BY JIARGDBRITB HENRY. 4d 



•off. Surface of the valves smooth, no sculpturing jpresent. Eye of moderate 

 size, ocellus very slightly smaller. Antennules narrow, not quite reaching the 

 rostral tip. Post-abdomen very similar to the preceding species, marginal den- 

 ticles somewhat smaller and lateral combs usually fewer in number. Colour 

 yellow. Length .48 mm. 



This species is very closely related to the preceding species, A. pulchella 

 King, the chief differences being the entire lack of markings on the carapace 

 and the slightly different armature of the post-abdomen. It has a wide distri- 

 bution in the country, districts of N.S.W., having been collected at Byron Bay, 

 Kendall, Bathurst, Moss Vale, and Lismore. Sars' specimens came from Rock- 

 hixmpton, Queensland. 



Genus G r a p t o l e b e r i s Sars, 1863. 



Female. Head not carinate, rostrum broad, carapace conspicuously reticu- 

 lated, two strong teeth on infero-posteal corner of the valves. Eye much larger 

 than the ocellus. Fost-abdomen nearly triangular, marginal spines small; end- 

 claws with one accessory spine, sometimes wajiting. Five pairs of feet. 



Male. Smaller than the female, first pair of feet with hooks. Post-abdomen 

 narrow, with a crenulated but unarmed posterior edge. End-claws small, disc- 

 like. 



Only one species is known. 



Gbaptolebeeis testudinaeia (Fischer). (Plate vi., figs. 5-5a.). 



Lynceus testudmarius Fischer (1848, p. 191) ; Alona testudinarius Scboedeler 

 (1863); Lynceus retimlatus Fric (1872). 



Female. Carapace, seen laterally, somewhat oval, dorsal margin evenly 

 arched, ventral fairly straight, posterior margins narrow, truncated. Infero- 

 posteal comer armed with two strong teeth. Head large, fornix very broad, 

 forming a semi-circular rostrum covering the antennules and extending down as 

 far as the ventral margins of the valves. Reticulation of the carapace very dis- 

 tinct. Ocellus smaller than the eye, and closer to it than to the tip of the ros- 

 trum. Post-abdomen bent at the sharp pre-anal angle, somewhat triangular in 

 shape. Marginal spines small, end-claws with one small basal spine. 



Distribution. — This species has only been obtained from two localities in 

 New South Wales, a pond in the University grounds and Moss Vale and in both 

 «ases, very few specimens were found. The Moss Vale specimens are distin- 

 guished by a much more erect head than is typical; the rostrum pointing for- 

 wards instead of downwards and not nearly reaching the ventral margins of the 

 valves. The species occurs in Europe, North and South America, Asia, Iceland, 

 Azores. 



Genus D tJ X H E V E D I A King, 1853. 



General shape rounded. Valves obscurely reticulated. Rostrum short. 

 Infero-posteal angle rounded with one or two teeth. Post-abdomen with many 

 fine denticles, end-claws short and curved, with one basal spine. Post-abdomen 

 in male armed with fine hairs only. Seven species have been described, two of 

 which are found in New South Wales. 



Key to species of Dunhevedia. 



A. Seen from above the outline is obovate crassa. 



AA. ,, ,, ,, , concave in the middle podagra. 



