1886.] 



ENTOMOSTRACA FROM SOUTH AUSTRALIA. 



sr. 



oval, the width equal to more than half the length, broadly rounded 

 behind, subacutniuate in front. The shell is granular in structure, 

 without any concentric ridges. Length i of an inch, height ^, 

 width g. 



Hab. Freshwater pools, Rivoli Bay, South Australia (Prof. R. 

 Tate). 



Subfamily EstherianjE, Packard. 



Genus Estheria, Riippell. 



1. Estheria 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 ^\ of an inch ; height y^g-. 



Hab. Cooper (Jreek, at Innaininka, Central Australia (Prof. R. 

 Tate). 



Fig. B. 



Estheria lutraria. 



Prof. Tate's specimens include only a single example of this species 



a dried empty shell ; apparently somewhat shrank 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 



