CLASS PISCES. 109 



Lucio-Perca, Cuv. -Pike-Perch. 



So named, because to the characters of the perch, 

 they join teeth which have some relation to those of 

 the pike. The edge of their preoperculum has merely 

 a simple indentation ; their dorsal fins are separated ; 

 some of their jaw and palatine teeth are long and 

 pointed . 



Luc. sandra, Cuv. Perca lucio-perca, Lin. Bl. pi. li. Cuv. 



and Val. ii. pi. xv. 



Is an excellent fish of the lakes and rivers of Ger- 

 many, and of Eastern Europe, longer than the perch, 

 greenish, with vertical brown bands ; it attains three 

 or four feet in length \ 



A second division includes the perco'ides, with seven 

 branchial rays, and a single dorsal fin. It may be 

 subdivided on principles nearly analogous to those 

 which form the basis of the subdivision of the pre- 

 ceding ; teeth either bent or altogether level, indenta- 

 tions or spines to the opercular pieces, &c. 



In the subdivision provided with hooked teeth, 



Serranus, Cuv. 



Have the preoperculum denticulated, and the bony 

 operculum terminated with one or two points. It is a 

 genus extremely numerous in species, and which may 

 be subdivided as follows : 



1 Add Perca volgensis, Gm. Luc.-Perc. Americana, Cuv. and 

 Val. ii. pi. xvi. p. 122. 



