Simpson, George Gaylord, 1902-Scarritt Patagonian Expedition 1930-1931)2005-10-062005-10-061933http://hdl.handle.net/2246/204919 p. : ill. ; 24 cm.Includes bibliographical references (p. 19).2154245 bytesapplication/pdfen-USQL1 .A436 no.622, 1933Phenacodus primaevus.Notostylops.Rhyphodon.Brain.Casts.Skull.Ungulates, Fossil -- South America.Mammals, Fossil -- South America.Paleontology -- South America.Braincasts of Phenacodus, Notostylops, and Rhyphodon. American Museum novitates ; no.622Brain casts of Phenacodus, Notostylops, and Rhyphodontext