Review of the Mammal-Bearing Tertiary of South America

Pp. (2), 649-709; some text-figures and maps.  Publisher’s original self-wrappers with publisher’s stiff card cover, lg 8vo.  Proceedings of the American Philosophical Society, volume 83.  Simpson has written numerous papers on the evolution of mammals in South America.  This small monograph presents his view in 1940.  This is the original offprint issued by the publisher.  From the research library of marine vertebrate paleontologist Edward D. Mitchell with his signature on the front wrapper.  Rare work.