108 



SPECIAL ANATOMY OF THE SKELETON 



Processes. The frontal process (processus frontosphenoidalis) is thick and 

 serrated, and articulates with the external angular process of the frontal bone. To 

 its orbital margin is attached the external tarsal ligament. 



Frontal process Ext. angular process 



Zygoma- 

 tic proc. 



FIG. 75. Right malar bone in situ. 



The orbital process is a thick and strong plate, which projects backward from the 

 orbital margin of the bone. Its supero-internal surface (fades orbitalis}, smooth 

 and concave, forms, by its junction with the orbital surface of the maxilla and with 

 the greater wing of the sphenoid, part of the floor and outer wall of the orbit. Its 

 temporal surface, smooth and concave, forms part of the zygomatic and temporal 



Bristles passed 



through temporo- 



malar canals. 



With frontal. 



FIG. 76. Left malar bone. Outer surface. 



FIG. 77. Left malar bone. Inner surface. 



fossae. Its anterior margin is smooth and rounded, forming part of the circum- 

 ference of the orbit. Its superior margin, rough and directed horizontally, artic- 

 ulates with the frontal bone behind the external angular process. Its posterior 

 margin is rough and serrated for articulation with the sphenoid; internally it 

 is also serrated for articulation with the orbital surface of the maxilla. At the 



