324 FISHES. 



lateral line, and but an eighth or tenth further from the 

 dorsal line than the ventral; greatest depth midway of 

 body over ventrals and just in advance of dorsal; depth 

 3^ in length; head strongly transversely convex, almost 

 rid^j-ed above, less narrowed downwards than in huba- 

 lus; greatest depth of head 1^ in its length; interor- 

 bital space 2J; eye=snout 5|- in head, much smaller 

 than in huhalus ; snout scarcely projecting; no depres- 

 sion at occiput; an almost even curve from snout to 

 dorsal; head bounded by curves, therefore not trian- 

 o-ular, thicker, larger, and less pointed than in huhalus ', 

 mouth large, with a large and pappillose lower lip; man- 

 dible longer than eye; scales 8 — 41 — 7; fin rays D. I, 

 30; xV. I, 11; dorsal not so high nor so rapidly depressed 

 as in buhalus^ the longest ray scarcely half the length 

 of the base of the fin, reaching to the 15th, the 9th ray, 

 half the height of the first; anal reaching caudal, its 

 middle rays more rounded, not so much shorter than tlie 

 first; pectorals as long as ventrals, both longer than anal 

 and less than head; colors very dark; fins all black. 

 Mississippi and Ohio Rivers. 



2. B. alius, Nelson. Deep-Bodied Buffalo. Body 

 very deep and much compressed; the back is much 

 arched and the profile descends steeply in front to end 

 of snout, not forming an angle with it as in many 

 speGiea of Ickthi/obus; depth of body 2^ in length; head 

 4 in length; greatest thickness of body 1| in length of 

 head; depth of head Vg in its length; width 1^ in 

 length; eye 5^ in head, 2|- in interorbital space, which is 

 but little rounded; lateral line perfectly straight from 

 upper edge of opercle to caudal; scales 8 — 35 — 5; dor- 

 sal I. 25; A. 1, 0; cc^lor in spirits, dull yellowish-olive; 

 fins dusky. Illinois. (J^elsou. Same as the next!) 



