31. CYPEINID^ EHINICHTHYS. 
207 
canal short. Scales verj- small. Lateral line continuous. Dorsal fin 
inserted behind the ventrals. Anal basis short. Size small. Colora- 
tion dark, rosy in spring. (/itV, snout; fisk; the snout in most 
species being prominent.) 
313. K. cataruclae (Val.) Jor. — Long-nosed Dace. 
Body elongate, little compressed, not elevated. Head long, the muz- 
zle flattened, narrowed, and extreme!}^ prominent, the mouth being en- 
tirely inferior and horizontal. Eye nearly median, its diameter con- 
tained twice in the length of the snout, about 5 times in head. Isthmus 
wide. Barbel evident. Lateral line commencing opposite the upper 
posterior angle of the opercle, decurved. Pectoral fins enlarged in the 
males. Color olivaceous, paler below, with numerous dusky x)unctula- 
tions ; the back often almost black ; some of the scales usually irregu- 
larly darker, producing a mottled appearance; no black lateral bands j 
young specimens with a dusky lateral shade; a blackish spot on the 
opercle; males in spring with the lii)s, cheeks, and lower fins crimson. 
Head 4; depth 5. D. 8; A. 7; scales 14-G5-8; teeth '2, 4-4, 2. L. 5 
inches. New England to Virgiida and Wisconsin; frequenting clear 
and boisterous streams and rock-pools. 
{Gobio cataractce Cuv. & Val. xvi, 315,1842: Leuciscus nasutus Ayres, Best. Jonrn. 
Nat. Hist, iv, 299,1843: Argyreus nasutus Cope, Cypr. Peiiu. 369: Bhinichthys nasutus 
Giiutlier, vii, 189: CeraticJithys cataractce Gunther, \ni, 176: Bhinichthys marmoratus 
Agassiz, Lake Superior, 354: Bhinichthys marmoratus Giiuther, vii, 189.) 
314. R. Diaaxillosiis Cope. 
Body elongate, not elevated. Head long, the muzzle long and project- 
ing, as in the preceding species, but rather heavier, the mouth broader, 
the maxillary extending nearly to the eye. Barbel evident. Eye small, 
high up, median, 5| in head. Fins small, caudal not deeply forked. 
Lateral line decurved. Silvery; darker above; a dusky lateral shade, 
at least in the young. Head 4; depth 5. D. 8; A. 7; scales 11-70-8. 
L. 5 inches. Upper Missouri region southeastward. Very close to the 
preceding. 
(Cope, Proc. Acad. Nat. Sci. Phila. 1864, 278.) 
315. R. tr»iiS3iioittaBius Cope. 
This species, the common Rhinickthys of New Mexico, differs from 
Rhinichthys maxillosus in having the dorsal fin equidistant between the 
base of the caudal and the end of the muzzle, and in having the longi- 
tudinal series of scales below the lateral line more numerous (12-13). 
