OSTEOLOGY. 2 1 



Articulations, 7. 



Supenor i7iaxillary, sphenoid, inferior- turbifiated, vomer, eth- 

 moid, fro7ifaI and opposite. 



ZYGOMATIC OR MALAR. 



The zygomas form part of the side of the face, wedged in be- 

 tween the superior maxilla, frontal and zygomatic process of the 

 temporal. It has a base, united with the superior maxillary, a 

 suuunit, united with the zygomatic process, an external face, in- 

 ternal face, anterior 2,Xidi posterior border. 



The external face has a smooth portion forming part of the 

 orbital margin and a smooth convex facial portion. 



The inte7-nalface shows an articulation for the superior maxilla. 



The anterior border joins the lachrymal, the posterior or mas- 

 seteric forms a ridge continuous with that of the superior maxilla. 



Articulations, 3. 



Superior maxillary, temporal and lachrymal. 



LACHRYMAL. 



The lachrymal is a quadrilateral bone forming parts of the face 

 and orbit, bent on itself and wedged between the/r^///^/, nasal, 

 malar and supei ior maxilla. It shows external -axiA internal sur- 

 faces, and a circumference articulating with the surrounding bones. 



The external surface shows — 



A superior or orbital portion, concave, and forming the upper 

 extremity of the lachry^nal duct ^ind fossa. 



An inferior or facial convex portion. 



1 he internal surface forms part of the maxillary and frontal 

 sinuses. 



Articulations, 4. 



Frontal, nasal, superior maxilla and malar. 



NASAL. 



The nasal bones are two in number, articulating with each 

 other in the median Hne, and forming the bony framework of the 

 nose. 



They are triangular in shape, with their base upward uniting 

 with the frontal, the apex downward and pointed, forming the 

 nasal t>rolons'atioft 



