CYNODONT REPTILES GOMPHOGNA.THUS AND CYNOGNATHUS. 201 



and 7) : it is probable that the mutual limits of these bones are 

 in both cases the same. The suture between the articular and 

 prearticnlar is obliterated in both cases. 



As to the second point. The coronoid process of the left 

 dentary in Gomphognaihus is only partially preserved (text-fig. 4), 



Text-figure 5. 



Cynognathus crate ronot it s t right ramus of lower jaw, external view. X J. 

 Shaded part covered with matrix. 



ang.; angular. 

 art. ; articular. 

 dent. ; dentary. 

 sang. ; supra-angular. 



Text-figure 6. 



ang.\~ ""^angn. 

 an aim 



Cynognathus crateronahis : right ramus of lower jaw, internal view. X }. 

 Shaded part covered with matrix. 



ang. ; angular. dent. ; dentary, 



ang.hn.; angular lamina. prart. ; pre-articular. 



ang.n.; angular notch. ■ sang.; surangular. 



art. ; articular. spl. : splenial. 



cr. ; coronoid. 



whilst the right dentary shows this process in its entirety, and 

 although the upper part of it is covered with matrix, its upper 

 edge is clearly visible from above (com p. text-fig. 2). As the hind 



