THE FACE 



361 



angle forms the tuberosity. On the lower part of the inner border is 

 a rough area for the tuberosity of the palatine bone ; above which is 

 a groove forming a part of the posterior palatine canal. At the end 

 of the inner border of the orbital surface is an area for articulation 

 with the ethmoidal process of the palatine bone (Fig. 281). 



The high external, or facial, surface exhibits a deep canine fossa 

 under the infraorbital foramen. The preuiaxillary margin of the 

 nasal aperture presents a well-marked median nasal spine. 



The nasal surface of the body (Fig. 280) is much larger than the 

 corresponding surface of the cat's maxillary, and the short ridge for 



LEFT SIDE OF FACE, OUTER WALLS OF THE ORBIT AND ANTRUM REMOVED. 



1, frontal orbital plate; 2, frontal sinus; 3, lachrymal bone; 4, ethmoid bone; 5, 6, ethmoidal foramina; 

 7, sphenoid bone ; 8, optic foramen ; 9, palatine bone, ethmoidal process ; 10, spheno-palatine foramen in inner 

 wall of spheno-maxillary fossa; 11, foramen rotundum ; 12, Vidian canal; 13, pharyngeal canal; 14, termination 

 of the pterygo-maxillary fissure in the posterior palatine canal ; 15, posterior dental canal ; 16, inner wall of 

 the antrum formed by the maxilla ; 17, maxillo-turbinal bone ; 18, uncinate process of the ethmoid ; 19, palatine 

 bone; 20, descending process of the lachrymal behind which is the opening of the antrum into the nasal cavity; 

 21, lachrymal fossa. 



the maxillo-turbinal is high above the origin of the palatine process. 

 The posterior half of the surface is wanting at the point where the 

 antrum opens into the nasal cavity. 



The inferior, or alveolar, border is so prominent that it has been 

 called the alveolar process. In it are implanted eight teeth, namely, 

 two incisors, a single canine, two premolars, and three molars. 



The nasal process is small ; its nasal surface presents a superior 

 turbinated crest for articulation with the middle turbinated bone of 



