Oliver Perry Hay

Oliver Perry Hay (born May 22, 1846, Saluda, Ind., U.S.—died Nov. 2, 1930, Washington, D.C.) was an American paleontologist who did much to unify existing knowledge of North American fossil vertebrates by constructing catalogs that have become standard references. While serving as professor of biology and geology at Butler University, Indianapolis, Ind. (1879–92), he helped organize the Indiana Academy of Science (1890) and embarked on his first paleontological expedition (1889), studying fossils in western Kansas....