BY MARGUERITE HENRY. 41 



Female. Carapace, seen laterally, oval triangaUar, slightly widening pos- 

 teriorly; dorsal margin evenly arched, ventral almost straight, posterior angles 

 rounded off. Head bent forward, rostrum acute. Sculpture of the carapace 

 consists of longitudinal striae, ventral edges bearing a thick row of setae. Eye 

 of moderate size, ocellus very slightly smaller and situated closer to the eye 

 than to the tip of the rostrum. Post-abdomen strongly built, slightly widening 

 distally, supra-anal angle not prominent, 15 denticles present on the infra-anal 

 margin, also 15 lateral combs. End-claws long, each with a strong secondary 

 at the base. Length .63 mm. 



Distribution. — Centennial Park, Kendall. Tliis species has not as yet been 

 recorded outside N.S.W. 



Alona kendallensis Henry. (Plate viii., fig. 7.). 



Proc. Roy. Soc. N.S.W., lii., 1918 (1919), p. 474. 



Distrihution.—^.^.\N. : Kendall. 



Aloxa longirostris Henry. 



Proc. Roy. Soc. N.S.W., Hi., 1918 (1919), p. 475, PI. xli., figs. 11-12. 



Distributioti. — N.S.W. : Byron Bay, Centennial Park. 



Aloka clathrata Sars. 



Described by Sars (1888, Plate 6, fig's. 7-10) from specimens raised from 

 dried mud collected at the Gracemere Lagoon, near Rockhampton. 



Female. Carapace, seen laterally, short, rounded, quadrangular; dorsal mar- 

 gin strongly arched in the middle, ventral fairly straight, ascending anteriorly, 

 posterior .edge truncated, with the upper angle distinct, the lower rounded. Ros- 

 trum elongated, acute. Ocellus about the same size as the eye and situated closer 

 to it than to the tip of the rostrum. Antennules long, slender, the terminal 

 papillae reaching beyond the rostral tip. Surface of the carapace marked by a 

 regular reticulation. Post-abdomen short and broad, truncated, bearing small 

 strong anal denticles; lateral combs absent; end-claws short, secondary spines 

 very minute. Colour pale yellow. Length .38 mm. 



Distribution. — N.S.W. : Lismore, Byron Bay; Queensland. 



Aloxa micrOTATa, n.sp. (Plate viii., figs. 4-4a.). 



Female. Carapace, seen laterally, truncated oval in shape; dorsal margin 

 boldly arched, ventral ai'ched anteriorly, then cui-ving upwards to join the com- 

 paratively short posterior edges which are almost straight. Head broad, ter- 

 minating in an elongated rostrum which reaches below the ventral edges of the 

 valves. Eye large, ocellus very much smaller and situated closer to the eye than 

 to the tip of the rostrum. Antennules long and slender, not reaching the tip of 

 the rostrum. Antennae short, bearing comparatively long swimming bristles. 

 Lip-plate large, margin smooth. Surface of the carapace marked by a distinct 

 reticulation in the anterior portion, posteriorly very weak or completely absent. 

 Post-abdomen strongly built, broadening distally, the corner opposite the end- 

 claws projecting, supra-anal angle not very distinct; nine marginal denticles 

 present, rapidly increasing in size distally, lateral fascicles absent; end-claws 

 very long, with a small secondary spine at the base of each. Colour very pale 

 yellow. Length .28 mm. 



Distribution. — Orange. 



This very minute form somewhat resembles Alona abbreviata in its general 



