364 DESCRIPTIVE CATALOGUE OF ArSTRALIAN FSIHES, 



The heiglit of the body is thrice and two-thirds in the total 

 length ; the length of the head is four times and one-third ; snout 

 moderately pointed, prfeoperculum serrated behind and below, 

 the angle scaleless ; j)i'^orbital serrated ; two opercular spines, 

 the lower is the broader and longer. Dorsal fin nearly even ; 

 caudal fin emarginate. The colour is silvery, with occasional 

 black spots, a longitudinal band of the same colour below the 

 eye ; caudal, anal, and dorsal fins spotted. Pectoral with obscure 

 transverse lines. The form is more elongate than in Therapon 

 Richardsonii, with the back less convex and the head more so. 



Eivers of Western Australia. 



138. Therapon Eichardsoxii, Casteln. 



Proc. Zool. Soc, Victoria, Vol. I., p. 60. 



" Silver Perch " of the Colonists, " Xoolerry " of the Murrum- 

 bidgee natives. 



D. 12/11-12. A. 3/8. 0.17. P. 16. L. lat. 65. L.tr. 17-25. 



Height of body three times and eight-tenths in the total length, 

 head four times and two-thirds in the same ; the eye four times 

 and one-seventh in the length of the head. The upper profile of 

 the body strongly and equally convex, the lower almost straight ; 

 prfeorbital very strongly serrated ; prfeoperculum rounded with 

 long spines behind and shorter ones below ; coracoid strongly 

 serrated ; operculum with two spines, the inferior strongest ; 

 dorsal fin received into a groove, the fifth spine the longest ; anal 

 spines very strong, the second most so. Caudal fin slightly 

 emarginate. Colour greyish-blue, beneath whitish, sides shaded 

 with yellow, each scale bordered with black ; lips rosy ; eye 

 yellow ; soft dorsal fin black on the upper part ; ventrals white 

 with the rays rosy ; pectorals black on terminal half. 



Found in all the rivers of the Murray system. 



