216 



GENERAL REMARKS ON THE SKULL. 



FIG. 53. 



surface includes the bones of the face with a portion of the 

 frontal bone. 



In the superior part of this surface, on the median Iine 7 

 is seen the nasal tuberasity, on either side of which are the 

 superciliary ridges. Below these are the superior orbit- 

 ary margins, with the supra orbital holes at their inner 

 third ; for the transmission of the supra-orbital nerve and 



artery. Below 

 the nasal tu- 

 berosity is the 

 nasal spine of 

 the os frontis, 

 next are the 

 nasal bones 

 forming the 

 bridge of the 

 nose ; on either 

 side of which are 

 seen the nasal 

 processes of the 

 superior max- 

 ** illary bones, 

 the internal an- 

 gular processes 

 of the os fron- 

 tis, and still more externally the openings of the orbits. 

 Below the ossa nasi are the anterior nares, on the inferior 

 and central margin of which is the anterior nasal spine, 

 and below this again are the symphysis of the upper jaw 

 and the alveolar arch and processes. 



On either side of the anterior nares are the canine fossae 

 for giving origin to the levator anguli oris muscle ; above 

 this is the infra-orbital foramen, transmitting the infra- 



FIG. 53 represents the Bones of the Cranium and Face, with a few of the 

 sutures. 1 Frontal bone. 2 Parietal. 3 Temporal. 4 Sphenoidal. 5 Malar. 

 6 Superior 'maxillary. 7 Nasal. 8 Vertical plate or septum of ethmoid. 

 9 Lower jaw. 11 Lachrymal bone. 12 Os planum of ethmoid. 13 Super- 

 numerary bone. 14 Incisor teeth. Between 1 and 2, Coronal suture. Be- 

 tween 2 and 3, Squamous suture. 



