SYNOPSIS 



OP THE 



FAMILIES, GENERA, AND SPECIES 



OP 



BRITISH FISHES. 



FIRST SERIES. OSSEOUS FISHES, OR SUCH AS 

 HAVE A BONY SKELETON. 



IRST SUBDIVISION. ACANTHOPTERYGII ; FISHES 

 WITH SOME OF THEIR FIN-RAYS SPINOUS. 



FAM. I. Perddcs. Fam. of Perches. Body oblong, covered 

 xrith large conspicuous scales, which are generally rough with, 

 sUiated margins; operculum and preoperculum denticulated or 

 ipinous; both jaws, vomer, and almost always the palatine bones. 



GEN. I. PERCA. Two dorsals, the first with spinous rays, 

 those of the second flexible ; preoperculum notched below, ser- 

 rated on the posterior edge, operculum terminating behind in a 

 flattened point ; tongue smooth ; branchiostegous rays seven ; 

 scales adherent. 



Sp. 1. P.fluviatilis. The Perch. Back dusky green, sides 

 with from 5 to 7 dusky bands ; abdomen white, tinged with 

 red ; dorsal and pectoral fins dusky, tinged with red ; ven- 

 trals scarlet, their position under the pectorals. Number 



