(60) 
Genus NOTROPIS, Rafinesque. 
107. Notropis rubrifrons (Cope.) Jordan. Rosy faced Minnow. (M. 
V. 296 ; Minnilus rubrifrons Nelson 47.) 
Abundant in the Ohio and Wabash vallies. I have examined 
specimens from Rock River, and Mr. Nelson gives it from tribu- 
taries of the Illinois. Oregon ; 111. R. 
108. Notropis atherinoides Raf. Emerald Minnow. ( Notropis rubellus , 
dinemus and dilectus M. V. 296; Minnilus dilectus , amabilis, rubellus 
and dinemus Nelson 46, 47.) 
Everywhere very abundant, caught by the thousand for bait olf the 
wharves at Chicago. The species termed dinemus , rubellus, jaculus, arge , 
dilectus , and amabilis , seem to shade into one another in the most exasper- 
ating way, and until some permanent character is shown, I propose to drop 
the farce of considering them as distinct, and to adopt for all the oldest spe- 
cific name applied to one of the type, viz : atherinoides Raf. The species as 
thus defined, is a very variable one, but not more so than Luxilus cornutus, 
Semotillus corporalis , Campostoma anomalum or Ceratichthys biguttatus , all 
species of similarly wide distribution. Normal, Geneva, Pine Cr., Chicago, 
Henry, Union Co., Peoria, Oregon, HI. 
Genus EPISEMA, Cope & Jordan. 
109. * Episema ariomma (Cope) Jor. Big-eyed Shiner. ( Cliola ari- 
omma M. V. 298.) 
White River, Indiana, abundant in still places in the river ; not 
yet recognized elsewhere, though doubtless occurring in Illinois. 
110. * Episema s^abriceps Cope. Rough-headed Shiner. ( Cliola sea - 
briceps M. V. 298; Photogenis scabriceps Nelson 47.) 
White River; not yet noticed in Illinois. 
[111. Episema jejuna Forbes, n. s. 
A number of specimens, from the 111. R., of a pale fish of rather slender 
and graceful form have been assigned to this genus with some doubt. The 
irregularly beveled face of the pharyngeal teeth simulates a masticatory sur- 
face, although the extreme edge is more or less crenate. The teeth are dis- 
tinctly hooked, 1 or 2, 4-4, 1 or 2, (in one case, apparently abnormal, 5, 2.) 
The dorsal begins a little before the ventrals ; the mouth is large and 
oblique, the upper jaw (from middle of front margin to tip of maxillary) be- 
ing contained 3 times in the head. 
The total length of my largest specimens is 3 inches. Depth 4§ in 
length to caudal, head 4; eye 33 in head, equal to nose, interorbital space 
23 in head ; depth of head in length to caudal 6 or 7 times. 
The scales are 5-37-3, with 15 or 16 before the dorsal. The lateral 
line is decurved on the anterior fifth. 
