PERCA. PERCH. 



Generic Character. 



Denies acuti, incurvi. 

 Opercula triphylla, squa- 



mosa, serrata. 

 Pinna dorsalis antice spi- 



nosa. 



Squama (pluribus) durae, 

 aspera. 



Teeth sharp, incur vate. 



Gill-covers triphyllous, 

 scaly, serrated. 



Dorsal Jin spiny on the fore- 

 part. 



Scales (in most species) hard 

 arid rough. 



COMMON PERCH. 



Perca Fluviatilis. P. olivacea, fasciis utr'mque transversis semi- 

 decurrentibus subnigris, pinna dorsali svbviolacea, catteris rubris. 



Olivaceous Perch, with transverse semidecurrent blackish 

 bands, dorsal fin subviolaceous, the rest red. 



Perca fluviatilis. Lin. Block, fyc. 



TH 



E Perch is an inhabitant of clear rivers and 

 lakes throughout almost all parts of Europe, arriving 

 sometimes to a very large size, and to the weight 

 of eight, nine, or ten pounds : its general size how- 

 ever is far smaller, usually measuring from ten or 

 fifteen inches to two feet in length, and weighing 

 from two to four pounds. The colour of the Perch 

 is brownish olive, sometimes accompanied by a 

 slight gilded tinge on the sides, and commonly 

 marked by five or six moderately broad, blackish, 

 transverse, semidecurrent bars : the dorsal fin is of a 

 v. iv. P. n. 35 



