82 ICHTHYOLOGIA OHIENSIS 



Pectoral broad 12 rays. Tail 16. Branchial rays 5. 

 A faint and narrow marginal black spot on the oper- 

 cule beneath the spines. 



VI Genus. Pomoxis. Pomoxis. Pomoxe. 



Body elliptic, compressed, scaly. Vent anterior. 

 Head scaleless, jaws plaited extensible, roughened by 

 very minute teeth. Gill cover smooth, scaleless, pro- 

 percule forked beneath, opercule membranaceous and 

 acute posteriorly. Thoracic fins without appendage, 

 but a spiny ray. One dorsal fin opposite to the anal, 

 both with many spiny rays. 



A very remarkable genus by the anterior vent, 

 equal anal and dorsal fin, by which it differs from 

 the genus Spams, besides the want of appendage, 

 &c. The name means acute opercule. 



1 8th species. Gold-ring Pomoxis. Pomoxis 

 annularis. Pomoxe annulaire. 



Synonymy. Pomoxis annularis. Journal of the 

 Acad, of Nat. Science of Philadelphia, vol. i, p. 417, 

 tab. 17, fig. I. 



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, a marginal black spot behind 

 both fins : tail forked : lower jaw longer. 



Vulgar names Gold-ring and Silver-perch. Found 

 in August at the falls, probably permanent. Length 

 from three to [II. 54] [j^] six inches. Good to eat. 

 Eyes black, iris silvery. Diameter three tenths of 

 the length. Head gilt above. Pectoral fins reaching 

 the vent. Scales deciduous and a little ciliated. End 

 of the tail blackish. Spiny rays of the anal and 

 dorsal fins gradually longer, but shorter than the soft 



