British Printing & Communication Corp. of London...

British Printing & Communication Corp. of London announced that it has agreed to acquire Webb Co., a St. Paul, Minn.-based printing and publishing group that specializes in color printing, for $16.75 a share, or $117 million . . . San Francisco-based C-P National said it has broken off negotiations concerning a possible merger with Pacific Corp. . . . Gelco Corp. of Edan Prairie, Minn., said it is reviewing a takeover offer valued at more than $250 million from an investor group led by Coniston Partners, a New York-based investment partnership. . . . Potlatch Corp. increased its quarterly dividend to 42 cents per share from 39 cents, payable Dec. 1 to shareholders of record Nov. 12 . . . Monsanto Co. said it will record an after-tax gain of $114 million, or $1.46 per share, in the third quarter ended Sept. 30 . . . Control Data has adopted a stockholder rights plan in which one preferred stock purchase right will be distributed as a dividend on each outstanding share of its common stock.