DEFORMED CARP SUCKER. 813 
Description.—Body short and deep, the back arched, head thick, the muzzle notably 
blunt but less so than in C. difformis ; anterior edge of mandible in advance of the 
orbit; the maxillary just reaching the line of the lower rim of the orbit ; eye smallish, 
43in head; anterior rays of dorsal longer than the base of the fin inserted about mid- 
“way between snout and base of caudal; head 4; depth 2}; D., 26; scales 7-37-5, 
Length, one foot. 
Habitat, Mississippi Valley, generally abundant. 
Diagnosis.—This is one of the species with a very blunt head and very 
high dorsal fin. The head is normal in appearance, not distorted as in 
C. difformus. 3 
Habits.—This species is abundant in the Ohio, and is not usually dis- 
tinguished by the fishermen from C. velifer. 
The name, cutisanserinus (goose-skinned), alludes to the presence of 
minute tubercles on the snout of the male in the spawning season. 
36. CARPIODES DIFFORMIS Cope. 
Deformed Carp Sucker. 
Carpiodes difformis, CopE, Proc. Am. Philos. Soc. Phila., 1870, 480.—JoRDAN, Man. Vert., 
1876, 297; 2d Ed., 1878, 321; Proc. Acad. Nat. Sci. Phila., 1877, 72; Bull. U. S. Nat. 
Mus., 9, 1877, 50; xii, 1673, 195.\—JoRDAN and COPELAND, Check List, 1876, 158.— 
JORDAN and GILBERT, in Klippart’s First Report Ohio Fish Commission, 66, pl. xiii, 
f. 21, 1877. 
Description.—Body short and deep, the back considerably arched ; head very thick, 
the muzzle exceedingly blunt, almost truncate, so that the anterior edge of the mandi- 
ble is in line with the anterior rim of the orbit, and the maxillary reaches to the an- 
terior edge of the pupil; anterior suborbital bone deeper than long; eye large, 34 to 4 
in head ; dorsal fin with its anterior rays very long, longer than the base of the fin; the 
first ray of the dorsal nearer the muzzle than the base of the caudal; head 41; depth 
24; D., 24; scales 6-31-4. Length, one foot. 
Habitat, Ohio Valley. 
Diagnosis.—This species resembles a monstrosity of the preceding, 
which indeed it may really be. 
Habits.—But two or three specimens of this species are now known, all 
from the Wabash and lower Ohio. 
GENUS 18. CYCLEPTUS. Rafinesque. 
Cycleptus, RAFINESQUE, Journal de Physique, de Chimie et d’Histoire Naturelle, Paris, 
1819, 421. | 
Rhytidostomus, HECKEL, Fische Syriens, Russeggers Reisen, 1842, p. 1023. 
Catostomus et Sclerognathus, sp., AUCT. 
Type, Cycleptus nigrescens, Rafinesque, = Catostomus elongatus, LeSueur. 
Etymology, kuklos, round; leptos, small. ‘‘The name means small, round mouth.” 
(Rafinesque.) 
