. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE HEAD. 85 If one of the branches of a goniometer be placed tangentially to the surface of the basilar process, and the other to the summit of the external occipital tuberosity, the basilo-occipital angle will be obtained. In the measurements we have taken of eight heads of Horses of diverse ages and breeds, this angle has varied from 70° to 91°. We except the head of a young English Stallion, the basilo-occipital angle of which was from *J2° to 100°. Measurement of the heads of Asses showed the angle to be 10
. The comparative anatomy of the domesticated animals. Horses; Veterinary anatomy. THE HEAD. 85 If one of the branches of a goniometer be placed tangentially to the surface of the basilar process, and the other to the summit of the external occipital tuberosity, the basilo-occipital angle will be obtained. In the measurements we have taken of eight heads of Horses of diverse ages and breeds, this angle has varied from 70° to 91°. We except the head of a young English Stallion, the basilo-occipital angle of which was from *J2° to 100°. Measurement of the heads of Asses showed the angle to be 103°. The average basilo-occipital angle was 85'8G° for the Horse, and 95° for the Ass. If, instead of taking the basilo-occipital angle, the goniometer be applied to the origin of the temporal crests and the superior outhne of the occipital Fig. 52. 20 e. 18 19 IS 12 17 ass's head (lateral face). 1, Occipital condyle; 2, styloid process of the occipital bone, with a very marked furrow on its external face; 3, e-Tternal occipital tuberosity, more developed than in the horse; 4, parietal crest; 5, external auditory hiatus; 6, zygomatic process of the temporal bone; 7, frontal bone; 8, orbit, with its external outline more angular thm in the hoise ; 9, lachrymal bone, with its tubercle partly implanted on the nasal bone; 10, zygomatic or malar bone; 11, nasal bone; 12, supermaxilla ; 13, zygomatic spine ; 14. infra-orbital foramen ; 15, premaxillary bone, with its inner border raised by a salient tubercle above the incisive canal; 16, incisor teeth ; 17, molar teeth; 18. inferior maxilla; 19, maxiliarv fissure; 20, maxillary condyle; 21, coronoid process ; 22, mental foramen ; 23, supra-orbital toramen, carried more to the middle of the orbital process than in the horse ; 24, basilar process of the occipital bone. foramen, the parieto-occipifal angle is obtained. In the Horse, this angle is between 81° and 104° : in the Ass between 77° and 87°—the average being 91-12°
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Keywords: ., bookauthorcha, bookcentury1900, bookdecade1900, booksubjecthorses
