zip Code)


             Securities registered pursuant to Section 12(b) of the Act:


             Title of each class                 Name of each exchange on which
             to be so registered                 each class is to be registered
             -------------------                 ------------------------------

                    None                                      None 

             Securities to be registered pursuant to Section 12(g) of the Act:


                             Preferred Share Purchase Rights
           -----------------------------------------------------------------
                                    (Title of Class)




Item 1.      Description of Registrant's Securities to be Registered.
             -------------------------------------------------------

            On July 25, 1989, the Board of Directors of Cullen/Frost Bankers, 
Inc., a Texas corporation (the "Company"), declared a dividend of one preferred 
share purchase right (a "Right") for each share of common stock, par value 
$5.00 per share ("Common Stock"), of the Company held of record at the close of 
business on August 1, 1989 (the "Record Date"), or issued thereafter and prior 
to the Separation Time (as defined in the Original Rights Agreement described 
below).  The Rights were issued pursuant to a Rights Agreement, dated as of 
July 25, 1989, between the Company and The Bank of New York, as rights agent 
(the "Original Rights Agreement").  On July 30, 1996, the Company amended and 
restated the Original Rights Agreement in its entirety (the "Restated Rights 
Agreement") and appointed The Frost National Bank to replace The Bank of New 
York, as Rights Agent.  The terms of the Rights, as so amended, are summarized 
herein.

            Each Right entitles its registered holder to purchase from the 
Company, after the Separation Time, one one-hundredth of a share of Junior 
Participating Preferred Stock, par value $5.00 per share (the "Preferred 
Stock"), for $100 (the "Exercise Price"), subject to adjustment.  The Rights 
will be evidenced by the Common Stock certificates until the close of business 
on the earlier of the date (either, the "Separation Time") which is (i) the 
tenth business day (or such later date as the Board of Directors of the Company 
may from time to time fix by resolution adopted prior to the Separation Time 
that would otherwise have occurred) after the date on which any Person (as 
defined in the Restated Rights Agreement) commences a tender or exchange offer 
which, if consummated, would result in such Person's becoming an Acquiring 
Person, as defined below, or (ii) the tenth business day (or such earlier or 
later date as the Board of Directors of the Company may from time to time fix 
by resolution adopted prior to the Flip-in Date (as defined below) that would 
otherwise have occurred) after the first date of public announcement by the 
Company that such Person has become an Acquiring Person (the "Flip-in Date"); 
provided that if a tender or exchange offer referred to in clause (i) is 
- --------
cancelled, terminated or otherwise withdrawn prior to the Separation Time 
without the purchase of any shares of stock pursuant thereto, such offer shall 
be deemed never to have been made.  An Acquiring Person is any Person who is 
the Beneficial Owner (as defined in the Restated Rights Agreement) of 10% or 
more of the outstanding shares of Common Stock, provided, however, such term 
                                                --------  -------
shall not include (i) the Company, any wholly-owned subsidiary of the Company 
or any employee stock ownership or other employee benefit plan of the Company, 
(ii) any person who is the Beneficial Owner of 10% or more of the outstanding 
Common Stock as of the date of the Restated Rights Agreement or who shall 
become the Beneficial Owner of 10% or more of the outstanding Common Stock 
solely as a result of an acquisition of Common Stock by the Company, until such 
time as such Person acquires additional Common Stock, other than through a 
dividend or stock split, (iii) any Person who becomes an Acquiring Person 
without any plan or intent to seek or affect control of the Company if such 
Person promptly

                                  -2-


divests sufficient securities such that such 10% or greater Beneficial 
Ownership ceases or (iv) any Person who Beneficially Owns shares of Common 
Stock consisting solely of (A) shares acquired pursuant to the grant or 
exercise of an option granted by the Company in connection with an agreement to 
merge with, or acquire, the Company prior to a Flip-in Date, (B) shares owned 
by such Person and its Affiliates and Associates at the time of such grant, (C) 
shares, amounting to less than 1% of the outstanding Common Stock, acquired by 
Affiliates and Associates of such Person after the time of such grant or (D) 
shares which are held by such Person in trust accounts, managed accounts and 
the like or otherwise held in a fiduciary capacity, that are beneficially owned 
by third persons who are not Affiliates or Associates of such Person or acting 
together with such Person to hold shares, or which are held by such Person in 
respect of a debt previously contracted.  The Restated Rights Agreement 
provides that, until the Separation Time, the Rights will be transferred with 
and only with the Common Stock.  Common Stock certificates issued prior to the 
Separation Time shall evidence one Right for each share of Common Stock 
represented thereby and shall contain a legend incorporating by reference the 
terms of the Restated Rights Agreement (as such may be amended from time to 
time).  Notwithstanding the absence of the aforementioned legend, certificates 
evidencing shares of Common Stock outstanding on or prior to the Record Date or 
which bear an earlier form of legend shall also evidence one Right for each 
share of Common Stock evidenced thereby.  Promptly following the Separation 
Time, separate certificates evidencing the Rights ("Rights Certificates") will 
be mailed to holders of record of Common Stock at the Separation Time.

