356 L. Agassiz on Fishes of the Tennessee River. 
C. Urus, but it is larger and more strongly arched behind. The 
hind margin of the scales is waving, owing to a somewhat prom- 
inent middle angle. The anterior rays of the dorsal equal in 
length two-thirds of that of the base of the fin. Anal not lunate 
behind. The veutrals do not reach to the anal opening. Cau- 
dal not so deeply furcate as in C. Cyprinus. 
3. Carpiodes Bison, Agass.—F'rom the Osage River, Missouri. 
This species is more elongated than C. Taurus. The head is 
smaller, the opercle also smaller, and the subopercle triangular. 
The dorsal has its anterior rays longer, hence its hinder border is 
more deeply emarginate. Aval more deeply Innate. Horizontal 
diameter of scales greater. I have received this species through 
the attention of Mr. George Stolley. 
4. Carpiodes Vitulus, Agass—From the Wabash River, Indi- 
ana. This seems to be a smaller species than the preceding ones. 
The form of the body resembles that of C. Taurus; but the eyes 
are smaller; the opercle is more broadly rounded behind; the 
subopercle has its posterior and free border regularly arched above 
and below, and not emarginate as in C. Taurus. The direction 
of the numerous water tubes on the head and cheeks also differ. 
The upper and lower borders of the scales are nearly straight. 
The dorsal does not extend quite so far forwards. I am indebted 
to Col. Richard Owen of New Harmony for this species. 
5. Carpiodes Vacca, Agass.—From the Susquehannah River. 
This species resembles more closely C. Cyprinus than any other ; 
the anterior rays of the dorsal are also very elongated, yet they 
do not reach beyond the base of the fin itself when bent back- 
wards; the candal is not so deeply furcate, and the scales have a 
greater horizontal diameter. I owe this species to the kindness 
of Professor 8. S. Haldeman. 
Carosromus, Lesweur.—The following species of this genus 
have been collected by Dr. Newman in the vicinity of Huntsville: 
Calostomus communis, Lesueur.—Called Fine-scaled Sucker 
at Huntsville, 
sae nigricans, Lesueur.—Called Hog Sucker at Hunts- 
ville. 
Catostomus Duquesnii, Lesueur.—Called May Sucker at 
Huntsville. 
Catostomus melanops, Kirtl—Also called May Sucker at 
Huntsville. This species agrees with Kirtland’s description of 
C. melanops, except in having longer pectorals and in the reddi 
color along the sides. Rafinesque’s description cannot apply '0 
this fish. “Having no specimens from the localities mentioned by 
Rafinesque and Kirtland, I do not venture to pursue furtber 4 
comparison between these fishes. agers 
nse, em cid 
€ Superior,” page 353. Several new species have b 3 
