88 THE MAMMALS, REPTILES, AND FISHES OF ESSEX. 



Class PISCES. 



Sub-Class TELEOSTEI. 



Order I. ACANTHOPTERYGII. 



Family PERCID^E, Day. 

 Genus PERCA, Artedi. 



Perca fluviatilis, Rondeletius. PERCH. 



This well-known fish occurs in all parts of the county, our 

 sluggish streams apparently suiting its requirements. One 

 weighing four pounds is reported from Dagenham Lake (Field, 

 October 29th, 1881, p. 624). 



Genus LABRAX, Cuvier. 



Labrax lupus, Cuvier. BASS or BASSE. 



A fish taken occasionally in all our estuaries. Mr. E. A. 

 Fitch records (Essex Nat., vol. ii., p. 19) the capture of several 

 in the Blackwater. They are very good for the table. I 

 have seen some nearly twenty pounds in weight. 



Genus ACERINA, Cuvier. 



Acerina vulgaris, Cuvier. RUFF. 



In a paper on " Isaac Walton and the River Lea," by 

 Lieutenant R. B. Croft (Trans. Herts. Nat. Hist. Soc., 1881- 

 1883, vol. ii., p. 12), this species is given as an inhabitant of 

 that river. I know of no other Essex stream in which it 

 occurs; but Yarrell says (British Fishes, 1836, vol. i., p. 18) 

 that it is found in the Cam, which river rises in Essex. 



