Class IV. 



R U 



V E. 



«5 9 



Cernua. Be/on, 186. 



Percae fluviatilis genus minus. 



Gefner pifc. 701. 

 Afpredo. Caii opufc. 107. 

 Ein ftuer, ftuer barfs. S clone- 



<velde, 56. 

 Cernua fluviatilis. Wil. Icth. 



334- 

 Ruire. Rail fin. pifc. 143. 

 Perca dorfo monopterygio, ca- 



pitecavernofo. Arted.fyn.6%. 



Perca cernua. P. pinnis dor- 



falibus unitis radiis 27. 



ipinis 15. cauda bifida. 



L ;n - fyft' 48^. Grono-v. 



Zooph. No. 

 Giers, Snorgers. Faun. Suec, 



No. 119. 

 Schroll, PfafFenlaus. Scbaeff. 



pifc. 37. Tab. II. Wulff 



Borufs. No. 35. 



127. 



Ruffe, 



^TpHIS fifh is found in feveral of the Englijh 



ftreams : it is gregarious, aflembling in large 



ihoals, and keeping in the deepeft part of the water. 



It is of a much more (lender form than the perch, 

 and feldom exceeds fix inches in length. 



The teeth are very fmall, and dilpofed in rows. 



It has only one dorfal fin extending along the 

 greateft part of the back : the firft rays, like thofe 

 of the perch, are ftrong, iharp, and fpiny, the 

 others foft. 



The pectoral fins confift of fifteen rays ; the 

 ventral of fix ; the anal of eight ; the two firft 

 ftrong and fpiny : the tail a little bifurcated. 



The body is covered with rough compact fcales. 



The back and fides are of a dirty green, the 

 laft inclining to yellow, but both fpotted with 

 black. 



The dorfal fin is fpotted with black : the tail 

 marked with tranfverfe bars. 



S3 The 



