LONG-NOSED DACE. 3 857 
Rhinichthys nasutus, AGassiZ, Lake Superior, 353.—GUNTHER, Cat. Fishes Brit. Mus., 
vii, 189, and of most writers. ; 
Argyreus nasutus, COPE, Trans. Am Philos. Soc., 1856, 369. . 
Rhinichthys marmoratus, AGASS1Z, Lake Superior, 1850, 354.—-GUNTHER, Cat Fishes Brit. 
Mus.,, vii, 129. : 
Description.—Body elongate, little compressed, not elevated; head long, the muzzle 
flattened, narrowed and extremely prominent, the meuth being entirely inferior and 
horizonta]; eye nearly median, its diameter contained twice in the length of the 
snout, about five times in head; isthmus wide; barbels evident; lateral line commenc- 
ing opposite the upper posterior angle of the opercle, decurved ; pectoral fins enlarged 
in the males, a small fatty lobe in the axils; color olivaceous or dark green, paler below, 
with numerous dusky punctutations, the back often almost black, some of the scales 
usually irregularly darker, producing a: mottled appearance; no black lateral band; 
youvg specimens with a dusky lateral shade; a blackish spot on the opercle; males in 
spring with the lips, cheeks and all the fins crimson; head 4, depth5; D. 8; A.7; 
scales 14-65-8; teeth 2, 4-4, 2. Length 5 inches. 
Habitat, New England, Middle States, and Great Lake Region, in clear cold water. 
Diagnosis —This species may be known by the very projecting snout 
in connection with the barbels and the very small scales. 
Habits.—This species is fond of clear swift waters, as is the trout. It 
haunts the rapids and rock pools, and its motions are swift and powerful. 
In the State of Ohio, itis not a very common species, but it is found in 
tributaries of Lake Erie, and sometimes in the lake itself. It also occurs 
in the southeastern part of the State. 
Name.—This fish was first described from specimens sent from Niagara 
Falls to the Museum at Paris. It was therefore named Gobio cataractz or 
*‘Gudgeon of the Cataract.” 
79. RHINICHTHYS ATRONASUS (Mitchill) Agassiz. 
Black-nosed Dace; Rockfish. 
var. alronasus. 
Cyprinus atronasus, MITCHILL, Trans. Lit. and Phil. Soc. New York, i, 1814, 460. 
Leuciscus atronasus, DEKay, New York Fauna, Fishes, 1842, 205, and authors. 
Argyreus atronasus, Corr, Cyp. Penn., 1866. 
Rhinichthys atronasus, AGAssizZ, Lake Superior, 1850, 354.—GUNTHER, Cat. Fish. Brit. 
Mus., vii, 191, and of nearly all recent writers. 
var. obtusus. 
Rhinichthys obtusus, AGassiz, Am. Journ. Sci Arts, 1854, 357.—JORDAN, Man. Vert., 
1876, 280; Ann. N. Y. Lye. Nat. Hist., 1876, 331. | 
Argyreus dulcio, GIRARD, Proc. Acad. Nat. Sci. Phila., 1856, 185. 
Argyreus obtusus, GIRARD, Proc. Acad. Nat. Sci. Phila., 1856, 185. 
Rhinichthys ebtusus, GUNTHER, Cat. Fishes Brit. Mus., vii, 1868, 190. 
