(56 



convex above. Operculum fiexuosc. Tail with 24 rays. Dor- 

 sal wi'h one and 7. Spines short. 



rrth Species. Buck Catfish. Pimclodua melax. Pime- 

 jode noir. 



Jaws nearly cqnal. Eyes round. Barbs unequal, shorter 

 than IheJIiead. Body entirely black, lateral line straight. Anal 

 iin with 20 rays. Tail nearly truncate, entire. 



Silurus melas. Monogr. sp. 8, 



A rare species less than a foot long. Hardly pale beneath- 

 Dorsal fin 1 and 7* Found below, the falls. .^j. .....^ 



7.8th. Species. • Yellow head Catfish. Pimelodus xan*- 

 tfwcc/ihalua. Pimelode xanthocephalc. 



Upper jaw longer. Barbs unequal shorter than the head. 

 Eyes round. Body iron grey, with the whole or part of the 

 head yellow. Belly white. Lateral line straight. Anal fin 

 with 22 rays. Tail entirely truncate. 



Silurust xanthrocefihalua. Monogr. sp. 10. 



About a foot long. In the Ohio, Kentucky, &.c. . Head very 

 large, often entirely yellow,. or only forward, or covered with 

 yellow patches. Iris white* Fins fleshy redish. The dorsaA 

 with 1 and 6 rays, caudal 24. Good food. 



4th Section. Ilictis. Tail entire, eyes ellipticaL-^faitoe 

 abdominal rays. Dorsal litis submcdial. Pectoral fins with 

 one flat spine serrated outwards, and nine rays. Lower jaw 

 longer. 



79th Species. Mud Catfish. Pimelodua lintoaus* Pimer 

 lode bourbeux. 



Lower jaw longer. Barbs black, the lateral ones reaching 

 the pectoral fins. Body fulvous, variegated or clouded with 

 black, belly grey. No lateial line. Anal fin with 15 rays. 

 .Tail entire oval obtuse. 



Silurus Umosu8. Monog. sp. 11. 



A. very singular species, differing from all others by the long- 

 lower jaw, &c: Leugth about one foot. It has a slender body 

 of a rufous brown mixed with black. It is found in the muddy 

 streams, and near the muddy t banks of large rivers. Dorsal fin 

 opposite the abdominal, with one spine concealed under the skin 

 and six rays* Branchial membrane apparent outside. Pecto^ 



