THE PERCH FAMILY. 



Ill 



CEAPPIE, SAC-A-LAI, OR CHINKAPIN PERCH. 

 Pomoxis hexacanihus: Cuvier. 



Form — body oval, much compressed ; breadth compared 

 with length as 8 to 7. Lateral line concurrent with the back. 

 Head small, facial line much depressed; small scales on 

 preopercle, but larger on the opercle, which is without a 

 spine ; nostrils small and double ; a few denticulations at the 

 lower posterior angle of opercle ;. branchial rajs seven ; dorsal 

 fin seven spines and sixteen soft rays; pectorals twelve; 

 ventrals one spine and five rays ; anal large, with six spines 

 and eighteen rays ; caudal eighteen rays. 



There are five indistinct dark lines above the lateral line 

 in the fish of Louisiana, but wanting in those of Illinois ; I 

 have found dark transverse markings on the latter. The back 

 is yellowish blue ; sides silvery ; belly white, tinged with 

 yellow. The pectorals camate nearest the humeral bone, with 

 a light shade of orange at the tips ; ventrals pink, tipped with 



