THE ZYGOMATIC BONE 



165 



The orbital process is a thick, strong plate, projecting backward and medialward 

 from the orbital margin. Its antero-medial surface forms, by its junction with 

 the orbital surface of the maxilla and with the great wing of the sphenoid, part 

 of the floor and lateral wall of the orbit. On it are seen the orifices of two canals, 



Parietal 



FIG. 164 Left zygomatic bone in situ. 



the zygomaticob'rbital foramina; one of these canals opens into the temporal fossa, 

 the other on the malar surface of the bone; the former transmits the zygomati co- 

 temporal, the latter the zygomaticofacial nerve. Its postero-lateral surface, smooth 

 nnd convex, forms parts of the temporal and infratemporal fossae. Its anterior 

 margin, smooth and rounded, is part of the circumference of the orbit. Its superior 



With Frontal 



I'ristles passed 



through 



zygomatico- 



orbital foramina 



FIG. 165. Left zygomatic bone. Malar surface. 



FIG. 166. Left zygomatic bone. Temporal surface. 





margin, rough, and directed horizontally, articulates with the frontal bone behind 

 the zygomatic process. Its posterior margin is serrated for articulation, with the 

 great wing of the sphenoid and the orbital surface of the maxilla. At the angle 

 of junction of the sphenoidal and maxillary portions, a short, concave, non-articular 



