Reptilian Lower Jc 



583 



llie well-knoun process on tlie underside of the jaw is formed 

 entirely by the angular, as Seeley thought. 



The articular is a rather large bone fitting as a plug into 

 the cavity of the back of the jaw, and extending lather far 

 forward ; its outer face is largely covered by the surangulav 



Fio-. 5. 



At^t.' 5ur.Rn(; 



A. Left ramus of lo-n-er jaw of Pariasaurus, inner aspect. B. Right 

 amus of the same jaw, outer aspect. Teeth omitted. X \. 



and angular, and its inner side by the prearticular. The 

 articular face has two cotyli for the condyles of the quadrate. 

 The prearticular is a large bone covering the inner face 

 of the articular, overlapping the angular, and being itself 

 covered by the splenial and coronoid in front. 



There can be no doubt that the bones which in the pre- 

 ceding descriptions I have called by the same name are 



