40 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY 1. 



• 77th species, Black Catfish, PIMELODUS MELAS, Pimelods noir. (p. 66.) 



Amiukus MELAS (Eaf.) Jordan. 



Amiurus obesus Gill. 



t 7Sth species, Yellow-Head Catfish, PIMELODUS XANTHOCEPHA.LUS, 

 Pimelode zanthocephale. (p. 66,) 



Amiurus xanthocephalus (Raf.) Gill, 



4th section, ILICTIS. (p. 66.) 



Tail entire, eyes elliptical. Nine abdominal rays. Dorsal fins sub- 

 medial. Pectoral fins with one flat spine serrated outwards and nine 

 rays. Lower jaw longer. 



79th species, Mud-Catfish, PIMELODUS LIMOSU3, Pimeloda bourbeus. 

 (p. 66.) 



Pelodichthys olivaris (Raf.) Gill & Jor. 



JXXIIL Genus, MUDCAT, PILODICTIS, Pylodicte. (p. 67.) 



Pylodictis Raf., 1819. 

 Opladelus Raf., 1820. 

 Hopladelus Gill, 1861. 

 i*ELODiOHTHYS Gill & Jordan, 1877. 



* Jaws Dearly equal. Eyes round. Barbs unequal, shorter than the head. Body 

 entirely black, lateral line straight. Anal fin with 20 rays. Tail nearly truncate, 

 entire. 



Sihirus melas, Monogr. sp. 8. 



A rare species less than a foot long. Hardly pale beneath. Dorsal fin 1 and 7. 

 Found below the falls. 



t Upper jaw longer. Barbs unequal, shorter than the head, Eyes round. Body iron 

 gray, with the whole or part of the head yellow. Belly white. Lateral line straight. 

 Aual fin with 22 rays. Tail entirely truncate. 

 Silurus xanthocephalus, Monogr. sp. 10. 



About a foot long. In the Ohio, Kentucky, etc. Head very large, often entirely 

 yellow, or only forward, or covered with yellow patches. Iris white. Fins fleshy 

 reddish. The dorsal with 1 and 6 rays, caudal 24. Good food. 



t Body scaleless, conical, flattened forwards and compressed behind. Head very 

 broad and flat, with barbs, eyes above the head. Two dorsal fins, both with soft rays. 

 Vent posterior. 



This genus was the 10th of my Prod, of 70 N. G. of animals. The name means 

 Mudfish. It differs principally from the foregoing by the second dorsal having rays. 



