CYPRINID^E. — XXVI. 61 



rr. No distinct black spot at base of D. in front. 



s. Body rather deep and compressed, the depth 21 to 4j in length. 



124. N. umbratilis (Girard). ^ with the body very deep ; 9 

 comparatively elongate ; snout short and blunt ; mouth terminal, 

 wide, oblique ; lower jaw included ; eye about 4 in head ; 30 scales 

 before D. Olivaceous, thickly dusted with black specks ; fins in 

 ^ all jet-black ; paler or dusky in 9 i body and fins flushed with red 

 in spring. Head 4 ; depth (male) 2|. A. 10 or 11. Lat. 1. 40. L. 3. 

 111. to Kansas and S., locally common. Very variable. (iV. macro- 

 lepidolus Forbes (111.) seems to be the same, but with 19 scales 

 before D.) (Lat., shady.) 



«5. Body elongate, the depth even in males about 1 the length. 



125. N. lirus Jordan. Very slender; eye 3 in head. Color 

 pale, silvery ; sides with a band of metallic blue ; series of black 

 dots on bases of D. and A. ; males with red fins. Head 4^ ; depth 

 b\. A. 10. Scales 8-45^. L. 2^. Tenn. and Ala. (Xetpds, pale.) 



qq. Scales comparatively large, not closely imbricated ; scales before D. 

 large, in about 15 rows; teeth without grinding surface; D. inserted 

 behind V.; mouth oblique, the lower jaw scarcely shorter; elon- 

 gate, silver\' species, the males usually with snout and base of dorsal 

 rosy. (NotropisA) 

 t. Fins moderate, the ventrals extending beyond middle of dorsal. 



126. N. photogenis (Cope). Slender, compressed; mouth ob- 

 lique, the jaws subequal ; maxillary not quite to orbit ; lateral line 

 decurved ; eye large, 3|- in head, as long as snout. Greenish, sides 

 silvery. Head 4i ; depth 5^. A. 10. Scales 6-40-3. L. 3. Penn. 

 to W. Va. and S. {(f>ais, light; yews, cheek.) 



127. N. telescopus (Cope). Similar to preceding, the D. farther 

 forward, not much behind V., midway between snout and C. ; eye 

 very large, 2|- in head ; mouth oblique, the jaws subequal ; scales 

 above dark-edged. Head 4l; depth 5. A. 10. Scales 5-38-3. 

 L. 3^. Tenn. R. (rrj'KerTKon-os, far-seeing.) 



128. N. dilectus (Girard). Body moderately elongate, the back 

 scarcely elevated, the tail slender ; head longer than in related spe- 

 cies, rather pointed ; mouth rather large, oblique, the jaws subequal ; 

 eye moderate, 4 in head. Olivaceous, sides silvery ; vertebral line 

 faint. Head 4l; depth 4f. A. 10. L. 2f. Ohio to Neb. and 

 Ark. Common. JMucli smaller than N. atherinoides, with longer 

 head. (Alburnellus ruhrifrons and percohromus Cope.) (Lat., 

 delightful.) 



129. N. atherinoides (Rafinesque). Body comparatively elon- 

 gate, compressed, the back not elevated ; head short, blunt ; mouth 

 moderate, very oblique, maxillary reaching front of eye ; eye large, 



• The species of this group are extremely closely related, and in some cases 

 scarcely distinguishable. 



