1817.] GENUS CATOSTOMUS. 103 



and dorsal Jin dashed with black. Length of specimen 

 described thirteen inches* 



p. 18.— D. 11.— V. 9.— A. 8.— C. 18 rays. 



I discovered this new species in Lake Lrie, where it 

 is known by the names of Black Sucker, and shoemaker, 



9. C. maculosus. Head large, quadrangular, decli- 

 vous; eyes small, roundish; the lateral line is straight, and 

 runs from the operculum in a line with the eye. 



The head in this species is more pointed, the anterior 

 part ofthe body thicker, the posterior part straiter, the tail 

 longer, the dor sal fin larger, and more elongated, than those 

 parts of the C, nigricans the caudal fin is also larger, but 

 the anal fin is shorter, than in the last; the scales are round- 

 ish; colour of the body reddish, with irregular blotches 

 of black; pectoral and ventral fins reddish, dashed with 

 black; anal fin and caudal fin reddish white; dorsal fin blu* 

 ish, with bkck marks on the rays. Length of specimen 

 eight inches. 



P. 16.— D. 12.— V. 9.— A. 9.— C. 18 rays. 



This fish is likewise called Black Sucker. I disco- 

 vered it in Pipe- Creek, Maryland. Perhaps it may be 

 only a variety of the C nigricans; but as there is a con- 

 siderable difference observable between them, 1 have ven- 

 tured to arrange it as a distinct species. 



10. C. elongatus. Body subcylindric, very long; 

 dorsal fin very long, low, its anterior part high, and falci- 

 form. 



Head very small, cuneiform above, breadth between 

 the eyes one inch and a half; snout strait, round, and fur- 

 nished, as are likewise tlie opercular with small tubercles; 

 pectoral fins as long as the head, placed very low; abdo^ 