            The Rights will not be exercisable until the Business Day (as 
defined in the Restated Rights Agreement) following the Separation Time.  The 
Rights will expire on the earlier of (i) the close of business on July 25, 1999 
and (ii) the date on which the Rights are redeemed as described below (in any 
such case, the "Expiration Time").

            The Exercise Price and the number of Rights outstanding, or in 
certain circumstances the securities purchasable upon exercise of the Rights, 
are subject to adjustment from time to time to prevent dilution in the event of 
a Common Stock dividend on, or a subdivision or a combination into a smaller 
number of shares of, Common Stock, or the issuance or distribution of any 
securities or assets in respect of, in lieu of or in exchange for Common Stock.

            In the event that prior to the Expiration Time a Flip-in Date 
occurs, each Right (other than Rights Beneficially Owned by the Acquiring 
Person or any affiliate or associate thereof, which Rights shall become void) 
shall constitute the right to purchase from the Company, upon the exercise 
thereof in accordance with the terms of the Restated Rights Agreement, that 
number of shares of Common Stock of the Company having an aggregate Market 
Price (as defined in the Restated Rights Agreement), on the date of the public 
announcement of an Acquiring Person's becoming such (the "Stock Acquisition 
Date") that

                                  -3-


gave rise to the Flip-in Date, equal to twice the Exercise Price for an amount 
in cash equal to the then current Exercise Price.  In addition, the Board of 
Directors of the Company may, at its option, at any time after a Flip-in Date 
and prior to the time an Acquiring Person becomes the Beneficial Owner of more 
than 50% of the outstanding shares of Common Stock, elect to exchange all (but 
not less than all) the then outstanding Rights (other than Rights Beneficially 
Owned by the Acquiring Person or any affiliate or associate thereof, which 
Rights become void) for shares of Common Stock at an exchange ratio of one 
share of Common Stock per Right, appropriately adjusted to reflect any stock 
split, stock dividend or similar transaction occurring after the date of the 
Separation Time (the "Exchange Ratio").  Immediately upon such action by the 
Board of Directors (the "Exchange Time"), the right to exercise the Rights will 
terminate and each Right will thereafter represent only the right to receive a 
number of shares of Common Stock equal to the Exchange Ratio.

            Whenever the Company shall become obligated under the preceding 
paragraph to issue shares of Common Stock upon exercise of or in exchange for 
Rights, the Company, at its option, may substitute therefor shares of Preferred 
Stock, at a ratio of one one-hundredth of a share of Preferred Stock for each 
share of Common Stock so issuable.

            In the event that prior to the Expiration Time the Company enters 
into, consummates or permits to occur a transaction or series of transactions 
after the time an Acquiring Person has become such in which, directly or 
indirectly, (i) the Company shall consolidate or merge or participate in a 
binding share exchange with any other Person if, at the time of the 
consolidation, merger or share exchange or at the time the Company enters into 
an agreement with respect to such consolidation, merger or share exchange, the 
Acquiring Person Controls the Board of Directors of the Company (as defined in 
the Restated Rights Agreement) and either (A) any term of or arrangement 
concerning the treatment of shares of capital stock in such merger, 
consolidation or share exchange relating to the Acquiring Person is not 
identical to the terms and arrangements relating to other holders of Common 
Stock or (B) the Person with whom the transaction or series of transactions 
occurs is the Acquiring Person or an Affiliate or Associate of the Acquiring 
Person, (ii) the Company shall sell or otherwise transfer (or one or more of 
its subsidiaries shall sell or otherwise transfer) assets (A) aggregating more 
than 50% of the assets (measured by either book value or fair market value) or 
(B) generating more than 50% of the operating income or cash flow, of the 
Company and its subsidiaries (taken as a whole) to any other Person (other than 
the Company or one or more of its wholly-owned subsidiaries) or to two or more 
such Persons which are affiliated or otherwise acting in concert, if, at the 
time such sale or transfer of assets or at the time the Company (or any such 
subsidiary) enters into an agreement with respect to such sale or transfer, the 
Acquiring Person Controls the Board of Directors of the Company (a "Flip-over 
Transaction or Event") or (iii) any Acquiring Person shall (A) sell, purchase, 
lease, exchange, mortgage, pledge,

