31. CYPRINID^E PROTOPORUS. 203 







conic and rather pointed. Mouth rather large, very oblique, upper lip 

 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 5 sides silvery ; a dark vertebral line ; males 

 with the snout tuberculate in spring, the forehead, opercular region, 

 and base of dorsal being then flushed with red. Head 4 ; depth 4j. 

 D. 8 ; A. 10 5 scales 5-39-3. Teeth 2, 4-4, 2, little hooked, one of them 

 sometimes showing a sort of grinding face. L. 23 inches. Ohio Valley. 

 An elegant species. Much smaller than rubellus, with larger head and 

 deeper body. 



(Alburnus nibrifron.i Cope, Proo. Aead. Nat. Sci. Phila. 1805, <S5 : Alburnellus rubn- 

 frons Cope, Cypr. Penu. 18C6, '.JSS : Lruciscus rubri/rons Giinther, vii, 225: Notropis ru- 

 bri/rons Jordan, 296.) 



305. M. jemezauus (Cope) Jor. 



Body slender, with long caudal peduncle. Head large, the muzzle 

 long-acuminate. Mouth large, oblique, the upper lip below the Ime 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 

 plumbeous superior margin 5 a dusky vertebral band. Head 41 ; depth 

 6. D. 8 ; A. 10 ; scales 5-34-2 ; teeth 2, 4-4, 1. L. 3 inches. San Ilde- 

 fonso (Rio Grande), New Mexico. (Cope:} 



(Alburnellus jemczanus Cope, Zool. Wheeler's Expi. W. 100th Mer. v, 650, 1876. ) 

 COG. Ventral fins short, .scarcely reaching beyond front of dorsal. 



306. M. micropteryx (Cope) Jor. 



Body slender, compressed. Head moderate, rather pointed. Mouth 

 large, oblique, the upper lip on the level of the pupil, the maxillary 

 reaching to opposite the front of the orbit. Eye small, about as long 

 as 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 conspicu- 

 ously dark-edged ; a dusky blotch at base of caudal, underlying the 

 silvery lustre. Head 4A; depth 5J. D. 8; A. 10; scales 0-39-2. L. 

 2f inches. Headwaters of Cumberland and Tennessee Eivers. 



(Alburnellus micropteryx Cope, Journ. Acad. Nat. Sci. Phila. 1868, 233. ) 



86. PROTOPOKUS Cope. 

 ;Cope, Haydeu's Geol. Snrv. Terr. 1871, 473: type Protoporux rlomniniis Cope.) 



Body rather stout. Mouth normal. No barbel. Teeth 2, 4-4, 1, 

 hooked, without masticatory surface. Scales small, in 50-60 transverse 



