68 ICHTHYOLOGIA OHIENSIS 



diagonally, its base is scaly and such is also the base 

 of the anal fin, which has similar colours, and 15 

 rays, whereof three are spiny. Pectoral fins with 16 

 rays. Thoracic fins incarnate with six rays, whereof 

 one is spiny. 



[I. 371] [2j\ It will appear that this fish differs so 

 widely from the foregoing, as to be hardly reducible 

 to the same genus ; but its great similarity with the 

 Perca Mitchelli has compelled me to retain it in this 

 genus, notwithstanding many peculiar characters. 

 I shall however venture to propose a new subgenus 

 or section in the genus Perca for this fish, to which 

 the P. Mitchelli, may perhaps be found to belong. It 

 may be called Lepibema and distinguished by the 

 scaly bases of the caudal, anal, and second dorsal 

 fins, this last with some spiny rays, and all the three 

 parts of the gill cover more or less serrulate, besides 

 the small teeth. 



The Perca Salmonea may also form a peculiar sub- 

 genus, or section distinguished by the cylindrical 

 shape of the body, long head and jaws, large teeth, 

 and a second spine outside of the opercule over the 

 base of the pectoral fins. It may be called Stizoste- 

 dion, which means pungent throat. I could have 

 made peculiar genera of each of them, under the pro- 

 posed names ; but as they otherwise agree with the 

 reduced genus Perca, I have preferred delaying this 

 innovation until more species are found possessing 

 the same distinctions, in which case my two perches 

 may then be called Stizostedion salmoneum, and Lepibe- 

 ma chrysops. 



3d Species. Black dotted Perch. Perca nigro- 

 punctata. Perche a-points-noirs. 



Upper jaw longer; body brown, covered all over 



