31. CYPRINnXE CHROSOMUS. If) 3 



116. It. exiBflcauda B. & G. 



Body deep, compressed, tapering to the caudal peduncle, which is 

 very slender. Head small, short, conical. Mouth rather small, oblique, 

 the upper lip on the level of the lower part of the pupil, the maxillary 

 falling short of the eye. Preorbital short and deep ; suborbital moderate. 

 Eye rather large, anterior, 4 in head. Scales rather large, 42 in front 

 of dorsal. Dorsal tin rather small. Pectorals short. Anal high and 

 long. Caudal well forked, its rudimeutal rays strong, about 10 in num- 

 ber. Color dark above, sides somewhat silvery. Scales with dark 

 specks. Head 4f ; depth 3J. D. 10; A. 12; scales 13-04-8; teeth 4-5 

 or 5-5. L. 12 inches. Elvers of California. 



(Baird & Girard. Proc. Acad. Nat. Sci. Pliila. 1854, 137 ; Girard, U. S. Pac. R, R. 

 Snrv. x, 241: Lcuciscus exilicauda Giinther, vii, 248: Larinia harenyus Girard, Proc. 

 Acad. Nat. Sci. Phila. 1856, 184; the same species.) 



75. CHROSOMUS Rafmesque, 1820. 



Red Minnows. 



(Rafmesqne, Iclith. Oh. 47: type Luxilus erythrofjaster Raf.) 



Body moderately elongate, little compressed. Jaws normal; no bar 

 bel. Teeth 5-5 or 4-5, moderately hooked, with well-marked grinding 

 surface. Alimentary canal elongate, about twice as long as body ; peri- 

 toneum black. Scales very small. Lateral line short or wanting. Dor- 

 sal behind ventrals; anal basis short. Size small. Colors in spring 

 brilliant. (/>?, color; o-<u/za, body.) 

 * Sides of the body with two black stripes ; the upper running from the upper angle 



of the opercle straight to the caudal, sometimes breaking up in spots behind; 



the lower broader, extending from the snout through the eye, curved down- 



ward along the belly, and extending to the caudal, where it ends in a black 



spot (these stripes faint in the female). 



C. erytlirogaster Agassiz. Eed-^eUied Dace. 

 Body oblong, tapering each way from the middle, little compressed. 

 Head moderate, rather pointed. Mouth moderate, terminal, oblique, 

 the jaws about equal. Fins rather small ; the dorsal and anal high and 

 short; caudal long. Scales quite small, firmly attached, but not much 

 imbricated. Lateral line developed less than half the length of the 

 body. Color brownish olive, with a dusky dorsal line and often some 

 blackish spots ; two black lateral bauds as above described ; between 

 these a bright, silvery area. Belly below the lower baud abruptly sil- 

 very. Females obscurely marked. Males in spring with the belly and 

 the interspace between the lateral bands bright scarlet ; bases of the 

 vertical fins also scarlet. In high coloration the body is everywhere 



