236 ON THE DISTRIBUTION OF FRESH-WATER FISHES 



It is difficult to assign a name to this genus. Rafinesque proposes it upon untena- 

 ble characters, and includes with it species of Moxostoma and Catastomus. Agassiz 

 purified it of these elements, but did not express its essential character, apparently 

 relying on the plicate lips. I have taken the older name, leaving for others the final 

 decision. 



Teretulus ceevinus Cope. 



This is the smallest species of the genus, if, as is probable, my specimens are adult. 

 The longest is 6 in 9 lin. in length. The colors are rich, but not showy. 



Form elongate slender, depth very little longer than length of head; "2 the length. 



Scales everywhere equal, 5 — 43 — 5, 15 anterior to dorsal fin. Head elongate, 

 depth at orbit -5 length, nearly equal parietal width. Eye five times in head (four 

 times in spec, of "4 in.), twice in interorbital width. Muzzle projecting beyond 

 mouth ; lips narrow, strongly plicate. Dorsal fin scarcely longer than high ; anal 

 reaching to basis of caudal; pectoral to below dorsal. Radii, D. i. 11. A. i. 7. V. 10. 

 P. 14. Caudal half length forked. 



Color: above brown, commissures of scales shaded dark chestnut, giving rise to 

 stripes to below the lateral line; belly yellow; fins shaded with red and yellow. 



Length of head 13'5 lin. ; to basis dorsal 32-6 lin. ; to basis anal 4 in. 4'5 lin. ; to 

 basis caudal 5 in. 7-75 lin. 



The young have a broad brown lateral band, which, as they grow older, breaks 

 into quadrate spots before disappearing. 



Abundant in the head-waters of the Roanoke and James Rivers, Va., preferring 

 rapids. 



Teretulus duquesnei Les. 

 CatosiomiiH Les. Ptijchostomus Agass. • 



Abundant, with fry in the Holstou River in the ninth month. 



CATOSTOMUS Leseur. 

 Agassiz. Decaciylus Raf. sp. Rylomyzon Agass. 



Catostomus nigricans Les. 

 Hi/lomyzon Agass., 1. c. 



In the characters of its mouth and natatory bladder this species is evidently a 

 Catostomus; it has, however, the nine rays of the Teretuli, instead often. I am not 

 disposed to attach much importance to this fact. 



Abundant in the Roanoke, Kanawha and Holston. 



Catostomus communis Les. 

 Abundant in the Roanoke, James, Kanawha and Holston, Also from the Miami, 

 Indiana. 



