OSTEOLOGY AND ARTHROLOGY 



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which characterize them in the human species, and which 

 we clearly notice when we view them on one of their 

 lateral aspects : a concavity above, and a convexity below. 

 These curves are more or less accentuated— very strongly 

 marked in the bulldog, and scarcely at all in the greyhound. 

 Moreover, in the carnivora also the nasal bones are wider 



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Fig. 63. — Skull of the Horse : Left Lateral Aspect. 



1, Posterior surface of the occipital bone ; 2, external occipital pro- 

 tuberance ; 3, occipital condyle ; 4, jugular process ; 5, parietal bone ; 

 6, frontal bone ; 7, orbital cavity ; 8, zygomatic process of the temporal 

 bone; 9, external auditory canal; 10, mastoid process; 11, superior 

 maxillary bone or maxilla; 12, intermaxillary or incisor bone; 13, nasal 

 bone; 14, malar bone: 15. lachrymal bone; 16, inferior maxillary 

 bone or mandible ; 17, inferior maxillary fissure ; 18, condyle of the inferior 

 maxillary bone ; 19, coronoid process of the inferior maxillary bone ; 

 20, incisor teeth ; 21, canine teeth ; 22, molar teeth. 



below than above, and form, by their junction, a semi- 

 circular notch which limits, in its superior portion, the 

 anterior opening of the cavity of the nasal fossae. In the 

 horse they present an opposite arrangement with regard to 

 their dimensions in width ; broad above, each terminates 



