346 Case and Williston — Description of Reptilian Skulls. 



such a line passes anterior to the opening. The outlines of the 

 various bones can not be made out but it is evident that the 

 frontal was very short and took no part in the superior border 

 of the orbit. 



The lateral aspect of the skull. — Allowing for the crushed 

 condition of the anterior end, the lateral profile resembles that 

 of Diadectes. The orbits appear to be narrowed vertically, but 

 this is evidently due to crushing. On the right side there is 



Fig. 3. 



Fig. 3. Palate of Animasaurus carinatus 

 817, Mus. Yale University. 



Jase and Williston. x %. No. 



a large opening in the temporal region but this is of accidental 

 origin instead of a true temporal foramen, as is evidenced by the 

 sharp break of the edges and the lack of a corresponding open- 

 ing on the opposite side. 



The palatal aspect of the skull. — This shows the great differ- 

 ence between this genus and Diadectes. The alveolar edges of 

 the maxillaries are broadened as in Diadectes for the accom- 

 modation of the widened teeth, but the palatine process of the 

 maxillary is perhaps different: it appears to rise from the inner 

 edge of the alveolar surface instead of from the middle of the 

 inner side of the swollen portion of the bone and there is no deep 

 groove between it and the maxillary proper. The pterygoids 

 and prevomers are united in the median line throughout their 



