214 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
scarcely greater than the width of the iuterorbital space. Preorbital 
bone large, oblong, conspicuous, and silvery. Mouth rather small, hor- 
izontal, the lower jaw included, the edge of the premaxillary below the 
level of the eye, the maxillary not reaching to the vertical from the 
front of the orbit. Barbel quite small. Snout boldly and abruptly do- 
curved much as in C. amblops, the tip of the snout thickened, forming a 
sort of pad. Lateral line decurved. Rows of scales along the back 
converging behind the dorsal where the upper series run out, as in 
Minnilus cornutus. Fins rather higher and more falcate than in G. 
higuttatm. The dorsal tin inserted well forward, over ventrals. Pec- 
toral tins pointed, not reaching ventrals, ventrals not reaching vent. 
Teeth 4-4, hooked, without grinding surface. Translucent greenish 
above; sides and below brilliantly silvery; cheeks and opercles with a 
bright silvery lustre; fins plain ; a slight plumbeous lateral shade. Head 
4^; depth 4. D. 8; A. 8; scales 5-42-4. L. 5 inches. Falls of the Ohio. 
(Jordan, Proc. U. S. Nat. Mas. 1879, 238.) 
331. C. amblops (Raf.) Grd . — Silver Chub. 
Body rather slender, somewhat heavy anteriorly, not much com- 
pressed. Head large, somewhat flattened and broad above. Eye very 
large, longer than snout and longer than iuterorbital space, 3 in head. 
Mouth horizontal, subinferior, and rather small. Muzzle bluntly de- 
curved. Upper lip below level of orbit, maxillary not reaching the line 
of the front of the orbit. Barbel evident. Fins moderate. Lateral 
line somewhat decurved. Sixteen scales before dorsal. Color translu- 
cent greenish above ; scales somewhat dark-edged ; sides with a bright 
silvery band, which overlies dark pigment, so that sometimes a plumbe- 
ous or even blackish band appears ; a dark band through eye around 
snout ; males without tubercles or red coloration. Head 4 ; depth 5. 
D. 8; A. 7 ; scales 5-38-4 ; teeth 1, 4-4, 1. L. 2-4 inches. Ohio Valley 
and southward. Southern specimens (var. wincheUi) have the head 
narrower and the barbel rather shorter. 
(Ilatiliis amblops Raf. Ichtli. Oh. 1820, 51: ? Hiibopsis gracilis Agassiz, Amer. Joura. 
Sci. Arts, 1854, 358; Gobio vernalis anA Ughopsis ■winchclli Grd. Proc. Acad. Nat. Sci. 
Phila. 1856, 188, 211: Ceratichthgs hgalinus Cope, Joiirn. Acad. Nat. Sci. 1889, 236: 
4Jeratickilajs Itijalinus Giinthev, vii, 179: Nocomis amt (ops Jordan, Ann. Lyc. Nat. Hist. 
N. Y. 1876, 328.) 
332. C. riibrifi’OMS Jordan. 
General forui of the preceding. Head long, narrower than in the pre- 
ceding, longer than in the next. Eye moderate, 3^—31 in head, wider than 
(The interorbitid space. .Aloutli smaller, inferior, overhung by the bluntly 
