194 GANODONTA ONYCHODECTES CHAP, vni 



facial portion, and is thus more like that of Stylinodontidae 

 than that of Onychodectes. The dental formula is known, and is 

 complete save for the loss of one incisor above and below, and 

 one premolar above. The relationship of these Ganodonts to any 

 later forms is uncertain ; but their skeletal structure is as yet by 

 no means fully known. 



