Jordan and Ever mann. Fishes of North America. 307 



Argyretis dulcis, GIRARD, Proc. Ac. Nat. Sci. Phila., 1850, 185, Sweetwater River, Nebraska. 



(Type, No. 210 (20225). Coll. Bowman.) JORDAN, Bull. U. S. Fish Comm., ix, 1889, 8. 

 Rhinichtliys itKuciUosu*, COPE, Proc. Ac. Nat. Sci. Phila^, 1864, 278, Kansas. (Coll. Hammond.) 



COPE & YARROW, Zob'l. Wheeler Survey, v, 644, 1875. 

 RhinicMliy.i tmnsiHontunn*, COPE, Amer. Nat., July, 1879, 441, tributaries of Rio Grande in 



Colorado and New Mexico. (Typo, No. 17084. Coll. Yarrow.) 

 Rhinichtliys ocella, CARMAN, Science Observer, 1881, 58, Northeastern "Wyoming and 



Montana. 

 RhinichUiys lutetts, CARMAN, Science Observer, 1881, 59, Bear River, Ogden, Utah ; scales 



below lateral hue about 14. 

 Rhinichtftys dulcis, JORDAN & GILBERT, Synopsis, 885, 1883 ; EVERMANN, Bull. U. S. Fish Comm., 



xi, 1891, (1892), 42. 

 Rhinichtliys maxillosus and Iransmontanus, JORDAN & GILBERT, Synopsis, 207, 1883. 



508. RHINICHTHYS SIMUS, Garman. 



Head 4. D. 9 ; A. 8 ; scales 9-60-7. Head depressed above and in front 

 of eyes; snout rather broad, thin, little projecting. First ray of dorsal 

 midway between eye and base of caudal. Clouded brown, a dark lateral 

 stripe, bordered above by a silver one. Coahuila, Mexico. (Garman); 

 not seen by us. (simus, oiftoc;, blunt-nosed, an epithet early applied to 

 Socrates.) 



Rhinichthys simus, GARMAN, Science Observer, 1881, 61, Coahuila ; JORDAN & GILBERT, Synopsis, 

 886, 1883. 



509. RHINICHTHYS ATRONASUS (Mitchill). 



(BLACK-NOSED DACE.) 



Head 4; depth 4^; eye 1 in snout, 4| in head. D. 7; A. 7; lateral line 

 64 ; teeth 2, 4-4, 2. Body moderately elongate, little compressed. Head 

 moderate, rather broad and flattish above. Snout moderate. Mouth 

 small, horizontal, subterminal, the lower jaw included ; barbel minute 

 but probably always present ; upper lip on level of the lower part of 

 pupil ; maxillary not reaching nearly to eye. Eye small, nearly median. 

 Fins rather small ; dorsal fin well back, its insertion about midway be- 

 tween nostril and base of caudal. Scales quite small, somewhat embedded. 

 Color blackish above ; some of the scales irregularly darker ; a black band 

 passing from snout through eye and along sides of body ; a paler streak 

 below this ; belly silvery ; males in spring with the lateral band and the 

 lower fins, and sometimes the whole body, bright crimson ; males in late 

 summer with the lateral band scarlet or orange, the red color growing 

 fainter later in the season. Length 3 inches. New England to Minnesota, 

 Northern Alabama, and Virginia; very abundant in clear brooks and 

 mountain streams. Excessively variable, running into several varieties, 

 the extremes of which seem like distinct species, (ater, black ; nasus, 

 nose.) 



Cyprinus atronasus, MITCHILL, Trans. Lit. and Phil. Soc. N. Y., I, 1815, 460, Wallkill River; 



brooks of New York; MITCHILL, Amer. Monthly Mag., i, 1817, December, 289. 

 Cyprinus viUatus, RAFINESQUE, Amer. Monthly Mag. i, 1817, 121, December, Hudson River 



above the Falls. 

 Rhinichthys atronasus, GCNTHER, Cat., vn, 191, 1868; JORDAN & GILBERT, Synopsis, 208, 1883. 



