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By: Simpson, George Gaylord, - Scarritt Patagonian ExpeditionEdition:Publication info: New York City, The American Museum of Natural History, [1933]Volume: no.622 (1933)Series:Holding Institution: American Museum of Natural History LibrarySubjects: 56.9:14.71,5 Brain Casts Mammals, Fossil Notostylops Paleontology Phenacodus primaevus Rhyphodon Skull South America Ungulates, FossilBHL Collections: