CATOSTOMID^. 3 1 



According to Jordan, the Red-mouthed Buffalo Fish abounds 

 in the Ohio river and its larger tributaries, and Henshall reports 

 it ' ' very common in Ohio river. ' ' Not reported for any other 

 locality. 



Ictiobus urus (Agassiz). Mongrel Buffalo ; Razor-backed Buffalo. 



Head very stout, strongly transversely convex, thicker, larger and less . 

 pointed than in /. bubalus, about 4 in length. Eye about equal to snout, 5^ 

 in head, much smaller than in /. bubalus. Mouth large, considerably 

 oblique, approaching that of /. cyprinella. Body much less elevated and 

 compressed than in /. bubalus, the back not at all carinated ; 3 to 3^ in 

 length. D. 30 ; A. 10 ; scales 8-41-7. Longest ray of dorsal scarcely yi the 

 length of base of fin ; anal rounded. Colors very dark, fins all black. " Not . 

 always separable from /. cyprinella, and perhaps not really different." 



Ohio river at Cincinnati, Henshall, 1889. Not mentioned by 

 any other collector. 



Ictiobus bubalus (Rafinesque). Buffalo Fish ; Small-mouthed 

 Buffalo ; Razor-back ; Sucker-mouthed Buffalo. 



Head moderate, triangular in outline when viewed from the side, 4 in ■ 

 length, mouth quite small. Body considerably elevated and compressed 

 above ; the dorsal region sub-carinate, the belly thicker ; depth 2% to 2^. 

 Highest dorsal ray reaching much beyond middle of fin ; D. 29 ; A. 10 ; 

 V. 10 ; scales S-39-6. Color brownish olive, paler below, the lower fins 

 slightly dusky. Length 30 inches. 



Recorded by Rafinesque for the Ohio, " as far as Pittsburg." 

 Also recorded for the state by Kirtland. " Abundant in the Ohio 

 river," Henshall, 1888. Not recorded for any other point of the 

 state. 



Genus : Carpiodes. 

 Key io Species. 



A. Body sub-fusiform, depth about 3 in length. Dorsal with about 30 rays. — carpio. 

 AA. Body ovate oblong, the back eleva ed, depth about 2% in length. 

 B. Lips thin, silvery white, the halves meeting in a wide angle. 



C Head large, snout blunt ; eye large, 3% to 4. — difformis. 



CC Head small and pointed, the snout projecting, eye small, 5 to $% m > 

 head. — thompsoni. 



BB. Lips full, thick, reddish in life, the halves of lower lip meeting in an acute 

 angle. — velifer. 



Carpiodes carpio (Rafinesque). Big Carp Sucker. 



Head comparatively short, 4 to 5 in body. Body more fusiform than in ■ 

 others of the genus, compressed, but not much arched, depth 2% to 3. . 



