78 
86. Notropis phenacobius, Forbes. 
Very rare, at Peoria; not seen elsewhere. 
87. Notropis stramineus, Cope.—StTRAw-COLORED MINNow. 
(Bul. I1., 57; Alburnops stramineus: Synop., 167; Cliola stram- 
uneus: M. V., 291; Hybopsis stramineus.) 
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This species is rare in our collections, and has occurred only in 
rivers and small streams in Central and Northern Illinois. 
88. Notropis fretensis, Cope. 
(Bul. IT., 57; Alburnops fretensis: Synop., 167; Cliola fretensis: 
M. V., 292; Hybopsis fretensis.) 
Very rare in Illinois; not more than a single specimen among all 
our cyprinoids certainly belonging to this species. 
89. Notropis anogenus, Forbes. 
Thus far taken only in Fox River, at McHenry, Illinois. 
90. Notropis heterodon, Cope. 
(Bul. II., 62; Hemitremia heterodon: Synop., 1€3; do.) 
This is, within our limits, essentially a species of lakes and larger 
streams in Northern Illinois, although the form with perfect lateral line. 
has been collected in small numbers from the southern extremity of the 
State. It is one of the most abundant minnows in the smail lakes, 
northward. It likewise inhabits the Illinois River and the bottom: 
lakes communicating with that stream. 
Genus 48. Curioua, Girard. 
SILVER F'Ins. 
91. Chola vigilax, B. & G. 
(Bul. IT, 56; Alburnops tuditanus: Synop., 165; Cliola tuditana.) 
Abundant in small streams throughout Illinois. Seems to have 
been usually confounded with Pimephales notatus, to which it bears 
a strong general resemblance. 
Genus 49. PimepHaues, Raf. 
F'AaT-HEADS. 
92. Pimephales notatus, Raf.—Buunt-noszp Minnow. 
(Bul. II, 55 and 56; Hyborhynchus notatus, Hyborhynchus supercil- 
tosus: Synop., 159 and 160; do.) | 
One of the commonest of our fishes; extremely abundant in the 
prairie streams which characterize so large a part of Illinois. — It chiefly 
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