68 



fin. The name means Tail over the back. The Silurus gyrl- 

 ■nus of Mitchell must belong to this genus. 



81st Species. Yellow Backtail. JVotums favus, No- 

 ture jaune. 



Entirely yellowish. Upper jaw longer, barbs half the length 

 of the head. Eyes round. Lateral line nearly straight. Anal 

 fin with 14 rays. Tail entire truncate. 



A small species very common near the falls. Length 4 to 

 12 inches. It agrees in almost every thing with the Section 

 jfmeiurus among the Catfihes, Vulgar name Yellow Catfish, 

 like the Piinelodus cufircus. Dorsal fin^ with 1 and 7 rays, 

 rounded spine very short and obtuse. Second dorsal beginning 

 befbre the anal and extending to the tail in a curve. All the 

 lower fins rounded. Pectorals with I and. 7 rays, spine equal 

 and acute. Abdominal fins with 8 rays. All the fins fleshy 

 and fat. Head flat above, barbs unequal. lielly convex. Hind 

 part of the body compressed. 



XXV Genus. Toteu. Hypentelium. Hypentele. 

 Body pyramidal slightly compressed, with very minute scales* 

 Vent posterior. Head scaleless nearly square, mouth terminal 

 protruded beneath toothless, lower jaw shorter with five lobes, 

 the middle one larger, lips very small. Abdominal fins anteri- 

 or, removed from the vent, with nine rays, dorsal fin anterior 



opposed to them. 



This genus belongs to the family of Cyprinidia, and is next 

 to my genus Exoglossum, with which I had united it; but this 

 last differs Irom it by an oblong body, flat head, lower lip trl- 

 lobe not protruded, abdominal fins and dorsal fin medial. Sec- 

 'The name expresses the character of the lower lip. 



82d Species. Ohio Toter. HyliGntdium macropterunu 

 Hypentele raacroptere. 



Eorehead sloping truncate tuberculated. Body silvered, va- 

 Viegated, and reticulated with blackish, lateral line straight and 

 faint. Ail the lower fins elongated, the pectorals reaching the 

 abdominals, the anal with 10 rays and reaching the tail, dorsal 

 fin with 12 rays, tail forked. 



Exoglossujn macropterum. Haf. in Journal Acad. Nat. Sc 

 #f Philad. Vol. I, pjrge''S20. tab. 17 fig, 4. 



