116 True Fishes 



CUSK EEL, ARCTIC EELPOUT, TONGUEFISH, 

 AMERICAN EEL, AMERICAN CONGER EEL 



I. Pelvic fins present 

 Page 117, figs. A-C 



la. Pelvic fins attached at throat beneath eyes; each 

 fin consists of a single barbel split at the end into 

 two filaments 

 Page 117, fig. A 



See Margined Cusk Eel, p. 404. 



lb. Pelvic fins attached at throat far behind eyes, in 

 front of lower rear margin of operculum 

 Page 117, figs. B, C 



1. One eye on each side of head; body rounded 

 Page 117, fig. B 



See Reticulated Eelpout, p. 404. 



2. Both eyes on same side of head; body flattened 

 Page 117, fig. C 



See Tonguefish, p. 330. 



II. Pelvic fins absent 

 Page 117, figs. D, E 



Ila. Origin of dorsal fin far behind pectoral fin 

 Page 117, fig. D 



See American Eel, p. 300. 



lib. Origin of dorsal fin immediately behind rear edges 

 of pectoral fins 

 Page 117, fig. E 



See American Conger Eel, p. 301. 



