300 FISHES. 



ft Adipose fin long, keel-like, continuous with the rounded 

 caudal ; spines well developed. . . NOTDRUS, 4. 

 ** Eyes concealed beneath the skin ; blind cave fishes. 



GRONIAS, 5. 



/. ICTALURUS, Rafinesque. CHANNEL CATS. 

 = SynechoglaniS) Gill. 



1. /. punctatuSf (Raf.) Jordan. CHANNEL CAT. BLUE 

 \{_ CAT. WHITE CAT. Depth 5 in length; head 4, longer 



than broad; upper jaw longest; clear olivaceous, silvery 

 below and on sides; young punctate with black; barbel 

 longer than head; D. I, 6; A. 26; P. I, 8. Mississippi 

 Valley, abundant. [I. ccerulescens, (Raf.) Gill.] 



2. I. nigricans, (LeS.) Jordan. GREAT LAKE CAT 

 FISH. Olive brown, sides ashy with large faint black 

 blotches; back nearly black; D. I, 6; P. I, 9; A. 26; 

 length 2 to 4 feet. Great Lakes, abundant; reaches a 

 large size. (This species proves to be an Amiurus; 

 see Addenda.) 



3. I. furcatus, (LeS.) Gill. GREAT FORK-TAILED CAT. 

 Olivaceous, silvery; back blackish; maxillary barbel 

 shorter than head; D. I, 7; P. I, 10; A. 33; very large. 

 Mississippi Valley. 



4. /. furcifer, (C. & V.) Gill. FORK -TAILED CAT. 

 Olivaceous; barbels longer than head; D. I, 6; P. I, 9; 

 A. 27. Mississippi Valley; a doubtful species. 



5. /. gracilis, (Hough) Gill. NORTHERN SILVERY CAT. 

 D. I, 5; A. 23; barbels as long as head. N. N. Y. 



2. AMIURUS, Rafinesque. HORNED POUTS. 



< Pimelodus, early authors. 

 * Caudal fin deeply forked. 



1. A. lynx, (Girard) Gill. POTOMAC CAT. Width of 

 head 4^- in length; eye large, 3 to 5 in interorbital space; 



