Io. 
FISHES OF THE ROCKY MOUNTAIN REGION- 169 
In lateral profile, height of eye distinctly more than distance from eye to nearest point 
on lower marginof head. . . . . . . WNotropis scylla [also N. piptolepis). 
[Here also see Hybognathus nuchalis, in which the tips of ventrals are only about 14 
mm. short of base of anal. Hybopsis kentuckiensis has a very distinct dark spot at 
base of caudal; Notropis cornutus has a dark lateral band, but no separated spot. 
The three species of Notropis all have a dark dorsal band. WN. zonatus, var., which 
also comes in here, has a pale orange dorsal band.] 
A black spot at base of dorsal fin; middle of head above not tuberculate; barbels 
absent, or small barbels, away from corner of mouth; corner of mouth about level 
with front of eye; body not so deep as in Couesius; pigmentation of sides consisting 
of minute gray rings or diffuse spots; scales with about 16 radiating lines, but these 
hidden by the thick skin. . . . .  Semotilus atromaculatus. 
No black spot at base of eee! mitidte of head above tuberculate; barbels small 
but evident, at corner of mouth; corners of mouth strongly anterior to eye; pigmenta- 
tion of sides consisting of small black dots; scalés with ro or 11 radiating lines, these 
visible through the thinskin. . . . . « «+ Couesius dissimilis. 
The following table of Notropis species is basets on the sification given by Jordan 
and Evermann: 
Teeth 2, 4-4, 2. D8,Ag. Length7to8inches. . . . . . . . WN. cornutus. 
Teeth 4-4 or 1, 4-4, 1. Length 3inchesorless . . . Pea has 6 
I. 
Scales not very closely imbricated, not noticeably queoee aes ioe dorsal inserted 
nearly over the ventrals; anal short, its rays 7 or 8; no black spot on dorsal 
Scales deeper than long, more or less closely imbricated on sides of body; scales 
moderate, 33-38 in lateral line; D 7 or 8, A8; teeth 4-4; male in life brilliant steel blue, 
the belly orange-red, anal and caudal blood red, a conspicuous violet crescent behind 
the shoulders, followed a a crimson crescent; female plain greenish. pees 2t 
PAGHESee ne Hhotey | all) se UN even sase 
Teeth 2-rowed Gh 4-4, an Small leider species; D A A 8; olivaceous, silvery below; 
a broad silvery lateral band, with dark specks; sides of head with black specks; 
a dark dorsal band) Length 3\inches ....9 .)) <0 5s) 2 4 NS popiolemas: 
Teeth 1-rowed (4-4) . : 
Lateral line wanting on some nae: eye i iaege: eaten shove bie ee (he outlines 
very sharply defined; a black stripe through snout and eye; a dusky lateral shade 
and asmall caudal spot. Length 2}inches . . . SU dee eee enGayiaas 
Lateral line complete; D 7, A 7. Color pale, back Heenan: side with a silvery band, 
no spots on fins; a dusky shade on each side of dorsal and before it; some dark spots 
on snout. Length 2{inches . . AL U3 0 INES Sane. 
The following is based on specimens, withiote Pecenee to hike literature: 
Body deep, its depth nearly or quite equal to distance between base of anal and hind edge 
of insertion of pectorals; base of dorsal not before base of ventrals. NN. Jutrensis. 
Body not so deep, its depth not nearly equal to distance between base of anal and hind 
I. 
edge of insertion of pectorals .. . . . sn an as 
Base of dorsal distinctly (1 or 2 scale rows) Hato bace of eae: length over 80 mm. 
Hybognathus nuchalis. 
