THOMASINA (288 pp.)Paul GallicoDoubleday ($3.95).
A cat is a cat is a cat
Neither human nor divine
Like the plant of Miss Gertrude Stein
Which was, as everybody knows,
Neither more nor less than thatA rose.
Paul Gallico has written a highly sentimental novel about a catand there is no one quite so sentimental as a 200-lb. ex-sportswriter (a type who can weep real tears over a carload of redundant wrestlers). Gallico's cat Thomasina should go down in literary history as an outstanding example of the pathetic fallacy, i.e., the attribution of human emotions to nonhuman objects....