Clafs IV; Ri FOPEy ABS 215 
nie het OR ee oe 
Cernua, Belon. 186. Perca cernua. P. pinnis dorfa- 
Perce fluviatilis genus minus. libus unitis radiis 27. fpinis 
Gefner pijce 701. 15. cauda bifida. L7x. jy. 
Afpredo Cait opufe. 107. 487. Gronov. Zooph. No. 
Ein ftuer, ftuerbarfs, Schone- oe cee ie Faun. fuec. 
velde. 56. 
Cernua fluviatilis. Wil. Icth. schrcll, (Bisenlaee, Schaef. 
334- pile. 37. tab. i. Wulff Borufis 
Rufte. Raii /yn. pile. 143. No. 356 
Perca dorfo monopterygio, ca- 
pite cavernofo. Arted. /yn. 68. 
HIS fith is found in feveral of the Engli& 
_ ftreams: it is gregarious, affembling in large 
fhoals, and keeping in the deepeft part of the water. 
It is of a much more flender form than the 
perch, and feldom exceeds fix inches in length. 
The teeth are very {mall, and difpofed in rows. 
It has only one dorfal fin extending along the 
ereateft part of the back: the firft rays like thofe 
of the perch are ftrong, fharp, and fpiny; thé 
others fort. 
The pectoral fins confit of fifteen rays; the 
ventral of fix; the anal of eight; the two firft 
_ftrone and fpiny: the tail a little bifurcated. 
The body is covered with rough compact {cales. 
The back and fides are of a dirty green, the laft 
inclining to yellow, but both {potted with black. 
The dorfal fin is fpotted with black: the tail . 
marked with tranfverfe bars: 
, TV. The 
