

nasal cavities, and below this the transverse slit between the upper and lower 

 dental arcades. Above, the frontal eminences stand out more or less prominently, 

 and beneath these are the superciliary arches, joined to one another in the middle 

 by the glabella. On and above the glabella a trace of the frontal suture sometimes 

 persists; beneath it is the frontonasal suture, the mid-point of which is termed the 

 nasion. Behind and below the frontonasal suture the frontal articulates with the 

 frontal process of the maxilla and with the lacrimal. Arching transversely below 

 the superciliary arches is the upper part of the margin of the orbit, thin and proini- 



Supraorbital foramen 



Superior orbital fissure 



Lamina papyracea of ethmoid 



Lacrimal 



Inferior orbital fissure 



Zygomaticofacial 'foramen 



Infraorbital foramen 

 Nasal cavity 

 Inferior nasal concha 



Mental foramen 



Fio. 190. The skull from the front. 



nent in its lateral two-thirds, rounded in its medial third, and presenting, at the 

 junction of these two portions, the supraorbital notch or foramen for the supra- 

 orbital nerve and vessels. The supraorbital margin ends laterally in the zygomatic 

 process which articulates with the zygomatic bone, and from it the temporal line 

 extends upward and backward. Below the frontonasal suture is the bridge of the 

 nose, convex from side to side, concavo-convex from above downward, and formed 

 by the two nasal bones supported in the middle line by the perpendicular plate 

 of the ethmoid, and laterally by the frontal processes of the maxillse which are 

 prolonged upward between the nasal and lacrimal bones and form the lower and 



