CYPRINIM. XXVI. 63 



bb. Breast naked. 



134. P. mirabilis (Girard). Body rather slender, the caudal 

 peduncle short ; snout blunt, prominent ; eye 4 in head. Pale 

 greenish, a silvery lateral band and a conspicuous black spot at 

 base of C. Head 4; depth 4. A. 7. Scales 6-50-5; lateral 

 line varying from 43 (var. scopifer Cope) to 52. L. 4. 111. R. 

 to X. Texas, abundant ; sexes similar. (Lat., wonderful.) 



aa. Scales small, about 60 in lateral line; breast naked. 



135. P. uranops Cope. Body very slender; tail long; head 

 long, flattish above ; snout broad, blunt ; mouth inferior, larger 

 than in other species ; eye large, 31 in head, placed high and be- 

 hind middle of head; 24 scales before D. Head 4f ; depth 6. 

 A. 7. Scales 7-60-6. L. 4. Tenn. R. (ovpavos, sky; oty, eye.) 



59. RHINICHTHYS Agassiz. (piv, snout ; ixOvs, fish.) 



a. Snout long and prominent, projecting notabty beyond the mouth, about 

 twice length of eye in adult. 



136. R. cataractae (Cuv. & Val.). LONG-NOSED DACE. Body 

 elongate, subterete; eye nearly median, 5 in head; barbel evident; 

 P. enlarged in males. Dusky olive, irregularly mottled; no dis- 

 tinct lateral band ; a dusky spot on opercle ; male with lips, cheeks, 

 and lower fins crimson in spring. Head 4 J ; depth 5^. D. 8. A. 7. 

 Scales 14-65-8. L. 6. Mass, to Va. and Montana, in clear moun- 

 tain streams. Larger than the next and with longer snout. (Leu- 

 ciscus nasutus Ayres.) (Lat., of the cataract ; first taken at 

 Niagara.) 



aa. Snout moderate, projecting little beyond the small mouth; its length 1 

 times eye. 



137. R. atroiiasus (Mitchill). BLACK-NOSED DACE. Body 

 moderately elongate; head rather large; eye small, 4^- in head; 

 fins small ; barbel minute, sometimes obsolete. Blackish, the scales 

 mottled above ; a black or brown lateral band, bordered above and 

 below by pale ; spring with this band and lower fins crimson, the 

 color changing to orange in summer. Head 4 ; depth 4^. D. 7. A. 

 7. Scales 4-63-8. L. 3. Maine to Iowa and Ala., very abundant 

 in all clear brooks. Variable. (Lat. ater, black ; nasus, nose.) 



60. HYBOPSIS Agassiz. (Nocomis Girard ; CeraticTithys Baird.) 

 ({-/So'?, gibbous ; ctyris, face.) 



a. Species of moderate or small size, the mouth inferior, horizontal. Color 



silvery; preorbital broad ; sexes more or less alike, (ffybopsis.) 

 b. Eye moderate or small, 3| to 5 in head ; barbel very long (rarely dupli- 

 cated); lower lip rather thick; D. usually more or less behind V.J 

 small, slender species. 

 c. Teeth 4-4. 

 d. Dorsal fin without black blotch ; scales large. 



