JUNE, 1896. ON SOME COLLECTIONS OF FISHES HAY. 91 



22. Lepomis pallidus (Mitch.). BLUE SUNFISH. 

 Two specimens. 



23. Lepomis megalotis (Raf.). BIG-EARED SUNFISH. 



Five examples were secured, which range in size from 2^4 to 

 3^4 inches total length. In the 'larger ones the opercular flap has 

 begun to enlarge, but in the smaller specimens it is inconspicuous. 

 In all the young specimens before me, including four from 

 the Desplaines river, the black opercular Map is margined 

 behind with a pale stripe, which was red in life. All the specimens, 

 too, have a minutely spotted appearance, which arises from the fact 

 that the center of each scale is dusky. In some cases there are also 

 faint traces of six or eight narrow cross-bands on the sides. Longi- 

 tudinal dark stripes are sometimes present on the cheeks, sometimes 

 absent. 



24. Lepomis gibbosus (Linn.). PUMPKIN-SEED. 



A single specimen of this species, so common in the lake 

 region, was secured. 



25. Microptrous dolomieu Lac. SMALL-MOUTHED BLACK BASS. 

 Four specimens, varying from 2^ to 4^ inches, total length. 



26. Micropterus salmoides (Lac.). LARGE-MOUTHED BLACK BASS. 

 A single individual. 



27. Etheostoma aspro (Cope 6 Jord.). BLACK-SIDED DARTER. 

 Four specimens. 



28. Etheostoma microperca/0/v/. 6 Gilb. LEAST DARTER. 

 Six specimens were obtained. 



29. Stizostedion vitreum (Mitch.). WALL-EVE. JACK SALMON. 

 One specimen 8^ inches long. Base of the pectoral fin with a 



dark spot. 



