Book reviewed in this article:THE NEW WORLD PRIMATES: By M. MoynihanTHE SECRETION OF MILK: By Ben Mepham. Edward ArnoldVARIABILITY OF MAMMALS: By A. V. YablokovTHE MAMMALIAN EAR: By I. FriedmannTHE ROLE OF LARGE HERBIVORE MAMMALS IN WOODLAND ECOSYSTEMS: Polish Ecological StudiesFALLOW DEER.Their history, distribution and biology By Donald and Norma Chapman.THE LIFE OF MAMMALS.Their anatomy and physiology By J. Z. YoungTHE BROWN RAT: By Graham Twigg. 1976. Newton Abbot, David&CharlesDEER IN THE NEW FOREST: By John JacksonDENTITION OF LIVING PRIMATES: By Daris R. Swindler