82 



zoulal, the dorsal and anal somewhat falcated and move distant 

 from the tail than usual. Lateral scales dimidiated. 



XXXII Genus. Double fin. Dinectus. Dinecte. 

 Differs from Sturgeon, by having two dorsal and no abdom- 

 inal fins. First dorsal anterior, the second opposed to the anak 

 Three rows of scales as in Stcrtctus. 



This genus rests altogether upon the authority of Mr. Audu- 

 lion, who has presented me a drawing of the only species be- 

 longing to it. It appears very distinct if his drawing be cor- 

 rect; but it require* to be examined again. Is it only a Stur- 

 geon incorrectly drawn? 



101st Species. Flatnose Doublefin. Dinectus truncattts. 

 Dinecte camus. ■■■■»■■ » 



Head one fifth of total length, conical, snout very short trun- 

 cated, eyes round. Body cylindrical deep brown above, silve- 

 jy white beneath, tail elongated: dorsal scales, 4 before the first 

 dorsal fin, 6 between the fins, and 4 behind the second, lateral 

 rows with about SO small dimidiated scales. 



This fish was taken with the seine near Ilcnucrsonville in 

 the spring of 1818 by Mr. Audubon. Length two feet, skin 

 very tTTTcTTiTrrrt leathery. Mouth very large and hanging down 

 as in the foregoing, somewhat like a rmTtTtrgrrs. Pec to ral ttml 

 anal fins trapezoidal, dorsal fins nearly triangular, tiie first larg- 

 er and standing immediately behind the pectoral. Gill cover 

 rounded. Tail somewhat forked, the upper lobe thrice as long 

 as the lower. Four long white barbs, very near the end of the 

 snout, eyes above the mouth. 



XXXIII Genus. Sr-ADEFisH. Polyodon. Polyodon. 

 Differs from Sturgeon, by having a transversal mouth with 



teeth, no barbs and no scales. . Snout protruded in a long flat 

 process, gill cover elongated by amembraceoua appendage. 



This singular genus was first described by Laccpede. It be- 

 longs to the family of Sturic?iia, along with the two foregoing 

 and the following*. Only one species is known as yet. 



102d Species. Western- Spadefisii. Polyodon folium. 

 Polyodon feuille. 



Head longer than the body, snout as long as the head, cunei- 



