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Paleocene Faunas of the San Juan Basin, New Mexico

Naturevolume 140pages4647 (1937) | Download Citation



GREAT strides have been made in recent years in the field of mammalian palæontology, and the evolution of some at least of the orders of mammals are now set out with a great wealth of detail. Osborn's great monograph of the Titano-theres, for example, or his history of the Pro-boscidea, of which the first volume has recently appeared, show in a very striking manner not only how great is the amount of material on which to work, but also how complex has been the course of evolution of the mammalian orders. These works, however, and others similar, do not, as a rule, begin their story before "the Eocene, by which time the orders dealt with had become well established. Their 'pre-history' and inter-relationships, therefore, are not elucidated.

Paleocene Faunas of the San Juan Basin, New Mexico

By W. D. Matthew. (Transactions of the American Philosophical Society, New Series, Vol. 30.) Pp. viii + 510 + 65 plates. (Philadelphia: American Philosophical Society; London: Oxford University Press, 1937.) 22s. 6d. net.

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