(40) 

 Genus RHEOCRYPTA , Jordan. 



9. *Eheocri/pta copelandi Jordan. Copeland's Darter. (M. V. 222.) 



Known only from White River, near Indianapolis. 



Genus DIPLESIUM, Rafinesque. 



10. I) iplesmm blenmoides (Jiait) Jordan. Green-sided Darter. (M. V. 

 222.) 



Abundant in the Wabash valley, Crawford Co. 



Genus BOLEOSOMA, Dekay. 



11. Boleosoma olmstedi (Storer) Agassiz. Tessellated Darter. (M. V. 

 224 ; Nelson, 35). Lake Michigan, Ogle Co. 



12. Boleosoma maculatum Agassiz. Johnny Darter (M. V. 224 ; 

 Boleosoma hrevipinne Nelson, 36.) 



Common throughout the state, in clear streams. Pine Cr., 

 Ogle Co.; Illinois R., Pekin ; Normal ; Drury Cr., Union Co.; 

 Clear Cr. 



[13. Boleosoma camiirum^ Forbes, n. s. 



In re-examining the collections of the Laboratory for the purpose of 

 adding to this paper the details of distribution and other minor points, I 

 made a few observations on some Etheostomatidae and Cyprinidae which 

 seem worthy of record, and I therefore insert them here, at the suggestion of 

 Dr. Jordan. 



Specimens from several localities in the state, mixed sometimes with 

 Boleosoma maculata and sometimes with Boleichthi/s eo>', prove, on closer 

 examination, to be a Boleosoma quite distinct from mactdata, and appa- 

 rently undescribed. 



The general appearance is much like that of maculata, but the lateral 

 line is incomplete, the species is more slender, has a greater number of ver- 

 tical rows of scales, a blunt nose and a scaly head. 



The length is from 45 to 50 mm. Depth 5| to 6 in length, caudal 

 peduncle 3^, head 4 to 44. Eye 31 in head, nose f eye, and almost ti'un- 

 cate. Mouth inferior, horizontal, upper jaw the longer, and decidedly pro- 

 tractile. There are no naked areas, except a narrow strip before the dor- 

 sal. Vertical rows of scales 54 to 57, with the lateral line usually extend- 

 ing over from 23 to 35 scales. 5 longitudinal rows above lateral line. In 

 a few specimens 35 to 50 mm. long, there is only a trace of a lateral line on 

 4 or 5 scales. Scales smaller before dorsal, about A those on sides. 



D. IX or X— 10 to 12, A. 1—8 or 9. ifpper D. half as high as 

 long, about .5 height of 2d D., and contiguous to it. Second -3- length of 

 first, and |^ longer than anal. Anal spine weak and short, length of fin A its 

 height. Ventrals and pectorals reach the same point, § to vent. 



