56 



is pretty goo;l but soft. Scales rather large. Tail with 24 rays 

 and two equal rounded lobes. Iris giit brown, eyes small. Pcc- 

 . toral fins with 16 rays. Dorsal fins shallow and even beginning 

 just before the abdominal fins, and ending at the base oftlie a- 

 nal fin. 



56th Species. Black Buffalo-fish. Catostomus rtiger. 

 Catostomc noir. 



Entirely black, lateral line straight. 



I have not seen this fish. Mr. Audubon describes it as a pe- 

 culiar species, found in the Mississippi and the lower part of the 

 Ohio, being entirely similar to the common Buffalo-fish, bdt 

 larger, weighing sometimes upwards of fifty pounds, and living 

 in separate shoals. 



3d Subgenus. Carpiodf.s. 



Body oblong, somewhat compressed; head compressed, nine 

 abdominal rays, dorsal fin commonly elongatc,taiI equally forked. 



The C. cyfirinus and C. sciosus, of Lesueur, belong to this 

 Subgenus. 



57th Species. Olive Carp Sucker. Catostomus carfiio. 

 Catostome carpe. 



Diameter one fourth of the length: olivaceous above, pale be- 

 neath, chin white, abdomen bluish: lateral line straight, dorsal, 

 fin somewhat falcated villi 36 rays, anal trapezoidal with 10 

 rays; head sloping, snout rounded. 



Seen at the falls of the Ohio, commonly called Carp. Length 

 from one to two feet. Eyes very small and black, fins oliva- 

 ceous brown, the pectorals olivaceous, trapezoidal short and 

 with 16 rays. Tail with 24. Dorsal fin beginning before the 

 abdominal and reaching the end of the anal fin. Not so good t© 

 eat as the Buffalo-fish. 



58lh Species. Sailing Sucker. Catostomus ve/i/er. Catos- 

 tomc volant. 



Diameter less than one fourth of the length: body elliptical, 

 silvery with golden shades, lateral line flexuose, dorsal fin very 

 broad falcated with 25 rays, the first ones very long, anal fin tra- 

 ptjzoidal lunulate with 10 rays: head sloping, snout rounded. 



Catostomus anonymous Lesueur in Journ. Ac. Nat. Sc. of 

 Philadelphia, Vol. 1 , page 1 10. 



