. Bulletin - American Museum of Natural History. Natural history; Science. 386 Btdletin American Museum of Natural History. [Vol. XXII, than any species of Oligocene horse and compares in degree of pro- gression with the earHer species of Hypohippus and Parahippns. From Mesohippiis and Miokippus this genus is clearly distin- guished by (i) the complete union of the metaloph with the ectoloph in the upper molariform teeth; (2) the proportionally larger size of the protoconule; (3) the greater lengthening of the anterior portion of the skull, as shown in the comparatively longer muzzle; (4) the
. Bulletin - American Museum of Natural History. Natural history; Science. 386 Btdletin American Museum of Natural History. [Vol. XXII, than any species of Oligocene horse and compares in degree of pro- gression with the earHer species of Hypohippus and Parahippns. From Mesohippiis and Miokippus this genus is clearly distin- guished by (i) the complete union of the metaloph with the ectoloph in the upper molariform teeth; (2) the proportionally larger size of the protoconule; (3) the greater lengthening of the anterior portion of the skull, as shown in the comparatively longer muzzle; (4) the more backward position of the orbit, and (5) the great development of the lachrymal and malar fossae. It differs from Parahippus in (i) the absence or but slight development of a crochet on the metaloph;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Museum of Natural History; Allen, J. A. (Joel Asaph), 1838-1921. New York [American Museum of Natural History]
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