CYPRiNiD^. — xxn. 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 N. 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, 3J in head, placed high and be- 

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

 A. 7. Scales 7-60-6. L. 4. Tenn. R. (oipav6s, sky; &\Ja, eye.) 



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



u. Snout long and prominent, projecting notably beyond the mouth, about 

 twice length of eye in adult. 



136. R. cataractse (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^; 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 bej'ond the small mouth ; its length 1} 

 times eye. 



137. R. atronasus (Mitchill). Black-kosed 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. HTBOPSIS Agassiz. {Nocomis Girard ; Ceratichthys Baird.) 



(i^os, gibbous ; o^is, face.) 

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

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

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

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

 small, slender species. 

 c. Teeth 4-4. 

 d. Dorsal fin without black blotch ; scales large. 



