202 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
301. M. percobromits Cope. 
Body moderately elongate. Head rather long, the muzzle acuminate. 
Month 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 i)unctulations. Head ; depth 4|. D. 8; A. 11 ; scales 
7-37-3 ; teeth 2, 4-4, 2. L. 2 inches. Saint Joseph, Mo. {Cope.) 
(Albiirnellus percobronuis Cope, Hayden’s Geol. Surv. Wyom. 1870, 440.) 
302. M. rsabeBBaas (Ag.) Jor. — Eosy Minnoiv. 
Body long and slender, compressed, the back not elevated. Head 
blunt, conic, proportionately shorter than in the other species. 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. Head4§; 
depth 51. 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. ^ 
{ffNotropis alherinoides Raf. Amer. Month. Mag. & Crit. Rev. 1818, 204 (very doubt- 
ful, i)erhaps a Noiemigonus) : Albiirnus rubellus Agassiz, Lake Superior, 18.')0, 344: Al^ 
biinius nitidus Kirtland, Cleveland Ann. Sci. 1854, 44: Alburmllus jacitlus and arge 
Cope, Cypr. Penn. 1866, 387 ; Lmciscm rwbelliis and capei Giintber, vii, 254, 255.) 
303. 1?I. dinemus Raf. — Emerald Minnow. 
Very similar to the preceding, but smaller and more compressed, with 
shorter snout, smaller eye, n.arrower 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 4f; 
depth 5J (to 4 jJ). 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. 
{Minnilus dinemus llai. Ichth. Oh. 45: Albi(7'nu8 dilectus Grd. Proc. Acad. Nat. Sci. 
Phila. 18.56, 1!)3: AlburneJlus dilectus Grd. U. S. Pac. R. R. Surv. x, 2.59: Noiropis dilecfns 
and dinemus Jordau, Man. Vert. 296, 297.) 
304. ITI. I’llbl'if I’OIBS (Cope) Jordan. — Rosy-faced Minnoiv. 
Body moderately elongate, the back scarcely elevated, the caudal 
peduncle somewhat contracted. Head longer than in the other species, 
