156 TELEOSTOMES 
which Lepidosteus has retained, while diverging widely on 
all sides in matters of shape, size, special dentition, and 
Ar .\ YY NY 
Si NN AS 
ANY PN AON 
SN 
Fig. 158. 2 pias (Rhabdolepis) macropterus (Giebel), Bronn. xX }. 
(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. — Zurynotus crenatus, Agassiz. x 4. (After TRAQUAIR.) Calcif- 
erous Limestone, Scotland. 
Thus Elonichthys (Fig. 158) was a form which had 
evolved a small size and narrow sculptured body plates ; 
