256 On Australian Entomostracans. 
water, and is readily known by its dusky colour. I 
should mention that I have hitherto been only able to 
examine this species with a simple lens. Future observa- 
tions may possibly prove that it is different from the 
European species. At present, the only difference which 
I can notice is that the head of each of Baird’s figures is 
larger than that of the Australian species. 
Genus Macrorurix. (Baird.) 
Superior antennz flat, one jointed, pendulous from the 
beak. Filament from the extremity of the first joint of the 
anterior branch of inferior antennz much longer than any 
of the others. 
MM. spinosa. (Plate VI. F.)—General shape of the 
carapace and head oval. Antenne are those of the 
genus ; but each of the long setze of the inferior antennz 
has its first joint produced beyond the articulation of the 
second into a spine. The setz are not plumose. 
Habitat.—The South Creek. Pond on the road side 
between Liverpool and Sydney. 
LyNcEID. 
This family includes the whole of the genus Lyncrus 
of Mutter, Latreiue, &c. 
Character.—“ Two pairs of antenne; superior very 
short; inferior of moderate size and branched, with 
branch divided into three articulations. Feet five pairs. 
Eye single, but accompanied with a black spot in front of 
it. Intestine convoluted, having one complete turn and 
a half. Abdominal portion of the body jointed.”—Baird. 
The genus Lynceus was established by Miiller in 1776. 
He called it by this name because, considering the black 
spot, which is often large, as a second eye, he thought that 
it was well provided with visual organs. Mr. Baird 
