SYNOPSIS 



OF THE 



FAMILIES, GENERA, AND SPECIES 



OF 



BRITISH FISHES. 



FIRST SERIES. OSSEOUS FISHES, OR SUCH AS 

 HAYE A BONY SKELETON. 



FIRST SUBDIVISION. ACANTHOPTERYGII ; FISHES 

 WITH SOME OF THEIR FIN-RAYS SPINOUS. 



Fam. I. PercidcB. Fam. of Perches. Body oblong, covered 

 with large conspicuous scales, which are generally rough loith 

 ciliated margins; operculum and preoperculum denticulated or 

 spinous; loth jaws, vomer, a/nd almost always the palatine hones, 

 provided with teeth. 



Gen. T. 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.fiuviatilis. 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 



