CATOSTOMID%. an 
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 /. dubalus, about 4 in length. Eye about equal to snout, 5% 
in head, much smaller than in 7. dudalus. Mouth large, considerably 
oblique, approaching that of 7. cyprinella. Body much less elevated and 
compressed than in /. dudalus, the back not at all carinated; 3 to 34% in 
length. D.30; A. 10; scales 8-41-7. Longest ray of dorsal scarcely 4 the 
length of base of fin; anal rounded. Colors very dark, fins all black. ‘‘ Not 
always separable from /. cyprinel/a, 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 234. 
Highest dorsal ray reaching much beyond middle of fin; D. 29; A. 10; 
V. 10; scales 8-39-6. 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 to Species. 
A. Body sub-fusiform, depth about 3 in length. Dorsal with about 30rays.— 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. 
¢ Head large, snout blunt ; eye large, 3% to 4.— difformis. 
CC. Head small and pointed, the snout projecting, eye small, 5 to 5% in 
head.— thompsont. 
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.. 
