LAMPREYS AND FISHES OF INDIANA, 219 



sorae game qualities. Professor S. A. Forbes found that this fish re- 

 ceived less thau oue-half of its food from the auimal kingdom. The 

 vegetable matter eaten by it was made up of filamentous algse and seeds 

 of grasses. The auimal food consisted mostly of insects, mostly of 

 neuropterous larvaj. Crayiisbes bad been eaten by a few of the .speci- 

 mens examined.* 



Genus SEMOTILUS Rafinesque. 



Alimentary canal not more than twice the length of the body. Teeth 

 in two rows, four or five in the outer row, and two in the inner row. No 

 grinding surface. Maxillary with a barbel, which is often minute. 

 Mouth terminal. Dorsal beginning somewhat behind the ventrals. 



Semotilus atromaculatus (Mitchill). 

 Horned Dace; Chub. 



Semotilus corporalis, Jordan and Gilbert, 1882, 8, 221 ; Jordan, 1884, 

 J2, 617, pi. 228 ; Semotilus atromaculatus, Bicknell and Dresslar. 



Form rather heavy; head large and broad. Depth in length, four; 

 head in length, three and three-fourths. Mouth large, terminal, some- 

 what oblique; the maxillary with a small barbel, which can be detected 

 in the young only with difficulty. Teeth, 2-5-5-2 ; sometimes only four 

 in one of the outer rows; without grinding surface. Eye small, five in 

 head. Dorsal fin somewhat behind the ventrals ; its rays, seven ; 

 anal rays, eight. Scales small, crowded forward, 10-52 to 65-7; thirty 

 in front of the dorsal fin. Color leaden, the younger specimens with a 

 dusky or black baud along the side. Dor.*^al fiu with a black spot at its 

 base in frout. Breeding males with coarse tubercles ou the snout. May 

 reach a length of ten inches. 



Distributed from Massachusetts and Vii'ginia to Louisiana and Dakota. 

 Abundant in all streams. 



Carroll, Marshall, Clarke, Ohio and Franklin counties (^5, '88, 48-57); 

 Monroe County (i, '85, 410); Marion County (1, '77, 376); Kivers of 



-Genus COUESIUS Jordan. 



Alimentary canal short. Teeth, 2, 4-4, 2, without grinding surface. Maxillary with a 

 barbel at its extremity. Premaxillaries protractile. Scales small, fifty or more along the 

 lateral line. 



CouESius PLUMBEUS fAgassiz), 



Coiiesiusprosthemiiis, Jordan and Gilbert, 1882, 8, 219. 



Depth in length, four and one-half. The interorbital space flat; the profile straight 

 or slightly concave to the nostrils, then descending to the upper lip. Mouth rather small, 

 the maxillary not reaching the eye; slightly oblique; the lower jaw shorter than the upper. 

 Snout, three in head. Scales small, the formula 12-68-8. Olive above, pale and silvery be- 

 low. May attain a length of six inches. In the region of the Great Lakes. Has not been 

 taken in Indiana territory, but Dr. Jordan states that it occurs in Lake Michigan, and that 

 there are specimens of it in the National Museum from Evanston, 111. In such case we can 

 hardly doubt that it will eventually be found along the Indiana shore of Lake Michigan 

 and in the lakes of Northern Indiana. 



