. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE HEAD. 85 If one of the branches of a goniometer be placed tangentiallj 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 92° to 100°. Measurement of the heads of Asses showed the angle to be 103°. The a
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE HEAD. 85 If one of the branches of a goniometer be placed tangentiallj 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 92° to 100°. Measurement of the heads of Asses showed the angle to be 103°. The average basilo-occipital angle was 85*36° 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 outline of the occipital Fig. ass's head (lateral face). , Occipital condyle; 2, styloid process of the occipital bone, with a very marked furrow on its external face; 3, external 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 than in the horse; 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, maxillary fissure; 20, maxillary condyle; 21, coronoid process ; 22, mental foramen ; 23, supra-orbital foramen, carried more to the middle of the orbital process than in the horse ; 24, basilar process of the occipital bone. In the Horse, this angle is and S7°—the average being foramen, the parieio-occipifal angle is obtained between 81° and 104° ; in the Ass between 7' 91-12° for the Horse, and 84° for the Ass
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