112 True Fishes 



STURGEONS, SEA CATFISHES, PIGFISH 



I. Barbels on mouth 

 Page 113, figs. A-D 



la. Bony plates on various parts of the body 

 Page 113, figs. A, B 



1. Plates on back touching or overlapping 

 Page 113, fig. A 



See Common Sturgeon, p. 284. 



2. Plates on back separated from each other 

 Page 113, fig. B 



See Short-nosed Sturgeon, p. 285. 



lb. No bony plates on body; skin naked 

 Page 113, figs. C, D 



1. Lower jaw with a single barbel on each side of 

 head; barbels on upper jaw flat and much longer 

 than head 



Page 113, fig. C 



See Gaff-Topsail Catfish, p. 299. 



2. Lower jaw with two barbels on each side of 

 head; barbels on upper jaw round and shorter 

 than head 



Page 113, fig. D 



See Sea Catfish, p. 299. 



IF. No barbels on mouth 

 Page 113, fig. E 



See Pigfish, p. 371. 



