31. CYPRINID.E PROTOPORUS. 
203 
<}onic and rather pointed. Mouth rather large, very oblique, upper lii> 
above the line of the middle of the pupil, the maxillary reaching to op- 
posite the eye. Eye moderate, anterior, 4 in head. Olivaceous above ; 
scales with darker edges; sides silvery; a dark vertebral line; males 
with the snout tuberculate in spring, the forehead, opercular region, 
and base of dorsal being then Hushed with red. Head 4 ; depth 4|. 
D. 8 ; A. 10 ; scales 5-39-3. Teeth 2, 4-4, 2, little hooked, one of them 
sometimes showing a sort of grinding face. Ij.2| inches. Ohio Valley. 
An elegant species. Much smaller than ruhellus, with larger head and 
deeper body. 
(Alburntts riwri/roiifi Coim, Proc. Acad. Nat. Sci. Pliila. 1835, 85: Alburnellus riibri- 
fronn 0op(», Cypr. Pemi. 18JG, 388 : Leucisciis ruhrifrons Gunther, vii, 225 : Notropia ru- 
.Jordan, 2'J6.) 
304. M. jcmc^asaus (Cope) Jor. 
Body slender, with long caudal peduncle. Head large, the muzzle 
long-acuminate. Mouth large, oblique, the upper liji below the Ikie of 
the pupil, the maxillary extending beyond front of orbit. Eye mod- 
erate, 3§ in head. Dorsal rather posterior, the tips of the ventrals ex- 
tending beyond its last ray. Olivaceous ; a broad silvery band, with 
j)himbeous superior margin ; a dusky vertebral baud. Head 4i ; depth 
6. D. 8 ; A. 10 ; scales 5-34-2 ; teeth 2, 4-4, 1. L. 3 inches. San llde- 
fonso (Rio Grande), New Mexico. [Cope.) 
(Alburnellus jemczanua Cope, Zool. Wheeler’s Expl. W. 100th Mer. v,650, 1876.) 
«cc. Ventrul fins short, scarcely reaching beyond front of dorsal. 
30U. UI. macropteryx (Cope) .Jor. 
Body slender, compressed. Head moderate, rather ])ointed. Mouth 
large, oblique, the upper lij) on the level of the pupil, the maxillary 
reaching to opposite the front of the orbit. Eye small, about as long 
ns muzzle, 3.^ in head. Scales large. Lateral line decurved. Fins all 
quite small, the dorsal farther back than in any of the preceding 
species, so that the short ventrals do not reach much beyond its ante- 
rior rays. Color olivaceous; sides bright silvery; dorsal scales consjn'cu- 
ously dark-edged; a duskj^ blotch at base of caudal, underlying the 
nil very lustre. Head 4.§ ; depth 5^. D. 8; A. 10; scales 0-30-2. L. 
2^ inches. Headwaters of Cumberland and Tennessee Rivers. 
{Alburnellus microptcryx Cope, .Journ. Acad. Nat. 8ci. Phila. 1868,233.) 
86.— PKOTOPOKUS Cope. 
(Cope, H.ayden’s Geol. Snrv. Terr. 1871, 473: type Protoporus donminua Cope.) 
Body rather stout. Mouth normal. No barbel. Teeth 2, 4-4, I, 
hooked, without masticatory surface. Scales small, in 50-00 transverse 
