5 6 



TELEOSTOMES 



which Lepidosteus has retained, while diverging widely on 

 all sides in matters of shape, size, special dentition, and 



Fig. 158. Elonichthys (Rhabdolepis) macropterus (Giebel), Bronn. x J. 

 (After L. AGASSIZ.) Lower Permian, Rhenish Prussia. 



features of the body armouring, characters, apparently, 

 of minor morphological importance. But a few of the char- 

 acteristic types of the early Ganoids can be noted in the 

 present connection. Some of the more important have 

 been figured in Figs. 158-164. 



Fig. 159. Eitrynotus crenatus, Agassiz. x |. (After TRAQUAIR.) Calcif- 

 erous Limestone, Scotland. 



Thus ElonichtJiys (Fig. 158) was a form which had 

 evolved a small size and narrow sculptured body plates ; 



