60 TELEOSTEIC EVENTOGNATHI. XII. 



decurved; eye 3 in head; 18 scales before D. Brown, a jet-black 

 lateral band ; orange below. Head 3 ; depth about 4^. A. 8. 

 Scales 6-35-3. L. 2. Delaware R. (Lat., steel-colored.) 



mm. Teeth without grinding surface; D. fin nearly opposite V. 

 o. Base of C. with a black spot ; snout and base of D. red in 

 spring. 



119. N. leuciodus (Cope). Slender, the snout rounded; mouth 

 oblique, the lower jaw not projecting ; lateral line nearly straight ; 

 1 2 scales before D. Silvery, a purplish lateral band. Head 4^. 

 A. 8. Scales 5-39-3. L. 3. Holston R. (\CVKOS, white.) 



oo. Base of C. without black spot in adult; <J without red. 

 p. Eye rather large, 3 to 3f in head. 



120. N. jejunus (Forbes). Slender; snout blunt ; mouth rather 

 large, oblique; 16 scales before D. Pale, a silvery lateral band 

 over plumbeous. Head 4 ; depth 4f. A. 7. Scales 5-37-3. L. 3. 

 Penn. to Kans. (Lat., hungry.) 



121. N. scabriceps (Cope). Stout, head heavy, flattish above, 

 with blunt snout ; mouth little oblique ; eye 3 in head ; lateral line 

 decurved; fins small. Olive, with a silvery plumbeous lateral band. 

 Head 4; depth 4}. A. 8. Scales 6-38-3. Kanawha R. (Lat. 

 scaber, rough ; ceps, head.) 



pp. Eye very large, about 2* in head. 



122. N. ariommus (Cope). Body stout, compressed ; head 

 large; snout rather blunt; mouth moderate, oblique, the jaws 

 equal; eye much longer than snout, larger than in any other of 

 our Cyprinidce ; 15 scales before D.; lateral line much decurved. 

 Olivaceous, sides silvery. Head 3| ; depth 4^. A. 9. Scales 

 6-39-2. L. 5. Ind. to N. Ala. (apt, an intensive prefix ; o/z/ua ; 

 eye ; i. e. big-eyed.) 



yy. Base of anal comparatively elongate, its rays 10 to 12 ; D. inserted 



behind V. 



q. Scales comparatively small, closely imbricated along sides ; scales be- 

 fore D. small, 20 to 30; teeth with narrow grinding surface; nuptial 

 colors brilliant. (Lythrurus Jordan.) 

 r. A very distinct roundish black spot at base of first rays of D. 



123. N. ardens (Cope). RED-FIN. Body more or less elon- 

 gate, strongly compressed ; head rather pointed; mouth large, 

 rather oblique, the chin somewhat projecting; eye moderate; D. 

 high; about 30 scales before it; lateral line much decurved. 9 

 very pale, the dorsal spot usually distinct; steel-blue, belly and 

 lower fins brick-red in spring. Head 4^ ; depth 4^. D. 8. A. 11 

 or 12. Scales 9-50-3. L. 3J. Minn, to Va. and Tenn., abundant. 

 Very variable, but the varieties (lythrurus, atripes, cyanocephalus) 

 are hardly worthy of separate names. (Minnilus diplemius Jordan 

 & Gilbert; not diplemius Raf.) (Lat., burning.) 



