32 THE FISHES OF OHIO. 
Anterior rays of dorsal short, much thickened and osseus at base, especially 
in adults, the longest ray a little more than 4 the base of the fin, which con- 
sists of 30 rays; caudal moderately forked. Eye medium, anterior, 4% in 
head. Muzzle short, but projecting beyond mouth. 36scales in lateral line. 
Limited in its distribution to the Ohio and its larger tribu- 
taries. ‘‘ The commonest species of its genus in the Ohio river, 
and it is often found in the streams of the interior,’’ Jordan. 
Very abundant in the Ohio river, Henshall, 1888 ; Ohio river at 
Bellaire, R. C. Osburn, 1900. 
Carpiodes difformis Cope. 
Syout very blunt, the maxillary reaching to front of pupil. Nostrils 
very near tip of snout. Lips thin, silvery colored in life, the lower 9-shaped. 
Head 4% in body ; depth 2% to 23, the back considerably elevated. Eye 
quite large, 3% to4 in head. D. 24, its first rays very high; A. 8; V.9; 
scales, 6-35-4. 
Recorded for the state by Jordan, under the name of C. 
cutisanserinus (Cope), as ‘‘ abundant in the Ohio.’’ C. cutisan- 
serinus is now regarded as identical with C. difformis. ‘‘ Abund- 
ant in Ohio river, young common in Little Miami river,’’ Hen- 
shall, 1888. Klippart, in his first report, says of this species, 
that it ‘‘ abounds in Lake Erie, but this must be a mistake, prob- 
ably in regard to the species, as C. difformis is not, I believe, 
known to occur in the St. Lawrence System.”’ 
Carpiodes thompsoni Agassiz. LAKE CARP. 
Body stout, short, the back much elevated, depth 2% in length. Head 
small, 4 to 4% in length, the snout pointed; lips thin, white, meeting at a 
wide angle. Eye small, 5 to 5% in head. Tip of lower jaw much in advance 
of nostrils ; maxillary reaching line of orbit. Dorsal of about 27 rays, aris- 
ing about midway from snout to base of caudal, its anterior rays high, 74 as 
long as base of fin. A.7; V. 10; scales rather closely imbricated, 8-39 to 
4o-6. 
‘‘ Abundant in Lake Erie. I have examined many specimens 
from Sandusky Bay,” Jordan; Lake Erie, Henshall, 1889; 
Lorain County, ‘‘not very common,’’ McCormick, 1892; Lake 
Erie at Toledo, Jordan and Evermann (Bull. 47, U. S. Nat’l. 
Mus. ). 
