124 ICHTHYOLOGIA OH I EN SIS 



A very singular and rare species, found at the 

 falls. Length only 4 inches, brown with bluish and 

 greyish shades, covered with a clammy viscosity; 

 throat whitish. Head very flat, with a longitudinal 

 furrow above, elongated; upper jaw hardly longer. 

 Eyes over the head very small and bluish. Spines 

 of the anterior fins short, thick, and simple. Dorsal 

 with 1 and 7 rays. Abdominal small with 9. Anal 

 blackish. 



75th [i.e., 74th J Species. Clouded Catfish. 

 Pimelodus nebulosus. Pimelode nebuleux. 



Jaws equal, barbs shorter than the head. Eyes 

 round, exceedingly small. Body olivaceous, clouded 

 with pale brown, [II. 359] white beneath, lateral line 

 nearly straight. Pectoral fins with 1 and 9 rays, 

 anal fin rounded with 12 rays. Tail merely notched, 

 hardly but equally bilobed. 



Silurus nebulosus. Monogr. sp. 5. 



This species is totally different from the foregoing, 

 and might perhaps form a peculiar section or even 

 subgenus, (O- [(55] pladelus) by the conical head, mem- 

 branaceous operculum ; but particularly because the 

 first ray of all the fins, except the caudal and adipose, 

 is a kind of soft obtuse spine concealed under the 

 fleshy cover of the fins. It is a large fish, from two 

 to four feet long, and commonly called Yellow Cat, 

 Mud Cat, and Brown Cat ; but these names are com- 

 mon to other species. It is very good to eat, either 

 boiled or fried. Head conical depressed, iris redish 

 brown, eyes black, lateral barbs white, the lateral 

 ones brownish. Operculum with a large membrana- 

 ceous appendage or flap. Body conical tapering 

 behind. Dorsal fins with 1 and 6 rays. All the fins 



