100 PISCES. 



Two species inhabit the fresh waters of Europe; their flesh is 

 light and agreeable. 



Aspro vulgaris^ Cuv.; Perca asper, L.; Bl. 107, 1 and 2; Cuv. 

 and Val. II, xxvi. From the Rhone and its tributaries; green- 

 ish; three or four blackish vertical bandsj eight spines in the 

 first dorsal. 



A. Zingel; Perca Zingel^ L.; Bl. 105. From the Danube; 

 larger than the vulgaris, but similar as to colours; thirteen 

 spines in the first dorsal. 

 This division also comprises some fishes whose singularity of 

 conformation gives rise to several subgenera. 



HuRO, Cuv. and Val. 



All the characters of a true Perch, except that the preoperculum 

 is not dentated.(l) 



Etelis, Cuv. and Val. 



All the characters of a true Perch; hooked teeth in the jaws, but 

 not as in the Lucio-Perca, in the palate,(2) 



NiPHON, Cuv. and Val. 



Teeth as in the Perch, and strong spines at the lower part of the 

 preoperculum, and on the operculum.(3) 



Enoplosus, Lacep. 



Characters of the Perches; angle of the preoperculum more deeply 

 dentate; the body much compressed, and together with the two 

 dorsals, of great vertical height. (4) 



DiPLOPRiON, Kuhl and Van Hassel. 



All the characters of a Perch; body compressed; a double den- 

 tated border on the lower part of the preoperculum, and two spines 

 on the operculum. (5) 



ApogoNj Lacep. 



Body short, furnished, as well as the opercula, with large scales 

 that are easily dislodged; the two dorsals very separate, and a double 



(1) Huro nigricans, Cuv. and Val., II, pi. xvii. 



(2) Etelis carbunculus, lb. pi. xviii. 



(3) Mphon spinosus, lb. XIX. 



(4) Enoplosus armatus, lb. XX, or Ch3etodo7i armalus, J. White. 



(5) Biploprion fasciatum, Cuv. and Val. II, xxi. 



