IO4 Rene* oftbe Fat*. [Book IX.. 



trofum and the fpinous procefs of the cuneiform bone. 

 This perforation only appears after the bones are 

 boiled ; for in a recent fubjed, its back part is covered 

 by a thin bony plate, which lies over the internal caT 

 rotid artery, and farther forward it is filled with a 

 cartilaginous ligament, under which the cartilagi- 

 nous part of the euftachian tube is placed : it was 

 by this pafiage that the ancients beheved the flimjr 

 matter was conveyed from the glandula pituitaria to 

 the fauces. The fecond aperture is a large difconti^ 

 nuation of the external fide of the orbit, left between 

 the orbitar procefles of the fphenoid bone, the os 

 maxillare, malae, and palati. The third common aper- 

 ture is formed between the bafe of this bone and the root 

 of the orbitar procefs of the palate bone of each fide. 



Under the fella turcica, within the fubftance of the 

 fphenoid bone, are two finufes, feparated by a bony 

 plate, which are lined with a membrane, and open, into 

 the noftrils. 



The fphenoid bone is joined to all the bones of the 

 cranium, and likewife to the ofifa maxillaria, ofla malp^ 

 rum, ofia palati, and vomer. 



The face is divided into the upper and under max- 

 illas or jaws. The upper jaw is the immoveable part 

 of the face, which confifts of fix bones on each fide, 

 and a thirteenth in the middle. The thirteen bones 

 are, two ofia nafi, two ofla unguis x two. ofla ma- 

 larum, two ofla maxillaria, two olTa palati, two ofla 

 fpongiofa inferiora, and the vomer. The ofla nafi 

 are placed at the upper part of the nofe ; the ofla un- 

 guis are the internal canthi of the orbits ; the ofla ma- 

 larum form the -prominence of the cheeks; the ofla 

 maxillaria form the fide of the nofe, with the whole 

 lower and fore part of the upper jaw, and the greateft 

 part of the roof of the mouth j the ofla palati are 



fituat^d 



