Species of Saurocephalus. 



483 



forms ; but in the specimen figured it is hidden by the over- 

 lying ceratohyal, which is not shown in the figure. At the 

 anterior end of the mesial face of the dentary there is found 

 a broad surface, rough with processes and pits, an indication 

 that the two dentaries were strongly bound together. The 



Ffo. 2. 



$M^>M^<*£\ 



extreme anterior end of each dentary is occupied by a surface 

 to which was evidently attached such a predentary as 

 Stewart has described as belonging to several related species. 

 A groove and a row of foramina are present on the median 

 face of the dentary. 



Length of alveolar border 



Length of mandible from cotylus 

 Depth of mandible at last tooth . . 

 Deptli of mandible at symphysis 



in Mini. 



112 



130 



56 



34 



Fig. 3 represents, five eighths the natural size, the pterygo- 



Fig. 4. 



palatine arch seen from within. A triangular piece is 

 missing from the anterior end, and the lower end of the 



