21G CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 
aud most distinct posteriorly ; a dusky band on head, through eyes and 
snout; fins plain. Head depth 54. D. 8; A. 7; scales 6-47-5; 
teeth 4-4, often with slight grinding surface. L. 5 inches. Ohio Val- 
ley and tributaries of the Great Lakes. 
{Leuciscus dissiniilis Kirtlaud, Bost. Jouru. Nat. Hist, iii, 341, 1840: Ceratichthys dis- 
similis Cope, Cypr. Penn. 367 : Ceratichthya dissimilis Giiuther, vii, 177.) 
335. C. sterJetus Cope. 
Body slender, with long caudal iieduucle, the least depth of which is 
little more than a third of the greatest depth of the body. Head long 
and slender, the muzzle much projecting and broadly rounded. Mouth 
moderate, inferior, the maxillary not reaching the front of orbit. Bar- 
bels conspicuous. Eye moderate, 4.^ in head. Fins rather long, the 
caudal deeply forked. Color silvery; sides with a few dusky scales; 
forehead pink in the males, as in G. rubrifrons. Head 4 ; depth 4|. D. 
8; A. 7; scales 6-30-5; teeth 4-4. Rio Grande, in New Mexico. {Cope.) 
(Cope, Zool. Wheeler’s Expl. W. 100th Mer. v, 652, 1876.) 
336. C. Eestivalis (Grd.) Cope. 
Head contained about 4| times in the total length. Dilfers from G. 
gelidus and G. vernalis, its American congeners, by a rather compressed 
body, elevated and arched upon its middle region, and tapering rapidly 
towards the peduncle of the tail. The snout is more protruding than 
in G. gelidus, the eye larger, and the ventral fins inserted somewhat 
more forwards. The scales are also larger (about 36 in the lateral line 
in the figure), deeper than long, anteriorly subtruncated and posteriorly 
rounded, with radiating furrows uj)on the latter section only. D. I, 8; 
A. I, 7, etc. The color is yellowish brown, somewhat lighter beneath 
than above, with a silvery streak along the middle of the flanks. Rio 
San Juan, Cadareita, New Leon. ( Girard.) (Of course these little fi.shes 
have no intimate relation with the European genus Gohio, which is an 
ally of Seniotilus, with the teeth 3, 5-5, 3, and the barbel lateral and 
very long.) 
{Gohio ceatiralia G'lxaxd, Proc. Acad. Nat. Sci. Phila. 1856, 189.) 
33'3'. C. gelidus (Grd.) Jor. 
Body very slender, not elevated. Head slender and elongate, the 
snout prominent and tapering. Eye small, rather high, 4 in head. 
Mouth small, subtermiual, the maxillary not extending to the eye. 
Fins large. Lateral line decurved. Scales rather large. Coloration 
silvery; a dusty lateral streak, and a blackish .spot at base of caudal. 
