1817.] GENUS CATOSTOMUS. 109 



Head somewhat depressed and smooth. Eyes rather 

 small. Gill- openings rather narrow. Pectoral fins very- 

 far forward on the neck. Back arched, and approaching 

 to gibbous. Body thick, but may be rather termed deep 

 than round. 



Back deep brown, inclining to black, w^ith whitish 

 scales. The lines between the scales, dark and decussat- 

 ing each other so as to leave rhombic spaces between 

 them. The lines are darker coloured than the spaces they 

 define. 



Belly a pale cream colour, with golden spots or tints, 

 particularly between the pectoral and ventral fins, andi 

 near the anal. 



Pectoral and ventral fins dusky, with a reddish tinge, 

 anal, caudal, and dorsal, dark brown. 



Lateral line obscure. Tail rather concave. 



P. 15.— V. 9.— D. 14.— A. 8.— C. 19 rays. 



Lives in fresh streams and lakts, like the Sucker. 



These two last descriptions are extracted from an ac- 

 count of the Fishes of Newyork, by Samuel L. Mitchill, 

 M. D., pubhshed in the Transactions of the Literary and 

 Philosophical Society of Newyork, 1815. 



17. C. sucetta, (Cyprinus sucetta. La Cepede.) 

 Head compressed and flat; the opening of the month semi- 

 circular; lower lip very thick, crenated, and curved out- 

 wardly; body and tail compressed; scales semirhomboidal; 

 irides yellow; Jins and back of a brown colour; sides sil- 

 very, with brown spots at the base of the scales. 



P. 13.— D. 12.— -V. 9.~A. 9.— C. 18 rays. 



In the introduction to this article, I asserted that the 

 C. catostomus is the only (certain) species of the kind 



