242 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
rather flattened above. Jaws equal, the inaxillarj' reaching to orbit. 
Dorsal fin inserted behind ventrals. Anal fin quite small. Scales 
rather small. Dusky bluish above, pale below ; scales everywhere with 
fine pnnctulations. Head depth 4^. D. 9; A. 7; scales 13-C1-7; 
teeth 2, 5-5, 2 , with narrow grinding surface. Lost liiver, Oregon. 
{Cheonda coerulca Grd. Proc. Acad. Nat. Sci. Phila. 1856, 207, and IT. S. Pac. R. R. 
Surv. Fisli. 295.) 
400. S. cooperi (Grd.) Jor. & Gilb. 
Body elongate, subfusiform. Head moderate, the snout thickish, 
subconical, slightly projecting. Mouth oblique, the maxillary not quite 
reaching to the eye. Eye large, 4J in head. Fins large, the anal no- 
tably so. Dorsal somewhat behind ventrals. Coloration plain, rather 
pale. Head 4^; depth 4J. D. 85 A. 10; Lat. 1. 03. Columbia liiver. 
{Cheonda cooperi Grd. Proc. Acad. Nat. Sci. Phila. 1856, 207, and U. S. Pac. R. K. 
Surv. Fish. 294: Leuciscus cooperi Giinther, vii, 243.) 
401. S. iiis'rescens (Grd.) Jor. &l Gilb. 
Body rather elongate, subfusiform. Head long and rather jiointed. 
Caudal peduncle long. Mouth terminal, oblique, the maxillary scarcely 
reaching to eye. Snout prickly in male specimens. Fins moderate, the 
dorsal slightly behind ventrals. Color very dark, the sides with black 
spots, the scales with fine pnnctulations. Head 34; depth 4. I). 8 ; 
A. 7; scales 16-70-10; teeth 2, 4 (-5,2 ?). Boca Grande and Janos 
Kiver. 
{TUjonia nigrescens Grd. Proc. Acad. Nat. Sci. Phila. 1856, 207, and U. S. Mex. Bound. 
Surv. Ichth. 64.) 
402. S. inodestiis (Garm.) J. & G. 
Brownish, paler below ; flanks not lustrous as in S. nigrescens. Form 
moderately stout, the outlines regular. Dorsal behind ventrals, its free 
border convex. Anal truncate. Distinguished from S. nigrescens by 
the greater length and the shajic of the head, and a difference in the 
position of the dorsal. Head 3^ ; depth 3f. D. 8 ; A. 8 ; scales 14-65-9. 
Saltillo, Coahuila. 
{Cheonda viodesta Garmau, Bull. Mus. Comp. Zool. viii, 92, 1881.) 
103.— PHOXIi\US Agassiz. 
Minnoics. 
(Agassiz, M(?iu. Soc. Nat. Hist. Neufchatel, i, 37, 1837: type Cyprinus phoxinns L. = 
Phoxinus loivis Ag. ; the commou “Minnow” of Europe.) 
Body stout. Mouth normal, without barbel. Teeth 2, 5-5, 2, or 2, 
5-4, 2, hooked, without grinding surface. Scales usually small, little 
