238 Bulletin 47, United States National Museum. 



375. LEUCISCUS HYDROPHLOX (Cope). 

 (SiLVEU-sii)Ki) Minnow; ' I'o-he-wa.') 



Head 4J ; depth 4 ; eye large, 3,^ to 3* in head, equal to interorbital space. 

 D. 9 ; A. 10 to 13, usually 10 or 11. Scales 12-58-5. B;jdy rather elongate, 

 but deep and compressed, formed as in the section Clinostoynus. Head 

 rather small, short, compressed, but broad above, the jaws ecjual. Mouth 

 oblique, short, the maxillary reaching front of orbit, the upper lij) oppo- 

 site middle of orbit. Snout decurved and rather obtuse. Lateral line 

 decurved; 33 scales in front of dorsal iin. Coloration greenish silvery; 

 the back dusky ; a dark bine or blackish lateral band betvreen 2 silvery 

 stripes ; the lateral band and below bright orange-red in the males, the 

 red usually ceasing at front of anal ; a bright silvery or golden crescent 

 on cheeks ; a golden streak from snout above eye to gill opening ; speci- 

 mens in alkaline waters are very pale. Length 3 to 5 inches. Salt Lake 

 Basin ; excessively abundant in Provo Kiver, Jordan River, and other 

 clear streams ; also recorded from the Snake River at Idaho Falls and else- 

 where in its upper waters as far as Heart Lake, Wyoming ; the fish fauna 

 of this region being mostly identical with that oi Lake Bonneville, which 

 was once tributary to Snake River. The species bears some resemblance 

 to N^otrojns coccogcnis in form, color, and habits. Our description is drawn 

 primarily from specimens from Provo River, typical of L. tunia. L, 

 montanua is exactly the same, but L. hydrophiox may prove to have slen- 

 derer head and smaller eye. (vduf), water ; (plui, liame.) 



Ctitiiistoiiiiis hyilrophlux, Cope, Hayden's Geol. Surv. Mout. for 1871, 475, 18712, Blackfoot 



Creek, Idaho. 

 Clhi'islonuismoiituims, CorE, J. c, 47G, Grass Creek, Idaho; Cope, Proc. Ac. Nat. Sci. Phila., 



1874,136. (Type, Nos. 15771, 15772, and 12>J08. Coll. Y.arrow.) 

 Cliniiatomus kuiia, CoPE, Proc. Amer. Philos. Sue. Pliila., 1874, 133, Utah Lake, Provo, Utah. 



(Type, No. 1G935. Coll. Yarrow.) 

 Gila viontana, CoPE, Zoiil. Wlieeler Surv., v, 657, 1875, (1870). 

 SqtutUns hi/drophlox, tiinia, aud montanus, Johdan & Gilbert, Synopsis, 234, 1883. 

 Leiiciscus montanus, Jordan, Bull. U. S. Fish Comm., ix, 1889, 32. 

 Leucisciis hydrophiox, Jordan, I. c, 48. 



Subgenus RICHARDSONIUS, Girard. 

 376. LEUCISCUS BALTEATUS (Richardson). 



Head ii; depth 3i; eye 3i. D. 10; A. 11 to 22, usually 16; vertebne 40. 

 Scales 13-55 to 63-6; teeth 2, 5-4, 2, without grinding surface. Body 

 strongly compressed aud somewhat elevated. Head small, the snout 

 rather short and conical. Mouth terminal, oblique, the lower jaw slightly 

 projecting. Gill rakers A'ery small. Eye large. Anal and caudal large. 

 Dorsal low, much behind ventrals. Base of anal 4^^ in length. Colora- 

 tion plain, the sides bright silvery, usually with a dark lateral band; 

 sides and belly silvery ; cheek with a silvery crescent; a pale streak above 

 eye and opercle, crimson in males in spring. Length 4 to 6 inches. 

 Columbia River and streams about Puget Sound; generally abundant 

 everywhere in the Columbia Basin, and very variable; the specimens 



