74 



COPE 



Fig. 25.—CrocodUiis acer Cope ; skull, one-third natural size. From the Eocene 

 of Utah. Original. 



The Squamata is an extended group which exists under 

 the following three subordinal forms : 



Quadrate supported usually by exoccipital ; 

 paroccipital bone on end of exoccipi- 

 tal peduncle ; frontal and parietal 

 little decurved ; brain-case open in 

 front ; roots of teeth dentinal ; Lacertilia. 



