Contents

11 March 1977
Vol 195, Issue 4282

About The Cover

Two species of North American cats. (Top) Restoration of extinct, cheetah-like cat (Felis trumani), late Pleistocene, North America; (bottom) living mountain lion (Felis concolor), late Pleistocene and recent of North and South America. See page 981. [Drawings by D. Adams]