CYPRINIDA. — XXVL 63 
6b. 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 44; depth 4}. A. 7. Scales 6-50-5; lateral 
line varying from 43 (var. scopifer Cope) to 52. L. 4. Ill. 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, 3} in head, placed high and be- 
hind middle of head; 24 scales before D. Head 43; depth 6. 
A. 7. Scales 7-60-6. L.4. Tenn. R. (otparéds, sky; dw, eye.) 
59. RHINICHTHYS Agassiz. (piv, snout; iy@vs, fish.) 
a. Snout long and prominent, projecting notably beyond the mouth, about 
twice length of eye in adult. 
136. R. cataractz (Cuv. & Val.). Lone-nosep Dacre. 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 44; depth5}. D.8. A. 7. 
Scales 14-65-8. LL. 6. Mass. to Va. and Montana, in clear moun- 
tain streams. Larger than the next and with longer snout. (Leu- 
ciseus nasutus Ayres.) (Lat., of the cataract; first taken at 
Niagara.) 
aa. Snout moderate, projecting little beyond the small mouth; its length 14 
times eye. 
137. R. atronasus (Mitchill). Buacx-xosep Dacre. Body 
moderately elongate; head rather large; eye small, 44 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 4-638-8. L.3. Maine to Iowa and Ala., very abundant 
in all clear brooks. Variable. (Lat. ater, black; nasus, nose.) 
60. HYBOPSIS Agassiz. (Nocomis Girard; Ceratichthys Baird.) 
(iBés, gibbous ; dys, face.) 
a. Species of moderate or small size, the mouth inferior, horizontal. Color 
silvery; preorbital broad; sexes more or less alike. (Hybopsis.) 
&. 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.; 
small, slender species. 
ec. Teeth 44, 
d. Dorsal fin without black blotch; scales large. 