                                  -4-


transfer or otherwise acquire or dispose of, to, from, or with, as the case may 
be, the Company or any of its Subsidiaries, over any period of 12 consecutive 
calendar months, assets (x) having an aggregate fair market value of more than 
$15,000,000 or (y) on terms and conditions less favorable to the Company than 
the Company would be able to obtain through arm's-length negotiations with an 
unaffiliated third party, (B) receive any compensation for services from the 
Company or any of its Subsidiaries, other than compensation for full-time 
employment as a regular employee at rates in accordance with the Company's (or 
its Subsidiaries') past practices, (C) receive the benefit, directly or 
indirectly (except proportionately as a shareholder), over any period of 12 
consecutive calendar months, of any loans, advances, guarantees, pledges, 
insurance, reinsurance or other financial assistance or any tax credits or 
other tax advantage provided by the Company or any of its Subsidiaries 
involving an aggregate principal amount in excess of $5,000,000 or an aggregate 
cost or transfer of benefits from the Company or any of its Subsidiaries in 
excess of $5,000,000 or, in any case, on terms and conditions less favorable to 
the Company than the Company would be able to obtain through arm's-length 
negotiations with a third party, or (D) increase by more than 1% its 
proportionate share of the outstanding shares of any class of equity securities 
or securities convertible into any class of equity securities of the Company or 
any of its Subsidiaries as a result of any acquisition from the Company (with 
or without consideration), any reclassification of securities (including any 
reverse stock split), or recapitalization, of the Company, any merger or 
consolidation of the Company or any other transaction or series of transactions 
(whether or not with or into or otherwise involving an Acquiring Person), the 
Company shall take such action as shall be necessary to ensure, and shall not 
enter into, consummate or permit to occur such Flip-over Transaction or Event 
until it shall have entered into a supplemental agreement with the Person 
engaging in such Flip-over Transaction or Event or the parent corporation 
thereof (the "Flip-over Entity"), for the benefit of the holders of the Rights, 
providing, that upon consummation or occurrence of the Flip-over Transaction or 
Event (i) each Right shall thereafter constitute the right to purchase from the 
Flip-over Entity, upon exercise thereof in accordance with the terms of the 
Restated Rights Agreement, that number of shares of common stock of the Flip-
over Entity having an aggregate Market Price on the date of consummation or 
occurrence of such Flip-over Transaction or Event equal to twice the Exercise 
Price for an amount in cash equal to the then current Exercise Price and (ii) 
the Flip-over Entity shall thereafter be liable for, and shall assume, by 
virtue of such Flip-over Transaction or Event and such supplemental agreement, 
all the obligations and duties of the Company pursuant to the Restated Rights 
Agreement.  For purposes of the foregoing description, the term "Acquiring 
Person" shall include any Acquiring Person and its Affiliates and Associates 
counted together as a single Person.

            The Board of Directors of the Company may, at its option, at any 
time prior to the close of business on the Flip-in Date, redeem all (but not 
less than all) the then outstanding Rights at a price of $.01

                                  -5-


per Right (the "Redemption Price"), as provided in the Restated Rights 
Agreement.  Immediately upon the action of the Board of Directors of the 
Company electing to redeem the Rights, without any further action and without 
any notice, the right to exercise the Rights will terminate and each Right will 
thereafter represent only the right to receive the Redemption Price in cash for 
each Right so held.

            The holders of Rights will, solely by reason of their ownership of 
Rights, have no rights as shareholders of the Company, including, without 
limitation, the right to vote or to receive dividends.

            The Restated Rights Agreement (which includes as Exhibit A the 
forms of Rights Certificate and Election to Exercise) is attached hereto as an 
exhibit and is incorporated herein by reference.  The foregoing description of 
the Rights is qualified in its entirety by reference to the Restated Rights 
Agreement and such exhibit thereto.

Item 2.    Exhibits.
           --------

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

     1             Amended and Restated Rights Agreement.

     2             Form of Rights Certificate and of Election to Exercise,
                   included in Exhibit A to the Restated Rights Agreement.

     3             Form of Statement of Resolution Establishing Series of 
                   Shares of Participating Junior Preferred Stock, included
                   in Exhibit B to the Restated Rights Agreement.




                                  -6-



                                   SIGNATURE

            Pursuant to the requirements of Section 12 of the Securities 
Exchange Act of 1934, the registrant has duly caused this registration 
statement to be signed on its behalf by the undersigned, thereunto duly 
authorized.

                             CULLEN/FROST BANKERS, INC.



                             By  /s/
                                 ----------------------------
                                 Name:  
                                 Title: 



Date:  August __, 1996



                                  -7-






                               EXHIBIT INDEX



Exhibit                                                Sequential
No.                   Description                      Page Numbers
- -------               --------------------             ------------

 (1)                  Amended and Restated Rights
                      Agreement, dated as of 
                      July 30, 1996 (the "Restated 
                      Rights Agreement"), between 
                      Cullen/Frost Bankers, Inc. and 
                      The Frost National Bank, as 
                      Rights Agent.

 (2)                  Form of Rights Certificate and 
                      of Election to Exercise, included 
                      as Exhibit A to the Restated 
                      Rights Agreement 
                      (Exhibit 1 hereto).

 (3)                  Form of Statement of Resolution 
                      Establishing Series of Shares of 
                      Participating Junior Preferred Stock, 
                      included as Exhibit B to the Restated 
                      Rights Agreement (Exhibit 1 hereto).


                                  -8-