202 REPORT OF STATE GEOLOGIST. 



HyBOGNATHUS NUCHALI8 Ag. 



Jordan and Gilbert, 1882, 8, 156 (in part). 



Body rather slender and somewhat compressed. Depth in length 

 four and one-half. Head in length four and one-half to five. Mouth 

 small, oblique, the maxillary reaching to a perpendicular from the front 

 of the eye. Snout moderate and rather blunt. Anterior suborbital 

 bone about one-half as wide as long. Eye three and one-half to five in 

 head. Dorsal 8; anal 8. Scales 6-40-5; the lateral line complete. 

 Color greenish, overlaid by silvery ; a dusky band along the back, and 

 often a leaden band along the side. Length four to nine inches. New 

 Jersey to Dakota and Texas. Indiana localities are : Carroll County 

 {23, '88, 46); Franklin County (23, '88, 57); Monroe County (i, '85*, 

 410); Marion County (i, '77, 376); Lower Wabash River {1, '77, 45); 

 Parke County U, '88, 102); New Harmony (^, '88, 162); Evansville 

 (4, '88, 165); Vigo County [l6, 94); Logansport {J^, '94, 36); Lafayette 

 {18, 381). 



Prof. Forbes found the alimentary canal of this species full of sand 

 and an immense number of diatoms, together with some low forms of 

 vegetable matter.* 



Genus PIMEPHALES Raf. 



Teeth 4-4, scarcely hooked, furnished with a grinding surface. Ali- 

 mentary canal more than twace the length of the body. Scales in 

 front of the dorsal small, more than twenty in number. Dorsal over 

 ventrals. 



Lateral line incomplete or wanting. promelas, p. 202. 



Lateral line complete. notatus, p. 203. 



PiMEPHALES PROMELAS Raf 



Fat-head ; Black headed Minnoiv. 



Jordan and Gilbert, 1882, 8, 158; Blatchley, 1885, 1, 63. 



Body quite short and deep, little compressed. Depth in length about 

 four times. Head short; its length in that of head and body, four. 

 Snout blunt. Mouth inferior, horizontal, small. Upper lip protractile. 

 Dorsal, seven ; anal, seven. Lateral line incomplete or wholly want- 

 ing. Scales, 7-47-6; about twenty seven in front of the dorsal. Color, 



•HYBOGNATHUS NUBIL A (Forbes). 



Cliola Hubila, Jordan and Gilbert, 1882, S, 167. 



This species, which has been found from Northern Illinois to Western Arkansas, differs 

 from H. nuehalis in having very narrow suborbitals and in being Qf a darker color. The 

 scales are dark edged above. There is a more or less distinct dusky dorsal line. The sides 

 are silvery, lyith a dusky band; sometimes nearly black. This follows the lateral line, and 

 passes around the snout. This species may occur in Indiana. 



