1886. ] ENTOMOSTRACA FROM SOUTH AUSTRALIA, 8h 
oval, the width equal to more than half the length, broadly rounded 
behind, subacuminate in front. ‘The shell is granular in structure, 
without any concentric ridges. Length + of an inch, height 4, 
width 3. 
Hab. Freshwater pools, Rivoli Bay, South Australia (Prof. Jip 
Tate). 
Subfamily Esrpertan#, Packard. 
Genus Esruerta, Riippell. 
1. EstaeriaA LuTRARIA, n. sp. (Fig. B.) 
Valves oblong, compressed, membranous; beak near the anterior 
extremity, lines of growth about twelve; seen laterally, the dorsal 
line is quite straight, ventral convex, anterior extremity broadly 
rounded, posterior narrowed and somewhat oblique ; seen from above 
it is much compressed behind the middle, and sharply pointed at the 
extremity; broadly rounded in front. Colour yellowish brown. 
Length ,4, of an inch ; height ;%. 
> Hab. Cooper Creek, at Innaminka, Central Australia (Prof. Rk, 
ate). 
Fig. B. 
Estheria lutraria. 
Prof. Tate’s specimens include only a single example of this species 
—a dried empty shell ; apparently somewhat shrunk and distorted. 
The specific name refers to the Molluscan genus Lutraria, which it 
rather closely resembles. 
2. EsTHERIA PACKARDI, n. sp. (Fig. C.) 
Valves, seen laterally, subelliptical, beak prominent and situated 
near the anterior extremity, extremities rounded, the anterior much 
the wider of the two, dorsal margin straight in the middle, ventral 
convex ; lines of growth 12-15, not sharply marked. Shell rather 
