46 



COPE 



The Rachitomi possesses but one family, the Eryopidse, 

 which often reached a large size (Fig. 14). These are con- 

 fined to the Coal Measures. If the Labyrinthodontidse be- 

 long to this order they range also to the Trias inclusive, in 

 both continents. 



The Embolomeri includes one family, the Cricotidse, 



N 



\ 



Fig. U.— Eryops megacephalus Cope ; skull, from above, one-fourth natural size. 

 From Permian bed of Texas. From Cope. 



