THE FACE 



367 



FIG. 285. 



RIGHT MALAR BONE, OUTER 

 VIEW. 



1, external or facial surface; 2, 

 lalar foramen ; 3, frontal process ; 



fhp mflvilliw irtlVnlflr 4 > 5, orbital border; 6, maxillary 

 L1 7 border; 7, zygomatic process; 8, 



border ; 9, zygomatic 



The smooth convex external, or facial, surface is bounded by the 

 orbital, maxillary, zygomatic, and temporal borders, and is prolonged 

 on the maxillary, zygomatic, and postorbital, or 

 frontal, processes. 



In some specimens the external surface ex- 

 hibits in front of the middle a marked swelling, 

 the malar tuberosity ; and the temporal margin 

 of the frontal process may be enlarged at one 

 point, to form a marginal process for the 

 stronger attachment of the temporal fascia. 



The internal surface of the malar is 

 divided into two parts by a strong plate, 



which begins at the apex of the frontal pro- malarforamen;3) frontal process . 

 cess, ends below a 



surface, and is directed inward. This plate is 

 named the orbital process, and corresponds 



to the crest on the inner surface of the postorbital process of the 

 cat's malar. Its upper margin is continuous with the end of the 

 frontal process, and with it joins the external angular process of the 

 frontal bone ; its inner margin joins the malar crest of the large wing 

 of the sphenoid, except at a small point below, where it forms the 

 rounded anterior border of the spheno-maxillary fissure. 



In the cat, the orbital and temporal parts of the inner surface lie 



almost in the same plane ; in 

 man, the orbital surface faces 

 forward and inward and forms 

 the anterior part of the side wall 

 of the orbital cavity, while the 

 temporal part is deeply concave, 

 faces inward and backward, and 

 in part forms the anterior and 

 external walls of the temporal 

 and zygomatic fossae. 



FIG. 286. 



POSITION OF LEFT NASAL BONE. FRONT VIEW. 



THE NASAL BONES. 



General Description. 



The Nasals are two long narrow bones which lie side by side at the 

 anterior end of the skull just above the nasal aperture (Fig. 286). 



