HEAD. 



71 



sure. The anterior border is articular ; the posterior 

 has the alveolar cavities, the alveolar tuberosity and 

 the inter-dental space. The superior extremity forms 

 the maxillary hiatus, with three openings, the nasal 

 foramen, super-maxillo dental canal, and palatine canal. 

 The inferior extremity has an alveolus for the tusk. 

 Development : one nucleus of ossification. 



Pre-maxillaky, or small maxillary. — Division : 

 One body and two processes. Body has three faces — 

 the external, or labial, the internal with a notch to 

 form the incisive canal, and the posterior or buccal. 

 Of the three borders, two are internal, the external 

 has three alveoli for the incisive teeth and one notch 

 for the tusk, between the\ the interdental space. 

 Processes : the external is the longest and has two 

 faces, two borders and an apex ; the internal forms 

 the incisive cleft or opening. Development : one 

 nucleus of ossification. 



Palate. — Division : Two faces, two borders and 

 two extremities. The external face has three regions, 

 one superior or orbital with the staphyloid groove, one 

 inferior, forming the roof of the palate, and one mid- 

 dle, articular. The internal face belongs to the nasal 

 cavities. The anterior border has the nasal foramen, 

 the posterior the palatine crest. The superior extremi- 

 ty articulates with the sphenoid, the inferior with that 



