424 Dr. C. W. Andrews on some new Pleslosauria 



is known atid a fairly complete diagnosis is possible. This 

 genus, which may be called Simolestes, is defined as follows : — 



SiMOLESTES, gen. nov. 



Pliosaurs in which the head is short and broad (fig. 7), the 

 snout not being elongated as in Pliosaurus and Peioneustes. 

 Mandible with deep massive rami meeting in a short 



Fie:. 4. 



Anterior end of upper and lower jaws of Simolestes vorax. (Type 

 specimen R. 3319.) \ nat. size. A, from below ; B, from left side. 



symphysis, the ventral surface of which makes a well-marked 

 angle with the direction of the lower border of the rami 

 (fio-. 4) ; the postarticular (angular) region is relatively small. 



