OSTEOLOGY AND ARTHROLOGY 



117 



which is indined downwards and directed backwards; the 

 other, anterior, is also incHned downwards, but with a forward 

 obhquity. At the union of these planes the bone forms an 

 elbow, on either side of which are found the osseous pro- 

 cesses on which the horns are mounted. 



Elk.Cuy£\ 



El 17 



Fig. 61. — Skull of the Pig : Left Lateral Aspect. 



I, Occipital bone ; 2, condyle of the occipital ; 3, jugular process 

 4, parietal bone ; 5, parietal crests ; 6, frontal bone ; 7, orbital process ; 

 8, orbital cavity ; q, external auditory canal ; 10, zygomatic process ; 

 II, superior maxillary bone; 12, intermaxillary or incisor bone; 13, 

 nasal bone ; 14, anterior orifice of the cavity of the nasal fossae ; 15, 

 malar bone; 16, lachrymal bone; 17, inferior maxillary bone; 18, con- 

 dyle of the inferior maxillary bone ; 19, incisor teeth ; 20, canine teeth ; 

 21, molar teeth. 



In the bear, the anterior margin of the frontal bone is 

 prolonged by two small tongues of bone, which, descending 

 on the lateral borders of the nasal bones, articulate with the 

 superior half of the latter. 



The temporal bone is, as in man, furnished with a squamous 



