298 



CAl'T. L). M. S. WATSON UX SEYMOURIA, 



Text-figui-e 15. 



Series of occipital views, reduced to the same width, of the skulls of Aiiomodonts 

 and of Cotylosaurs connected with that group. To show tlie low position, at 

 the back of the tuber basisphenoidalis, which the fenestra ovalis occupies in 

 these reptiles, its situation is indicated by the stapes. 



A. Seymouria bayloriensis.. 

 C. Varanosaurus acutirostris. 

 E. Diademodon broivni. 

 Gr. Uimetrodon sp. 



A, from text-fig. 2 ; B, from Watson. 1916. 

 in Munich; D, E, & H, from Watson, 1914; 

 G, from a skull figured by Case, modified by other material. 



A-E form an approximate moi-phological series ; P & G represent an aberrant side 

 line arising from C ; and H another distinct line also arising from a form near C. 



B. Captorhinus sp. 

 D. Arctops willisto7ii. 

 F. Deiopeus leptocephalus. 

 H. Mormosaurus seeleyi. 



C. Restored from the type-skeleton 

 F, modified from Watson, 1916; 



