194 GANODONTA—OW YCHODECTES CHAP. VIII 
facial portion, and is thus more hke 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. 
