OSTEOLOGY. 21 



Articulations, 7. 



Superior maxillary, sphenoid, inferior turbinated, vomer, ethmoid, 

 frontal and opposite. 



ZYGOMATIC OR MALAR. 



The zygomas form part of the side of the face, wedged in between 

 the superior maxilla, frontal and zygomatic process of the tem- 

 poral. It has a base, united with the superior maxillary, a sum- 

 mit, united with the zygomatic process, an external face, internal 

 face, anterior and posterior border. 



The external face has a smooth portion forming part of the 

 orbital margin and a smooth convex facial portion. 



The internal face 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 frontal, nasal, 

 malar and superior maxilla. It shows external and internal 

 surfaces, 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 lachrymal duct and fossa. 



An inferior or facial convex portion. 



The internal surface forms part of the maxillary and frontal 

 sinuses. 



Articulations, 4. 



Frontal, nasal, superior ma-xilla and malar. 



NASAL. 



The nasal bones are two in number, articulating with each 

 other in the median line, 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 prolongation. 



