ICHTHYOLOGY OF AUSTRALIA. 151 
the total length of the head. The operculum is much more 
rounded, and the second ridge of the prseoperculum is not 
hardly visible ; the greatest breadth of the head is contained 
once and two-thirds in its length ; the caudal is rather longer 
and more rounded. 
The height of the body is contained three times and two- 
thirds in the total length, or three times and one-third without 
the caudal ; this height is rather less than the height of the 
head. The upper profile is more convex than in the usual 
sort. 
The colour is of a livid grey, covered entirely with small 
round obscure spots. 
The fishmongers consider this fish as distinct, and give it 
the name of Murray Perch (not the Golden Perch, which is a 
Dules). 
The specimen is near thirty inches long, it was caught in 
the Murray in the beginning of April. 
Nota. — I find that the small spotted specimen I mentioned 
in the beginning of the present paper, belongs to this 
sort. 
MUGIL PERONII. 
Mugil Peronii, Guv. and Vol., vol. xi., p. 138. 
In the beginning of this century, the learned naturalists, 
Peron and LeSueur, who accompanied Captain Baudin in his 
exploration of Australia, found at Western Port a sort of 
Mugil, which does not appear to have been observed since, 
and to which Cuvier and Valenciennes gave the name of 
Peronii. 
A few days ago (5th March, 1873), my attention was called 
by a fishmonger to a Mullet, which seemed different to the 
Sand Mullet (M. Waigiensis), and on examining this fish, I 
soon found that it was the long forgotten Peron's sort ; having 
seen such large quantities of Mullets from Western Port, I had 
come to the conclusion that the locality mentioned by Cuvier 
and Valenciennes was a different one from the Bass's Straits 
Port, and I was confirmed in this opinion by the erroneous 
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