238 Bulletin 47, United States National Museum. 



375. LEUCISCUS HYDROPHLOX (Cope). 



(SiLVER-SIDED MlNNOW; " PO-HE-WA.' 1 ) 



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. Body rather elongate, 

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

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

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

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

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

 the back dusky ; a dark blue or blackish lateral band between 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 River, Jordan River, and other 

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

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

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

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

 to Notropis coccogenis in form, color, and habits. Our description is drawn 

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

 montanus is exactly the same, but L. hydrophlox may prove to have slen- 

 derer head and smaller eye. (vdup, water ; $/,o>, flame.) 



Clinostomus hydrophlox, COPE, Hayden's Geol. Surv. Mont, for 1871, 475, 1872, Blackfoot 



Creek, Idaho. 

 Clinostomus montanus, COPE, I. c., 476, Grass Creek, Idaho; COPE, Proc. Ac. Nat. Sci. Phila., 



1874, 136. (Type, Nos. 15771, 15772, and 12908. Coll. Yarrow.) 

 Clinostonnis tienia, COPE, Proc. Amer. Philos. Soc. Phila., 1874, 133, Utah Lake, Provo, Utah. 



(Type, No. 16935. Coll. Yarrow.) 



Gila montana, COPE, Zool. Wheeler Surv., v, 657, 1875, (1876). 

 Stjualms hydrophlox, tamia, and montanus, JORDAN & GILBERT, Synopsis, 234, 1883. 

 Leuciscus montanus, JORDAN, Bull. U. S. Fish Comm., ix, 1889, 32. 

 Leuciscus hydrophlox, JORDAN, I. c., 48. 



Subgenus RICHARDSONIUS, Girard. 

 376. LEUCISCUS BALTEATUS (Richardson). 



Head 4i; depth 3; eye 3$. D. 10; A. 11 to 22, usually 16; vertebra 40. 

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

 strongly compressed and somewhat elevated. Head small, the snout 

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

 projecting. Gill rakers very 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 



