352 FISHES. 



unknown. Binichihys: a gigantic fish from the Devonian 

 of North America (estimated at from 15 to 18 feet in length), 





T- 



Fig. 136.— Dorsal surface of Pterichtliys, after Pander, d, Dorsal fin ; t', 

 pectoral member ; 2-10, head-bucklers ; 11-13, dorsal bucklers. 



with the dermal covering very similar to that of Cocco- 



