. Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement. Breeding; Domestic animals; Plants, Cultivated; Animals, Domestic; Breeding; Plants. 214 DOMESTICATED AXIMALS AND PLANTS W'e know that several horselike forms developed in South America, but that all perished for one cause or another, one at least from soft teeth. It is exceedingly remarkable that while the North American horse progressed almost up to the modem Head Fore Foot Hind Foot Teeth. Protohippus !Mesohippiis Protorohippus H\Ta
. Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement. Breeding; Domestic animals; Plants, Cultivated; Animals, Domestic; Breeding; Plants. 214 DOMESTICATED AXIMALS AND PLANTS W'e know that several horselike forms developed in South America, but that all perished for one cause or another, one at least from soft teeth. It is exceedingly remarkable that while the North American horse progressed almost up to the modem Head Fore Foot Hind Foot Teeth. Protohippus !Mesohippiis Protorohippus H\Tacotherium (Eohippus) OneToe Splints of 2nd and 4th digits OneToe Splints of 2nd and 4th digits Three Toes Side toes not touching the ground Three Toes Side toes not touching the ground <6t Long- Crmvned Cement- covered a Three Toes I! Side toes M touching the ground; Splint of 5th digit Four Toes Four Toes Splint of 1st digit Three Toes Side toes touching the ground ThreeToes Splint of 5th digit Short- Crowned, without Cement Fig. 3S Comparative drawings of skulls, feet, and teeth of prehistoric horses, showing evolutionary- development. Reproduced, by permission, from "Origin and Histor\- of the Horse," bv H. F. Osborn tx-pe,^ he became extinct for some reason, and, so far as we know, before he was ever domesticated. What caused this extinction here and yet preserved the Asiatic form till man came upon the earth we cannot, with our present knowledge, even conjecture; though it is known that the 1 He had reached the size of the Shetland pony with three toes, only one of which rested firmly on the ground, digits II and IV being much like the "dew claws" (digits II and V) of pigs; digits I and V being represented by "splints" (digits numbered I-V beginning on the inside).. 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1910
