LONG-NOSED BACK. 857 



Bhinichthys nasutua, A6A88IZ, Lake Sapeiior, 353. — Guntheb, Cat. Fishes Brit. Mna., 



vii, 189, and of most writers. 

 Argyreus nasutua, Copb, Trans. Am Philos. Soo., 1856, 369. 

 Ehinichthya marmoratua, Agassiz, Lake Superior, 1850, 354. — Gunthbr, Cat. Fishes Brit. 



Mna., vii, 169. 



Descnption. — Body elongate, little compressed, not elevated ; head long, the mnzzle 

 flattened, narrowed and extremely prominent, the month being entirely inferior and 

 horizontal ; 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 theopercle, decurved ; pectoral fins enlarged 

 in the males, a small fatty lobe in the axils ; color olivaceous or daik green, paler below, 

 with numerous dusky pnnctutations, the back often almost black, some of the scales 

 usually irregularly darker, producing a mottled appearance ; no black lateral band ; 

 young specimens with a dnsky lateral shade ; a blackish spot on the operole ; males in 

 spring with the lips, cheeks and all the fins crimson; head 4, depth 5; D. 8; A. 7; 

 scales 14-65-8 ; teeth 2, 4-4, 2. Length 5 inches. 



Habitat, New England, Middle States, and Great Lake Kegion, 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 ewift and powerful. 

 In the State of Ohio, it is 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 Gdbio cataracts or 

 " Gudgeon of the Cataract." 



79. Rhinichthys ateonasds (Mitchill) Agassiz. 

 Black-nosed Dace ; Rockflsh. 



var, atronasua. 



Cyprinua atronasua, Mitchill, Trans. Lit. and Phil. Soc. New York, i, 1814, 460. 

 Leuciscua atronaaua, DeKay, New York Fauna, Fishes, 1842, 205, and authors. 

 Argyreus atronasus, Copb, Cyp. Penn., 1866. 



Ehinichthya atronaaua, Agassiz, Lake Superior, 1850, 354.— Gunthek, Cat. Fish. Brit. 

 Mus,, vii, 191, and of nearly all recent writers. 



var. ottusua. 

 Ehinichthya obtuaus, Agassiz, Am. Journ. Sci. Arts, 1854, 357.— Jokdan, Man. Vert., 



1876, 280; Ann. N. Y. Lyo. Nat. Hist., 1676, 331. 

 Argyreus duldo, Girakd, Proc. Acad. Nat. Sci. Phila., 1856, 185. 

 Argyreus oituaua, Girard, Proc. Acad. Nat. Sci. Phila., 1856, 185. 

 Ehinichthya obtusua, Guntheb, Cat. Fishes Brit. Mus., vii, 1868, 190. 



