368 ON TRIASSIC STEGOCEPHALIANS. 



parasphenoid, the prevomers, and the pterygoids, innumerable 

 very minute teeth. In this it agrees with the large South 

 African form Rhinesuchus. 



The mandible, so far as can be ,seen in the specimens, agrees 

 closely with that of Trimerorhachis. On the lower and outer 

 ■sides can be seen a small splenial in front, with behind it a rather 

 larger preangular, and behind this Jatter a large angular. The 

 preangular has on its inner side relations to the preaiticular 

 and to what is probably the intercoronoid similar to those of 

 Trimerorhachis. The structure of the jaw is best seen in the 

 British Museum specimen R 506. 



