THE FACE 



333 



14 



13 " 13 

 RELATIONS OF THE SPHENOID AND PALATINE BONES. 



1, body of the sphenoid; 2, dorsuin sellre; 3, divided lesser wing; 4, optic foramen; 5, divided root of great 

 wing; 6, Vidian canal; 7, external pterygoid plate; 8, sphenoidal rostrum; 9, position of the orbital plate 

 of the ethmoid: 10, spheno-palatine foramen in spheno-maxillary fossa; 11, ethrnoidal process of palatine; 

 12, sphenoidal process; 13, rough surfaces for the maxillary; 14, maxillary process; 15. posterior palatine 

 canals leading down from the pterygo-rnaxillary fissure; 16, foramen rotundum. 



palatine foramina are thus brought near the posterior edge of the 

 bone. The superior-anterior part of the maxillary process, the eth- 

 moidal process, and the sphenoidal process do not spring directly from 

 the outer edge of the horizontal plate, as do these parts of the vertical 



FIG. 260. 



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 ; S, 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; 11, 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, rnaxillo-turbinal bone; 18, nncinate 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. 



