274 REPORT OF STATE GEOLOGIST. 



2. Lateral line wholly wantiog. Scales along the sides in fewer 

 than forty transverse rows. microperea, p. 283. 



Etheostoma ouachit.e J. and G, 



Jordan and Gilbert, 1887, 23, 49. 



Form elongated and slightly compressed. Depth in the length about 

 six and one-half times. Head in the length four. Snout equal to diam- 

 eter of the eye, three and one-half in length of head. Profile descend- 

 ing gently to the upper lip. Mouth rather large, horizontal, the lower 

 jaw included, the maxillary reaching the anterior margin of the orbit. 

 Caudal peduncle slender. Cheeks and opercle scaly ; sometimes, however, 

 smooth or with imbedded scales. Dorsal rays XI or XII, 13 ; anal rays 

 II, 10. Scales of the body in forty-six to fifty-two transverse rows. 

 Color in alcohol olive, with about eight brown blotches along the lateral 

 line, and about as many across the back alternating with those along 

 the lateral line. A dark stripe in front and behind the eye and another 

 below it. The one behind the eye is continued on the operculum. Dor- 

 sals and pectorals with faint bars of light and dark. The species closely 

 resembles E. peliaiwn, a species found east of the Alleghany Mountains. 

 E. ouachitce was originally described from the Washita River in Arkan- 

 sas, but it has more recently been taken at Patoka, in Gibson County 

 (4, '88, 160) and. at New Harmony (4, '88, 113). Some of the speci- 

 mens taken there were three inches 1 >ug, larger than the original types. '-^^ 



Etheostoma aspro Cope and Jordan. 

 Black-sided Darter. 



Alvordius aspro, Jordan and Gilbert, 1882, 8, 501. 



Body elongated and somewhat compressed. Depth in the length five 

 to six times. Head rather short, not high, pointed in front, contained in 

 the le(ugth four to four and one-half times, Interorbital space equal to 

 the diameter of the eye, four times in length of head. Mouth moderate, 

 the maxillary reaching back to the pupil. Gill-membranes scarcely 

 united. Preopercle not serrated. Scales usually about 8-65-12 ; some- 

 times as many as seventy-five in a longitudinal row The belly with a 



■•■■Ethkostoma MACROCEPHALU^r Cope. 



Alvordius maerocephahis, Jordan and Gilbert, 1882, S, 501. 



This -species has been taken in Western Pennsylvania and miiy be iMiked for in south- 

 eastern Indiana. Hence, a short dcsca-iption of it is included. 



Depth in length seven. Head in length three and thrc-n-fourths. Snout long, three and 

 oue-fourth in head. Mouth large, terminal. Palatine teeth present. Cheeks uak^d; oper- 

 cles wholly 'T almost wholly naked; sometimes with a row of scales along the upper edge 

 of the subopercle. A row of enlarged scales along the mid-ventral line; or, if these are 

 wanting, a naked strip. Dorsal rays XIV, 13. Anal rays 11, 11. Olive, with about teru 

 brown spots along the sides and a spot at the base of the caudal. Length three inches. 



