50 NOTES ON INDIANA FISHES. 



specimens differed from E. pellucidum chiefly in the less complete squa- 

 mation, "the cheeks and opercles [being furnished] with rather few thin 

 scales imbedded in the skin," and the "body naked, except for a strip 

 of scales along- the lateral line, consisting of five or six series of small 

 imbedded, wide-set, ctenoid scales. On the caudal peduncle this band 

 widens out, covering the whole depth of the tail." 



In typical E. pellucidum, the cheeks, temporal region, and opercles 

 are covered with imbedded, more or less cycloid scales. 



A large lot of " Sand Darters" were collected in the Wabash at Deb 

 phi, ami an examination of the series shows that there are several speci 

 mens which till the description of E. clarum very well, while others 

 show all degrees of squamation from the very imperfectly scaled clarun 

 to the almost completely scaled pellucidum. In some specimens tin 

 cheeks are bare and the opercles densely scaled, in others the operclei 

 have but few scales, while in yet others no scales can be detected upoi 

 the head at all. Corresponding differences are found in the scales o 

 the body, some almost scaleless, others with a few rows along the lat 

 eral line, and others with more and more rows. No constant or impor 

 taut differences can be noticed in measurements. 



The dorsal rays of a large series were counted and X-10 was found tj 

 be the usual number, though a few counted IX-10, and one XI-10. 



From a consideration of these facts we feel justified in reducing 

 clarum to subspecific rank, making it stand as Etheostoma pellucidu 

 clarum. 



We may add that specimens recently collected from the Wabash i 

 Terre Haute show a similar gradation, with possibly a greater perceutag 

 of the subspecific form. 



63. Etheostoma nigrum Raf. Johnny Darter. 

 Everywhere ; perhaps the most abundant Darter of the region. Som 



exceedingly large individuals were obtained in Honey Creek. 



64. Etheostoma blennioides Raf. Green-sided Darter. 



Rather common in Wild Cat, but less so in the two Deer Creeks an 

 the Wabash. Found by Professor Jenkins in the Tippecanoe. Nl 

 seen in Honey Creek. 



65. Etheostoma copeiandi (Jordan). 



Abundant in the Wabash at Delphi, but not seen elsewhere. Tin 

 little Darter was first described in 1877, by Dr. Jordan, from the Whit 

 River at Indianapolis. Since then it has been reported from the White' 

 River at Gosport, Ind., and numerous specimens were taken in Septem- 

 ber, 1887, by Professor Evermanu, from the Wabash, at Terre Haute. 

 The home of the species seems to be in Arkausas, it having been found 

 very common in tributaries of the Arkansas River near Fort Smith, and 

 in the Washita at Arkadelphia. and the Saline at Benton by Profes- 

 sors Jordan and Gilbert. 



