F18HES INTRODUCED 



EUROPEAN SETTLERS 



Order L— ACANTHOPTERYGIT. 



PERCID^. 



For cliaractei'S see (ude, p. 1. 



Perca. 



All the teeth villiform, without canines ; teeth on the palatine 

 bones; tongue smooth j two dorsals; anal with two spines; operculum 

 spiniferous ; jiraaoperculum and prseorbital serrated ; scales small, 

 ctenoid ; head naked above ; seven branch iostegals. 



1. PBECA FLUVIATILIS. L. 



Perch, 



P, Jluviatilis, Giinth., I., 58, 



Total length equal to three and three-fourths the height of the body ; 

 inferior edge of the operculum entire, or very weakly denticulated ; 

 inferior edge of prseoperculum -svith a few strong spinous teeth, directed 

 forwards ; operculum smooth ; more than seventy transverse rows of 

 scales ; transverse line ^ . 



A large black mark on the posterior part of the first dorsal fin 

 (Giinth,) 



Canterbury, Otago, Nelson, Wellington. Tntrodticed from Tasmania ; 

 originally from England. 



