154 Storer's Synopsis of the Fishes of North America. 



Ohio River and tributaries, Raf. 



The " Small Black Bull-head " of the northern streams and lakes. 



Pimelodus xanthocephalus, Yellow-head Cat-fish, Raf., Ichth. Ohien.. p. 66. 



" # Kirtland's Report, pp. 169, 194. 

 " Dekay's Report, p. Ib7. 



GENUS V. NOTURUS, Raf. 

 Adipose dorsal fin very long, decurrent, and united with the tail, which is 

 decurrent on each side, but unconnected with the anal fin. It differs from the 

 genus Plotosus of Lacepede by having the anal fin free, and from Pimelo- 

 dus by the connection of the tail with the second dorsal fin. 



1. Noturus flavus, Raf. 



Back and head yellowish olive ; sides yellow ; nose, throat, and abdomen, white. Fins 

 diaphanous, slightly dusky- Maxillary barbels not as long as the head. Rudiments of an 

 immature adipose fin. Anal elongate, widened behind. 



D. 1-7. P. 1-7. V. 8. A. 1-7. C. (?). Length, 4 to 12 inches. 



Ohio, Mahoning River, and Lake Erie, Raf., Kirtxand- 



Noturus flavus, Yellow Back-tail, Raf., Ichth. Ohien., p 63. 



" Kirtland's Report on the Zob'l. of Ohio, pp. 169, 195. 

 Pimelodus flavus, Young Cat-fish, with the rudiments of an adipose fin, Dekay's Report, p. 187. 

 Noturus flavus, Raf., Kirtland's Manuscript for publication in the Bost. Journ. Nat. Hist. 



Dr. Kirtland considers this a full grown species, and distinct ; and has, therefore, adopted 



Rafinesque's genus. 



FAMILY XVI. CYPRINID7E. 



Mouth but slightly cleft ; weak jaws, most frequently without teeth, and 

 the edge of which is formed by the intermaxillaries ; pharyngeals strongly den- 

 tated. Branchial rays not very numerous. Body scaly. One dorsal fin. 

 No adipose dorsal. Their stomach has no cul-de-sac, nor their pylorus any 

 coecal appendages. They are the least carnivorous of all fishes. 



GENUS I. CYPRINUS, Lin. 



Body covered with large scales ; a single elongated dorsal fin ; lips fleshy ; 

 mouth small ; teeth in the pharynx, but none on the jaws ; branchial rays, 

 three. 



