THE SKULL 



291 



The remaining reptiles 

 side, but whereas in some 

 temporal fossa, in others 

 fossa of Diapsida. 



have a single temporal fossa on each 

 this would seem to be the superior 

 it represents the inferior temporal 



Forms with a single inferior temporal fossa on each side 

 are called Synapsida, including the Theromorph reptiles and 

 the mammals. The inferior temporal fossa is primitively 

 bounded above by the post-orbital and squamosal bones. In 



