MAN. 



325 



The orbits are for \vardly directed and almost completely shut 

 oft' by bone from the temporal fossae. 



The superior maxillary bones ( = premaxillse + maxillae) which 

 support the upper jaw, are of great importance in the formation 

 of the face. Above, they partly wall in the olfactory capsules, 

 and together with the malars, frontal, and lachrymals, form the 

 margins of the orbits. Below, they present a horseshoe-shaped 



ridge excavated by the 

 sockets of the upper teeth, 

 and large palatine pro- 

 cesses,"' making up the 

 greater part of the hard 

 palate, which is relatively 

 much larger than in the 

 rabbit. The hard palate 



Fig. 97. MAX. Dorsal view of Sacrum 

 (from Macalister). 



Fig. 98. MAN. Dorsal 

 view of Coccyx (from 

 MacaUstf.r). 



is completed by palatal bones, and immediately behind it on each 

 side there is a pterygoid plate projecting downwards from the 

 greater wing of the sphenoid ( = alisphenoid) and divided into 

 an external pterygoid plate, and a narrow internal pterygoid 

 plate ( = pterygoid bone) produced into a hook-like process. 



The most noteworthy features in the inferior maxilla or bone 

 of the lower jaw ( = mandible) are the very complete fusion of 

 its two rami and the presence of a chin-projection or mental 

 prominence at the symphysis. The inferior maxilla also presents, 

 in the upper side of its horizontal part, a horseshoe-shaped ridge 

 excavated by the sockets of the lower teeth. 



The vertebral column is both strong and flexible. To support 

 the vertically-placed body great strength is necessary, and in 



* If these processes fail to unite in the middle line cleft palate results. 



