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XXI Genus. Suckrel. CycleptCs. Cyclepte. 

 Difference from the foregoing genus — Two dorsal fins, mouth 



round and terminal. 



The name means small round mouth. 



6Sth Species. Black Suckrel. Cycle/ilus nigrescent, Cy- 

 clepte noiratre. 



Blackish, belly whitish, mouth recurved, tail forked. 



Cyclefitus. 17th G. of Prod. 70 N. G. American Animah. 



A singular and rare fish, which I have never seen, but men- 

 tion upon the authority of Mr. Bollman of Piitsburgh; where 

 it sometimes appears in the spring; but it is a rare fish, Kvhose 

 ifesh is very much esteemed. It is also found in the Missouri, 

 whence it is sometimes called the Missouri Sucker. Length 

 two feet. 



XXII Genus. Catfish. Pimelodus. Pimelode. 

 Body scaleless, elongated. Head large with barbs. Two 



dorsal fins, the second adipose and separated from the tail, the 

 first short and commonly armed. Pectoral fins commonly arm- 

 ed. Teeth like a file. Vent commonly posterior. 



'I'he extensive genus -SiVwrMs of Linneus, which is scattered 

 throughout the rivers of both continents, has not yet been com- 

 pletely illustrated, notwithstanding the labours of the modern 

 ichthyologists, I have found in the Ohio about twelve species 

 belonging to it: most of which offer consimilar characters and 

 appear to belong to the genus Pimelodus of Lacepede and Cu- 

 vier: which have left the name of Silarus to the species having 

 one dorsal fin. I have already published a monography of them 

 in the Journal of the Royal Institution of London, under the 

 generic m^me of Silurus. I nov/ propose to form with them a 

 peculiar subgenus^ divided in many sections, and different from 

 the subgenera Bagrus^ SynodoniusySilusox^ Sec. 

 Subgenns. Ictalurus. 



Plead depressed with eight barbs, one at each corner of the 

 mouth, longer than the others, four under the chin, and two on 

 the snout behind the nostrils. Teeth in two patches, acute and 

 file-shaped. Pectoral fins and first dorsal fin armed with an an- 

 terior spine. First dorsal trapezoidal and before the abdomi- 



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