148 ICHTHYOLOGIA OHIENSIS 



I have not seen this species, but Mr. Audubon 

 has communicated me a drawing of it. It is only 

 found in the lower parts of the Ohio, and reaches four 

 feet in length. Good food. Mouth large gaping, 

 hanging down, retractible. Gill cover oblong. 

 Tail slender, the lower lobe very small. Fins 

 trape- [<£?] zoidal, the dorsal and anal somewhat fal- 

 cated and more distant from the tail than usual. 

 Lateral scales dimidiated. 



XXXII Genus. Double fin. Dinectus. Dinecte. 



Differs from Sturgeon, by having two dorsal and 

 no abdominal fins. First dorsal anterior, the second 

 opposed to the anal. Three rows of scales as in 

 Sterletus. 



This genus rests altogether upon the authority of 

 Mr. Audubon, who has presented me a drawing of 

 the only species belonging to it. It appears very 

 distinct if his drawing be correct ; but it requires to 

 be examined again. Is it only a Sturgeon incor- 

 rectly drawn? 



101st Species. Flatnose Doublefin. Dinectus 

 truncatus. Dinecte camus. 



Head one fifth of total length, conical, snout very 

 short truncated, eyes round. Body cylindrical deep 

 brown above, silvery 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 30 small dimidiated scales. 



This fish was taken with the seine near Henderson- 

 ville in the spring of 18 18 by Mr. Audubon. Length 

 two feet, skin very thick and leathery. Mouth very 

 large and hanging down as in the foregoing, some- 

 what like a proboscis. Pectoral and anal fins 



