42 FRESHWATER ENTOMOSTRACA OP N.8.W. ]. CLADOCERA, 



appearance, but it differs greatly in the form and armature of the post-abdomen 

 and the sculpture of the carapace. 



Alona cambouii Gruerne & Richard. (Plate viii., fig. 5). 



Described by Guerne and Richard in 1893 from specimens collected in Mada- 

 gascar. 



Female. Carapace, seen laterally, oval in outline; dorsal margin evenly 

 arched, ventral edges almost straight, infero-posteal angle rounded. Head of 

 moderate size, terminating in an obtuse rostrum. Eye of medium size, ocellus 

 much smaller, situated closer to the eye than to the tip of the rostrum. Anten- 

 nules almost reaching the rostral tip, two of the olfactory setae longer than the 

 rest. Lip-plate rounded. Carapace marked by a reticulation or simply punc- 

 tate. Post-abdomen short and broad, of uniform breadth throughout, supra-anal 

 angle very distinct; 8-10 anal denticles, each with a minute accessory spinule, 

 5-8 lateral fascicles, the longest spine in each passing the dorsal margin; end- 

 claws long, smooth, each provided witli a basal spine. Colour yellow. Length 

 .48 mm. 



Distribution. — iN.S.W. : Port Stephens; New Zealand, South America. India, 

 Madagascar, Palestine. 



Alona "wallaciaxa Henry. 

 Proc. Roy. Soc. N.S.W., lii., 1918 (1919), p. 472, PI. xli., figs. 7-8. 



Distribution.— '^.S.W. : Kendall. 



Alona abbreviata Sars. (Plate viii., fig. 8). 



Described by Sars in 189C. 



Female. Carapace short and stout, somewhat quadrangular in lateral view, 

 the greatest height in front of the middle ; dorsal margin curved rather abruptly 

 anteriorly, ventral slightly curved, posterior edges transversely truncated. Head 

 fairly erect, terminating in an acute rostrum. Eye of moderate size, ocellus 

 smaller, situated closer to the eye than to the rostral tip. Carapace marked by 

 a reticulation in the posterior portion, anteriorly by a series of transverse curved 

 lines: Post-abdomen short and very stout, supra-anal angle prominent ; 10 dis- 

 tinct anal denticles, lateral fascicles absent; end-claws moderately strong, each 

 armed with a small basal spine. Length .37 mm. 



Distribution. — N.S.W. : Orange, Bathurst, Pond near Bourke St., Sydney. 

 Alona pulohella King. (Plate viii., fig. 6). 



First described by King (1852, p. 260). Fully described by Sars in 1896. 



Carapace, seen laterally, somewhat oval in outline, not widening posteriorly, 

 dorsal margin evenly curved, ventral almost straight, posterior edges oblique. 

 Head fairly erect, rostrum acute. Carapace striated longitudinally, striations 

 faint. Eye of moderate size, ocellus smaller and situated very slightly closer to 

 the eye than to the tip of the rostrum. Antennules not reaching the rostral tip. 

 Post-abdomen rather short, transversely truncated at the tip, of uniform breadth, 

 end-claws long, each armed with a secondary denticle at the base. About 12 

 infra-anal denticles and the same number of lateral fascicles. Length .59 mm. 



Distribution. — ^N.STW. : Waterloo Swamps, Varroville, St. Leonards, Hol- 

 brook. Mudgee, Byron Bay; Victoria; South Africa. 



Alona labvissima Sars. (Plate viii., figs. 3-3a.). 

 Described by Sars in 1888. 



Carapace, seen laterally, oval in outline, dorsal margin evenly curved, ven- 

 tral edges straight, posterior edges truncated, upper angle obtuse, lower rounded 



