214 REPORT OF STATE GEOLOGIST. 



is closely related to atherinoides, and is probably only a variety of it. It 

 is characterized by a projecting jaw, a slightly larger eye, a straight lat- 

 eral line, a slenderer form, and a blackish line bordering the upper edge 

 of the lateral silvery band. Great lakes to Tennessee. In Indiana 

 atherinoides has been taken at various points. Carroll County (23, '88, 

 46); Knox, Gibson and Posey counties (^, '88, 183); Marion County 

 (i, '77, 377) ; Franklin County (23, '88, 57) ; Parke and Cass counties 

 (24, '93, 89); Clark County (23, '88, 56). The form arge is reported 

 from Carrol! County (23, '88, 47); Fulton and Cass counties (4, '88, 

 158). Eel Eiver system (4, '94, 37). Professor Forbes found that the 

 greater part of the food of this species cnn.«ists of insects and small crus- 

 taceans. It lives in the clear waters of the larger streams and lakes* 



Genus RHINICHTHYS Agassiz. 



Intestinal canal ni)t more than twice the length of the body. Teeth 

 2-4-4-2, with hook, without grinding surface. Mouth small and in- 

 ferior; the upper lip not protractile; the maxillary with a barbel, but 

 this sometimes difficult ot detection. Dorsal fin behind the ventrals. 

 Scales along the lateral line sixty or more. 



Rhinichthys A'lRONASUS (Mitchill). 

 Black-Nosed Dace. 



Jordan and Gilbert, 1882, <!>', 208. 



Body rather elongated and but little compressed. Depth in length 

 about four and oue-hulf. Head flat above; its length in length of head 

 and body four times. Snout of moderate length. Mouth small, inferior, 

 and the maxillary with a minute barbel. Eye shorter than the snout. 

 Scales, 11-65-9. Color, dark above; many of the scales with blotches 

 of black. A band passing along the side, usually black, but in the males 

 during the breeding season this is bright red. Aiter the breeding season 

 is over this color fades to orange and yellow. Sometimes large portions 

 or the Vv'hole of the male's body may be red. The females are plainer in 

 their coloration. The length is about three inches. 



Maine to Iowa and South. Indiana localities : Decatur County (Shan- 

 non) ; Carroll County (23, '88, 47) ; Kankakee River (1, '77, 45) ; Ma- 

 rion County (1, '77, 377); Franklin County {33, '88, 57); Monroe 



-Genus PHENACOBIUS Cope. 



This genus is characterized by a short intestine; teeth, 4-4 or 1, 4, 4, 1, without grinding 

 surface; inferior mouth; lower lip developed as a fleshy lobe on each side; dorsal fin in 

 front of ventrals; and small scales. One of its species, P. mirahilis, has been taken in the 

 Illinois River, and, according to Nelson (ii, No. 1, 46), as far east as McLean County, 111. 

 It may, therefore, occur as far east as Indiana. The body is slender; depth in length, four 

 and one-fourth; mouth small; scales along the lateral line, fifty-one; color olivaceous, with 

 a silvery lateral band. 



