200 On Australian Entomostracans. 
I have dedicated this species—the largest of the family 
hitherto found in Australia—to the author of ‘the British 
Entomostraca,” a work from which I have derived much 
assistance, and not a little gratification. 
At present itis confined to a single locality, from which 
I have procured it but once; when also my means of 
observation were very limited. 
Habitat.—The Lachlan Swamp, Sydney. 
(2.) A. pulchella. (Plate VIII. B.)—Carapace sub- 
quadrangular, obliquely striate; dorsal edge rounded, 
anterior slightly curved, convex above, concave below, 
ciliated, setze of rami simple. The dorsal edge of the last 
joint of the abdomen is very slightly sinuated, but forms 
an obtuse angle near the joint. The terminal spines. are 
long. 
Habitat.—Varroville, near Denham Court. St. Leo- 
nard’s, near Sydney. | 
(3.) A. diaphana. (Plate VIII. C.)—Carapace rounded 
on the dorsal margin, angular on the anterior margin, 
every where convex. 
Rami and setz as in A. pulchella, which this species 
greatly resembles. 
In confinement it keeps close to the edge of the water. 
I had no difficulty in keeping it for a considerable time in 
a small basin of water, in which were a few plants of 
Lemna minor, Its transparency makes it a very beautiful 
microscopic object. 
Habitat.—Pond near Sydney. 
(4.) 4. Karua. (Plate VIII. D.)—Resembles 4. pul- 
chella in contour, but is smaller and shorter in propor- 
tion to its breadth. The beak is very much produced. 
Rami with four setz, and a short spine on the posterior 
branch; three on the anterior. The dorsal edge of the. 
