88 DR. G. S. BRADY ON FRESHWATER [Feb. 2, 
by Dr. Baird (Proc. Zool. Soe. 1850, p. 254); and L. angasi of the 
same author, 1866, which is of a pale horny colour, and is common in 
the rain-pools about Adelaide. ZL. viridis is characterized by its fine 
green colour, by its oval carapace covering less of the body than in 
LL. angasi, and the edges of the lower half of its length being serrated ; 
L. angasi is distinguished by its horny colour, its rounded carapace 
Fig. E. 
Lepidurus viridulus. 
covering nearly two thirds of the body, and by the smooth edges of 
the sides of the carapace. 
“ L. viridulus differs from Z. angasi in colour, in the carapace 
covering more of the abdomen, its keel limited to the hinder part 
and in the narrower and more spathulate tail-flap.” —Trans. & Proc. 
& Report of the Philosophical Society of Adelaide, South Australia, 
for 1878-9, p. 136 (published 1879), afterwards called the Royal 
Society of South Australia. 
Order OSTRACODA. 
Family Cypripip4. 
Genus Cypris, Miiller. 
1. Cypris virn1puLA, n. sp. (Plate VIII. figs. 1, 2.) 
“ Carapace oblong, compressed, reniform, greatest height situated 
in the middle, and somewhat less than half the length; seen from 
the side the extremities are well rounded, the anterior somewhat the 
narrower of the two, dorsal margin almost flat or very slightly arched, 
ventral sinuated in the middle ; seen from above, compressed, ovate, 
twice as long as broad, widest in the middle, gradually tapered 
towards the anterior extremity, which is subacuminate, posterior 
extremity narrowed and rounded ; surface smooth and polished, the 
