ISO 



THE SKELETON. 



lachrymal canal, a depression for the attachment of the Inferior Oblique muscle; 

 externally, the suture between the malar and superior maxillary bones ; near 



Fig. 132. Anterior Eegion of the Skull. 



TENOO OCUL 



Ant. Nasal Spine 

 Incisive fossa, 



its middle, the infraorbital groove; and posteriorly, the suture between th( 

 maxillary and palate bones. 



The Inner Wall is flattened, and formed from before backwards by the nasal 

 process of the superior maxillary, the lachrymal, os planum of the ethmoid, 

 and a small part of the body of the sphenoid. This surface presents the 

 lachrymal groove, and crest of the lachrymal bone, and the sutures connecting 

 the ethmoid with the lachrymal bone in front, and the sphenoid behind. 



The Outer Wall is formed in front by the orbital process of the malar bone; 

 behind, by the orbital plate of the sphenoid. On it are seen the orifices of one 

 or two malar canals, and the suture connecting the sphenoid and malar bones. 



Angles. The superior external angle is formed by the junction of the upper 

 and outer walls; it presents, from before backwards, the suture connecting the 

 frontal with the malar in front, and with the orbital plate of the sphenoid be- 

 hind ; quite posteriorly is the foramen lacerum anterius, or sphenoidal fissure, 

 which transmits the third, fourth, the ophthalmic division of the fifth and the 

 sixth nerves, and the ophthalmic vein. The superior internal angle is formed by 

 the junction of the upper and inner wall, and presents the suture connecting 

 the frontal bone with the lachrymal in front, and with the ethmoid behind. 

 This suture is perforated by two foramina, the anterior and posterior ethmoidal, 



