254 On Australian Entomostracans. 
At Plate VI. (G.), I have figured the nerves of the eye 
and.of the black spot of this species. The black spot is 
very minute, and is placed on the thickened part of a small 
nerve situated between that supplying the superior antennze 
and the optic nerve. _ This latter is very largely developed, 
and consists of several ganglia, connected with the brain by 
a small nerve. 
The black spot is always in the Daphniade connected 
with the brain, and appears to me to represent the central 
eye of the young Phyllopoda. I hope to return to this 
subject when I come to describe the Australian members 
of the last-named family. 
D. carinata. var. cephalata. (Plate VI. B.)—I have 
met with this singular variety only twice :—At Campbell 
Town (several specimens); at Denham Court (a single 
specimen.) 
D. Elizabethe. var. acuti-rostrata. (Plate VI. C.)— 
I have been almost inclined to suspect that the differ- 
ences between this variety and the normal state would 
indicate a difference of species. But I have never found 
any young specimens with the sharply-beaked head: 
nor have I ever found the: variety but in company with 
D. Elizabethe. The top of the head is produced into a 
sharp point: the dorsal margin is much produced. It 
attains a large size, and is of a ereenish colour. 
Habitat.—Denham Court: in ponds. 
D. honorata. (Plate VI. D.)—The male (which I 
have figured, having met with it lately), is but a little 
less ventricose than the female. The superior antennz 
are large. 
Habitat.—Besides occurring in the locality previously 
mentioned, this species is found at Parramatta, and in a 
small pool close to Sydney Cove. This pond, in which 
