158 



TELEOSTOMES 



viva! (Palaeozoic-Mesozoic) have made it the most widely 

 known of fossil fishes. Of all extinct Ganoids there 



Fig. 162. Aspidorhynchus acutirostris, Agassiz. X f. (After ZlTTEL.) Jura, 

 Solenhofen. 



appears to attach to Palaeoniscus the greatest morphological 

 interest ; on the one hand, it seems closely akin to the 



^Fig. 163. Microdon wagneri, Thiolliere. X \. (From ZlTTEL, after THIOL- 

 LIERE.) Jura, Cerin. 



