. Points of the horse; a treatise on the conformation, movements, breeds and evolution of the horse. Horses. HYRA CO THERIUM, 2QS Paloplotherium, which resembled the Anchitherium and Hipparion in its feet (Fig. 387) ; and the horse tribe, generally, in its teeth.* Its principal digit was much weaker than that of its successors. The foot shown in Fig. 387 is that of a small variety of Paloplotherium. Among the Eocene deposits in America is found the Orohippus agilis\ (Fig. 388), which, as the name given to it by Professor Marsh implies, may be taken as the limit to which we can fairly trace the
. Points of the horse; a treatise on the conformation, movements, breeds and evolution of the horse. Horses. HYRA CO THERIUM, 2QS Paloplotherium, which resembled the Anchitherium and Hipparion in its feet (Fig. 387) ; and the horse tribe, generally, in its teeth.* Its principal digit was much weaker than that of its successors. The foot shown in Fig. 387 is that of a small variety of Paloplotherium. Among the Eocene deposits in America is found the Orohippus agilis\ (Fig. 388), which, as the name given to it by Professor Marsh implies, may be taken as the limit to which we can fairly trace the horse in his character of a one-toed animal. Going further back in the Eocene period, we meet with the Hyracotherium (Fig. 389), which had three toes on its hind feet and four toes on its front feet,. Fig. 389.—HYRACOTHERimi (Jth leal heights and which had hoofs on all of them. It was about 15 inches high, and was closely akin to the tapir, which has maintained its peculiarities of conformation, up to the present day, almost without change, during that vast period of time. * The teeth of the Paloplotherium have a plentiful supply of crusta petrosa (cement), and thus resemble those of the hoise. I may explain that the cement is the outer layer of the teeth. In youth, it forms a thm covering to the enamel on the outside ; and a thick one m the depressions which all the teeth, with the exception of the tushes, have on their crowns. The cement becomes quickly stained by the action of the food and gives the "mark" m the teeth its charac- teristic dark appearance. The front teeth of the horse become white with age from the wearing away of the cement. t ^Opos-, limit; tTTTroy, 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 Hayes, M. Horace (Matthew Horace), 1842-1904. London, W. Thacker &
Size: 2138px × 1168px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjecthorses, bookyear1897
