234 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
373. S. (Cope) J. & G. — Leather-sided Minnow. 
Body rather elongate, but deep and compressed, formed as in Clino- 
stomus proper. Head rather small, short, compressed, but broad above, 
the jaws equal. Mouth oblique, short, the maxillary reaching the front 
of the orbit, the upper lip opposite middle of orbit. Eye large, 3-^ in 
head, equal to interorbital space. Lateral line decurved ; 33 scales in 
front of the dorsal fin. Coloration greenish silvery; the back dusky ; a 
blackish lateral band, between two silvery stripes; the lateral band and 
below bright orange, red in the males. Head 4^; depth 4. D. 9; A. 
10 or 11; scales 12-58-5. L. 3-5 inches. Salt Lake Basin; abundant 
in Provo Eiv'er. Very close to the next, differing in shorter anal and 
rather deeper body. 
(Clhiostoinus tcenia Proc. Amer. Pliil. Soc. Pliila. 1874, 13.3: Gila tienia Cope, Zool. 
Wheeler’s Expl. W. 100th Mer. v, G58.) 
373. S. mositasitis (Cope) J. & G. 
Body rather slender. Muzzle decurved, obtuse, but less so than in S. 
fceiiia. Jaws equal; end of maxillary extending beyond margin of orbit. 
Eye large, 34 in head, equal to interorbital space. Anal fin elongate. 
Lateral line decurved. Olive above; a dark lateral band; sides crimson 
in males. Head!; depth 4. D. 9;*A. 12; scales 12-5G-G. L.3| inches. 
Idaho to Arizona; abundant in the Utah Basin, with the preceding. 
{Clinostomus monianns Cope, ILiydeu’s Gcol. Siirv. Moot. 1871, 476, and Proc. Acad. 
Nat. Sci. Phila. 1874, BIG: Gila montana Cope, Zool. Wheeler’s Exxd. W. 100th Mer. v, 
657.) 
374. S. eiEsmboldfi (Grd.) ,J. & G. 
Body short and deep. Head moderate. Mouth terminal, oblique, 
the cleft rather short, the maxillary reaching front of eye. Eye large, 4 
in head. Lateral line little decurved. Dorsal fin rather behind ven- 
trals. Anal fin rather elongate. Color bluish; sides with two dusky 
lateral bands. Scales large. Head 4; depth 3. D. 8; A. 12; scales 
12-5G-8; teeth 2, 4-5, 1. Humboldt Eiver, ISTevada. 
(Tigoma humholdii Grd. Proc. Acad. Nat. Sci. Phila. 18.56,206, and U. S. Pac. R. R. 
Snrv. X, 291.) 
aa. Anal basis short, its rays 8-9. 
l>. Scales in lateral line 50-65. 
375. S. ci’uoreiis J. & G. 
Body moderately elongate, symmetrical, not strongly compressed. 
Head broad, rounded above, maxillary reaching front of eye. Eye 
rather large, 4^ in head. Lateral line running low. Dorsal a little 
behind ventrals, scarcely nearer base of caudal than snout. Caudal 
