SKULLS OF CYNODONT REPTILES. 



907 



in Nythosaurus. As the back of the skull is reliitively narrower 

 than in Cynognathtis, the posterior part of the squamosal difiers 

 considerably in contoui-. 



Text-fig. 174. 



Pm> 



Upper view of tlie skull of TriracJiodon Tcannemeyeri. 

 From the same specimens as tig. 173. 



The quadrate, so far as can be seen, is small but not unlike the 

 better known types. 



The stapes is a very slender straight bone about the thickness 



