A History of Land Mammals in the Western Hemisphere

ancestors ancient appearance armadillos artiodactyls beds bones bony Bridger camels canine carnivorous character claws continent coössified creatures creodonts crest cusps deer dentition Deseado digits elephants elongate Eocene epoch extinct fauna feet femur fore-arm foreodonts formation forms fossils genera genus grinding teeth ground-sloths hemisphere hoofed animals horns horses humerus hypsodont incisors known larger latter less limbs Litopterna lower jaw lower Miocene lower molar Macrauchenia mammalian mammals manus marsupials middle Miocene Mioc Miocene modern molars Museum N.Y. Zoölog nasal nearly neck North America northern Old World Oligo Oligocene pair Paleocene Pampean peccaries perissodactyls phyla phylum Pleist Pleistocene Pliocene posterior premolars primitive probably Proboscidea region represented rhinoceroses sagittal crest Santa Cruz short skeleton skull slender smaller South species stage structure suborder tail tapirs Tertiary third trochanter Toxodon transverse tusks Uinta ungulates upper Miocene upper molars vertebræ Wasatch White River