Author: Leidy, J.
Title: Extinct species of American ox.
Description: Washington, DC, Smithsonian Institution, 1853. 4to (31.5 x 23.5 cm). 20 pp.; five lithographed plates. Disbound. = Joseph Leidy's rare work on extinct North American oxen. The American Buffalo is the only remaining species in the America's, but in the 19th century it was very close to becoming extinct too. Published in a rare early volume of the Institute's Contributions to Knowledge. A very good, clean copy.

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