Fauna and Stratigraphy of the Stormberg Series. 



359 



great and, secondly, there seems to be sufficient evidence in the nasal 

 region itself to prove that the nostrils were separate and somewhat 

 lateral. The whole structure of the remaining portion of the snout 

 seems to point to this conclusion. On the righthand side the im- 



Fig. 17. Notochampsa istedana, Br. 

 Top view of skull. X 1. 



pression of the bone is excavated as if it were the posterior border 

 of the nostril. This portion of the snout seen in profile is distinctly 

 raised, whereas the remainder of the snout is slightly concave along 

 the median line, and between the nostril and the centre line is a 

 shallow concavity. If this reading of the structure is correct, then 



