Simpson, George Gaylord, 1902-2005-10-062005-10-061932http://hdl.handle.net/2246/20317 p. : ill. ; 24 cm.Includes bibliographical references.3072938 bytesapplication/pdfen-USQL1 .A436 no.587, 1932Eohippus venticolus.Merychippus isonesus quintus.Hesperosiren crataegensis.Skeleton.Mammals, Fossil.Mounted skeletons of Eohippus, Merychippus and Hesperosiren. American Museum novitates ; no. 587Eohippus, Merychippus and Hesperosirentext