BY W. MACLEAY, F.L.S. 305 



operculum elevated into a sharp ridge. Dorsal fins continuous, 

 tlie fourth spine the longest ; third anal spine a little longer 

 than the second ; caudal slightly emarginate. Lateral line slightly 

 curved, and occupying 51 scales. Colour silvery, darker on the 

 back. 



The continuity of the dorsal fins ought to remove this species 

 from this genus. It is found in all the Eastern rivers of New 

 South Wales, and in some of those of Victoria, and attains a 

 considerable size. 



3. Lates similis, Casteln. 

 Proc. Zool. Soc, Victoria, Vol. I., p. 44. 

 This species differs from Z. colonorum in having tlie snout 

 shorter, and less than the diameter of the eye, the denticulations 

 of the preeoperculum are larger, and those of the lower limb are 

 directed backwards. The second dorsal has only nine rays. Found 

 in the Gippsland Lakes. 



4. Lates axtarcticus, Casteln. 



Proc. Zool. Soc, Victoria, Vol. I., p. 44. 



Sea Perch of the Melbourne Market. 



This species, which I have never seen, seems to differ from L. 



colonorum in being of a higher form, in having the pr^eorbital 



more finely serrated, and the praeoperculum more strongly toothed 



on the posterior edge. The colour is silvery with the back and 



upper parts of the head of a dark blue ; dorsal and caudal fins 



blackish ; ventrals and pectorals of a dark greenish-gray, anal 



of a light grey. 



This Fish is occasionally seen in the Melbourne Market and is 

 esteemed for food. 



5. Lates Victoria, Casteln. 

 Proc. Zool. Soc. Victoria, Vol. I., p. 45. 

 This species differs from the last in having the second spine of 

 the operculum composed of a bunch of four spines, of wliidi the 



