576 



Mr. D. M. S. Watson on some 



distinct sutures in several specimens, and apparently just 

 entering the symphysis. 



F\ff. 2. 



A. Left ramus of lower jaw of DjVj/wo^o??, inner aspect. B. Eighl ramus 

 ot the same jaw, outer aspect. C. Left articular region viewed from 

 above and behind. X J. 



For key to reference-letters see fig. L 



The snvangular is a thin plate of bone whose upper edge is 

 thickened so as to form a ridge on the outer surface, nearly 



