202 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 



301. M. percobromus Cope. 



Body moderately elongate. ^Head rather long, the muzzle acuminate. 

 Mouth oblique, the jaws equal, the maxillary extending behind front of 

 orbit. Eye moderate, 3^ in length, as long as snout. Dorsal beginning 

 slightly behind ventrals. Seventeen scales in front of dorsal. Color 

 pale, with lateral silvery band ; dorsal scales and scales at base of cau- 

 dal with dark punctulations. Head 3'^ ; depth 4|. D. 8 j A. 11 ; scales 

 7-37-3 ; teeth 2, 4-4, 2. L. 2 inches. Saint Joseph, Mo. {Cope.) 



{Alburnelliia percohromus Cope, Haydeu's Geol. Surv. Wyona. 1870, 440.) 



302. M, raitoelSais (Ag.) Jor. — Rosy Minnow. 



Body long and slender, compressed, the back not elevated. Head 



blunt, conic, proportionately shorter than in the other sijecies. Mouth 



moderate, very oblique, upper lip on the level of the upper part of the 



pupil, maxillary about reaching to the front of the eye. Eye large, 



rather longer than snout, 3| in head. Fins low; the dorsal well behind 



the ventrals, the tips of the ventrals extending to beyond the middle of 



the dorsal. Lateral line decurved. Color translucent green above; 



sides bright silvery ; scales above faintly punctate, but not enough to 



render them dark-edged, nor to form blotches along the sides; a faint 



dark vertebral line; males in spring with the snout rosy. Head4f ; 



depth 5i. D. 8 ; A. 11 ; scales 5-38-3 ; teeth 2, 4-4, 2. L. 5 inches. 



Great Lake region and Ohio and Mississippi Valleys ; abundant in lakes 



and river channels. Variable. The largest and handsomest species of 



this genus. 



{??Notropis alherinoides Raf. Amer. Month. Mag. & Grit. Rev. 1818, 204 (very doubt- 

 ful, perhaps a Noiemigonus): Aliurnus rubellus Agassiz, Lake Superior, 18.''»0, 3o4: Al- 

 burnus nitidus Kirtland, Cleveland Ann. Sci. 1854, 44 : Alhurnelliis jaculus and urge 

 Cope, Cypr. Peun. 1866, 387 : Leudscus ruhellus and copei Giinther, vii, 254, 25.5.) 



303. Jn. dinemus Raf. — Emerald Minnow. 



Very similar to the preceding, but smaller and more compressed, with 



shorter snout, smaller eye, narrower and more convex interorbital space, 



which is not wider than eye, and shorter ventrals, which scarcely reach 



the middle of the dorsal. Colors very pale; lips dusky. Head 4|; 



depth 5 J (to 4J). D. 8; A. 10; scales 0-38-3; teeth 2, 4-4, 2. L. 3.^ 



inches. Ohio Valley. Described from specimens taken at the Falls of 



the Ohio. 



(Minniltis dinemus Rat Ichth. Oh. 45: Alburnus dileclun Grd. Proc. Acad. Nat. Sui. 

 Phila. 1856, 193: Alburnellas dilectus Grd. U. S. Pac. R. R. Surv. x, 2.59: Notropis dilectus 

 and dinemus Jordan, Man. Vert. 29G, 297.) 



304. M. riibrifrons (Cope) Jordan.— /i;osi/-/acfd Minnow. 



Body moderately elongate, the back scarcely elevated, the ca.udal 

 peduncle somewhat contracted. Head longer than in the other species, 



