68 



fin. The name means Tail over the back. The Silurua gyri- 

 tius of Mitchell must belong to this genus. 



81st Species. Ykj.j.ow Backtaii.. JYoturua jlavu*. No- 

 ture jaune. 



Eutirely yellowish. Upper jaw longer, barbs half the length 

 ofthe head. Eyes round. Lateral line nearly straight; Anal 

 fin -with 14 rays. Tail entire truncate. 



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

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

 J-.r.Liuru* among the Catfihes. Vulgar name Yellow" CatBsh, 

 like the Pimelodus cu/ireus. Dorsal fin]] with 1 and 7 rays, 

 rounded spine very short and obtuse. Second dorsal beginning 

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

 lower fins rounded. Pectorals with 1 and 7 rays, spine equal 

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

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

 part of the body compressed. 



XXV Genus. Toter. Hypentelicm. Hypcntele. 

 Body pyramidal slightly compressed, with very minute scales- 

 Vent posterior. Head scaleless nearly square, mouth terminal 

 protruded beneath toothless, lower jaw shorter with fiv e lobe s, 

 the middle one larger, lips very small. Abdominal fins aT 

 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 Ezoglossum, with which I had united it} but this 

 last differs irom it by an oblong body, flat head, lower ifptri. 

 lobe not protruded, abdominal fins and dorsal fin medial, £<c 

 The name expresses the character o£ the lower lip. 



82d Species. Ohio Toter. Hy/ienteliuin macrpptcrum. 

 Hypentelc macroptere. 



Forehead sloping truncate, tuberculatcd. Body silvere'ctj Va- 

 riegated, and reticulated with blackish, lateral line straight and 

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

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

 fiirwgh 12 rays, tail forked. 



^.JExaglostum macvojitcrum. Raf. in Journal Acad. Nat. Sc. 

 of PJulad.-VoLX, page 320. tab, 17 fig. 4, - 



