. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE ANTERIOB LIMBS. 119 Fig. 78. is wilier and less elongated than tlie internal. They articulate with each other and with the first phalanx, by small diarthrodial facets. The second phalanx is hollowed internally by a small medullary cavity. The ungual phalanx, as a whole, resembles one of tlie lateral moieties of the os pedis of Solipeds. This phalanx has no complementary fibro-cartilage, basilar process, or retrossal eminence, nor yet a cavity for insertion on the sides of the pyramidal eminence. The semiluna
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE ANTERIOB LIMBS. 119 Fig. 78. is wilier and less elongated than tlie internal. They articulate with each other and with the first phalanx, by small diarthrodial facets. The second phalanx is hollowed internally by a small medullary cavity. The ungual phalanx, as a whole, resembles one of tlie lateral moieties of the os pedis of Solipeds. This phalanx has no complementary fibro-cartilage, basilar process, or retrossal eminence, nor yet a cavity for insertion on the sides of the pyramidal eminence. The semilunar crest is replaced by an obtuse, thick, and rugged ridge, which occupies quite the posterior limit of the inferior face of the bone. Three large canals penetrate the third phalanx—two to the base of the pyramidal eminence, and one towards tho origin of the preplantar fissure. They form, in the interior of the bone, a vast sinus, giving rise to several vascular canals which open on the surface. There is only one foramen at the base of the pyramiilal eminence in the smaller Buminants. B. Camel,—In this animal, there are in each digit only three phalanges and two large sesamoids. The direction and form of these phalanges differ notably from what is seen in Ruminants. The first phalanx is long, very oblique, constricted in the middle, and very thick at both ends. On the superior articulating surface is a single glenoid cavity, divided posteriorly by a median groove. The inferior surface is prolonged on tlie posterior face of the bone, wliich is converted into a kind of pulh y. The second phalanx is nearly horizontal, and much flattened above and below. The ungual phalanx is somewhat like an irregular trifacial pyramid with a blunt summit; neurits base, on its upper face, it has a roughened tubercle. C. Pig.—The Pig has four complete digits articu- lating from the mefacarpals ; the thumb is absent. The index and auricularis—or fourth and fifth digits—are short, and do not
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Keywords: ., bookauthorcha, bookcentury1900, bookdecade1900, booksubjecthorses
