EXPLANATION OF PLATE 25. 



Preptoceras sinclairi, n. gen. and sp. Temporary mount of the type speci- 

 men, X.081. The orbital and nasal regions have been restored 

 from specimen No. 1001). The inferior premolars, the dorsal 

 vertebrae, excepting the fifth, and the caudal vertebrae have 

 been restored from allied forms. 



