96 



COMPARATIVE ANATOMY 



F. Mammals. 



In Mammals there is a much closer connection between the 

 cranial and visceral regions of the skull than is the case in the 

 Vertebrates already described. In the fully-developed skull 

 both maxillary and palatopterygoid regions are united to 



Fig. 78 a. — Longitudikal Vertical Sections through the Skulls gi' — A, 

 Salamandra maculoia, B, Tesludo grmca, and C, Cornt.< roroiie, to show the 

 Relations between the Cranial and Visceral Portions. 



the cranium, though a facial and a cranial region can still be 

 distinguished. The higher we pass in the MammaHan series, 

 the more does the former come to lie below instead of in front of 

 the latter. In Man the facial skeleton is proportionately small 



