1818.] DESCRIPTION, Sec. 417 



are of a bright colour, so as to contrast strongly with that 

 of the general surface, giving to ihe body a very striking- 

 ly harnessed appearance. It resembles E. lucius in the 

 form of the head. 



JDescription of three 7iew genera of Jluviatile Fish, Po- 

 Moxis, Sarchirus and Kxoglossum, By C. S, 

 Rufinesque, Read December \st and 8th. . 



Genus POMOXIS. 



Thoracic. Natural Family of Sparides, 



Body elliptic, compressed, scaly, vent nearer to the 

 head than to the tail. Head scaleless, jaws plaited, ex- 

 tensible, roughened by very minute teeth. Gill cover 

 smooth, inerme, unserrate, nearly double, impressed by an 

 angular and transversal depression, membranaceous and 

 acute posteriorly. Thoracic fins with one spiny ray and 

 no appendage. One dorsal fin opposed to the anal fin, 

 both with many spiny rays. 



Pomoxis Annularis. Annular Pomoxis. PI. 17, fig. 1. 



Silvery, back olivaceous, with some geminate brown 

 transversal lines; a golden ring at the base of the tail; 

 lateral line straight; dorsal and anal fins with six spiny 

 rays shorter than the others, a blackish spot behind both 

 fins; tail forked, blackish at the end; lower jaw longer. 



The vulgar names of this fish are S her -perch and 

 Gold^ring, I found it in the river Ohio at tlie fails, in 



