nSHES, 



281 



suborbital bones forming a chain which extends from the anterior 

 frontal to the posterior one, and completing the frame of the orbit 

 which has been abandoned as it were by both the maxillary and jugal 

 bones, and assuming the appearance of the jugal, or representing (if 

 the expression be better liked) the portion of this bone, and that of the 

 maxillary, which, in the mammalia, were beneath the orbit ; and the 



The two jugals or bone The posterior 

 of the pommette. suborbitars 



Inferior Ring. 



The two internal pt^ 

 rygoid apophyses. 



The pt^rygoi' 

 cleans. 



Remarks. 



Here the author aban 

 dons his doctrine of 

 the identity of the 

 number of pieces 

 which one bone must 

 be represented but by 

 onebone. The posterior 

 suborbitars are some 

 times very numerous. 



FIFTH VERTEBRA. 



Superior Ring. 

 The two parietals. 

 The two temporals. 



The hyposphenal or 

 posterior body of the 

 sphenoid. 



Inferior Ring. 

 The two great tube 

 rosities of the circle of 

 the tympanum. 



The parietals 

 The posterior 

 frontals. 



The posterior 

 sphenoid. 



The temporals 



The two Cotylcaux. 



The tympanal 

 and jugal, call- 

 ed by M. Geof- 

 frey, epicoty- 

 leal and hypo- 

 cotyleal. 



In his first essays, M. 

 Geoffroy spoke of a 

 symplectic -which he 

 called uro-serrial, in 

 other words, the infe- 

 rior, thin portion of 

 the frame of the tym- 

 panum. 



Here, again, the au- 

 thor abandons hisiden- 

 tity of the number in 

 the representatives of 

 the bones, because, for 

 the two bones he has 

 made only one. I 

 ought to observe, also, 

 that the cotyleal, or, 

 other words, the 

 case never, as it ap- 

 pears to me, can be 

 considered as a differ- 

 ent bone from the 

 tympanum, of which 

 it is only the contiaua- 

 tion. 



Here the two rings are 

 also disjointed, the one 

 from the other; the 

 posterior sphenoid has 

 connexion either 

 with the parietals and 

 the posterior frontals, 

 or with the temporals, 

 the chest, and the 

 jugal. 



