AMPHITHERIUM. 57 



anterior marginal ridge, which are indicated by the im- 

 pressed matrix in the before described jaws of the Amphi- 

 therium : the entire and prominent convex condyle is now 

 seen to rise higher above the level of the molar teeth than 

 was indicated by its incomplete remains in the former 

 specimens : and the outer surface of the present instructive 

 fossil demonstrates several small anterior foramina or out- 

 lets of the dental canal ; one beneath the third premolar, 

 and others nearer the end of the jaw, as in that of the 

 Myrmecobius. Such foramina are still more mumerous, and 

 extend further back in the jaws of most Saurians. 



