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 imstructive 
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. 
