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Show 1886.] ENTOMOSTRACA FROM SOUTH AUSTRALIA. 85 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 £, width ^. Hab. Freshwater pools, Rivoli Bay, South Australia (Prof. R. Tate). Subfamily ESTHERIAN^E, Packard. Genus ESTHERIA, Rtippell. 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 T 4 6-. Hab. Cooper Creek, at Innaminka, Central Australia (Prof. R. Tale). 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 |
