38 KANSAS UNIVERSITY gUARTEKI.V. 



Only a small portion of tlie articular is exposed on the external 

 side but on the internal it extends well forward. The cotylus is 

 very convex laterally and situated well up toward the coronoid 

 angle, while below and extending backward from it on the external 

 side is the prominent hook-like process fouml in this and other 

 genera of fishes. 



Measurements: 



Length of alveolar border from coronoid angle 52 mm. 



Depth at coronoid angle 10 '■ 



Length of bone from cotyloid cavity 56 " 



Number of teeth in i c m 4 



Laivrence. Kansas, /anuary ■; , \8gi^. 



