(60) 

 Genus NOTBOPIS, Rafinesque. 



107. Notropis ruhrifrom (Cope.) Jordan. Rosy faced Minnow. (M. 

 V. 296; Minnilus ruhrifrom 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 afherinoides Raf. Emerald Minnow. {Notropis rubellus, 

 dinemus and dilectus M. V. 296 ; 3Iinnilus dVectus, amabilis, ruhellus 

 and dinemus Nelson 46, 47.) 



Everywhere very abundant, caught by the thousand for bait off 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 Luxihis cornutus, 

 Semotillus corporalis, Campostoma anomalum or Ceraticlithys biguttatus, all 

 species of similarly wide distribution. Normal, Geneva, Pine Cr., Chicago, 

 Henry, Union Co., Peoria, Oregon, 111. 



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 srabriceps Cope. Rough-headed Shiner. {Cliola sca- 

 bi'iceps 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 4f in 

 length to caudal, head 4; eye 3! in head, equal to nose, in terorbital space 

 2f 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. 



