298 FISHES. 



7. ICHTHYOBUS, Rafinesque. BUFFALO FISHES. 

 < SclerognathuS) Val. 



1. /. bubalus, (Raf.) Ag. BROWN BUFFALO FISH. 

 Depth 3J in length; head the same; eye small, 6^ in 

 head; depth of head five -sixths its length; opercle very 

 wide, forming nearly half the length of head convex 

 and furrowed; scales very large; dull brownish olive, 

 not silvery; D. 27; A. 10; lat. 1. 40; length (of specimen) 

 27 inches; weight 15 fbs. Mississippi Valley (described 

 from specimen from Wabash R.) 



8. BUBALICHTHYS, Agassiz. BUFFALO SUCKEKS. 



1. B. niger, (Raf.) Agassiz. BUFFALO FISH. Depth 

 = length of head, 3f in body; eye 4 to 6 in head; nape 

 prominent, convex; length of opercle half its height; 

 D. 30 to 35; A. 8. Mississippi Valley; known from the 

 preceding by its more arched back, inferior mouth and 

 probably greater size. Several other species of Ichthy- 

 obus and Bubalichthys have been mentioned but not 

 recognizably described. 



9. CYCLEPTUS, Rafinesque. SUCKERELS. 

 = RJiytidostomus, Ekeckel. 



1. C. elongatus, (LeSueur) Ag. BLACK HORSE. 

 GOURD -SEED SUCKER. LONG BUFFALO. MISSOURI 

 SUCKER. Body fusiform, not greatly compressed ; 

 mouth very small; depth 4 to 5 in length; lobes of 

 dorsal and caudal much attenuated; jet black above, 

 sides black with a coppery lustre; snout minutely 

 tuberculate in spring; D. 35; length 2 to 3 feet; weight 

 2 to 15 ibs. Mississippi Valley, in large streams. A 

 singular species, quite unlike any other. 



