. College collection of palaeontology. MAMMALIA. 13 No. 16. Equus fossilis. Molar. Remains of the fossil Horse have been found in the uppermost Tertiaries and the Quaternary of many parts of Europe and America. These remains are in the main mohxr and incisor teeth, which are usually noted under tlie name of E. fossilLs, altliough some authors undertake to dis- tinguish several species. This specimen is from the Quater- nary beds of Piedmont, No. 17. [83] Hipparion elegans, Christol. Left Hind Foot (cast). This little equine quadruped was tridactyl; for while the two splint-bones alone
. College collection of palaeontology. MAMMALIA. 13 No. 16. Equus fossilis. Molar. Remains of the fossil Horse have been found in the uppermost Tertiaries and the Quaternary of many parts of Europe and America. These remains are in the main mohxr and incisor teeth, which are usually noted under tlie name of E. fossilLs, altliough some authors undertake to dis- tinguish several species. This specimen is from the Quater- nary beds of Piedmont, No. 17. [83] Hipparion elegans, Christol. Left Hind Foot (cast). This little equine quadruped was tridactyl; for while the two splint-bones alone are retained in the Horse, Zebra and Ass, in the Hipparion they terminated in small digits and hoofs. Such a foot was better adapted for swampy soil, as it would not sink so deeply. The hoofs dangled behind like the spurious hoofs of the Ox. The Hipparion was the first transitional form discovered between the Eocene Perissodactyla .and the modern Horse, and its discovery supplied a powerful argument for the development hypothesis. This specimen was found in the lower Pliocene at Cucurron, France, and belongs to the Museum of Natural History in Lyons. Size, 14 x 13. No. 18. [85] Anchitherium Bairdii, Leidy. Skull and Lower Jaw (cast). This old-toed Ungulate resembles the PalMotherium in its dental structure, but is very much like the Horse in its skeleton. The cranium has a short sagittal crest and a large, broad forehead; the skull is relatively shorter than that of the Horse; each jaw contains six incisors, two canines, and seven molars. It is near to Mio'hipp\is, Marsh. These remains were found in the Mauvaises Terres (Miocene), Nebraska, and are preserved in the Museum of the Academy of Natural Sciences, Philadel- phia. Size, G X 4. FAMILY PAL2E0THERIDiE. This group is closely related to the early members of the Equidw, and Cope includes here some of the supposed ancestors of the Horse. The family is entirely extinct since the Please note that these images are ext
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