[No- 7. 



aquary. There were apparently only a few specimens, of which 

 I secured 3 for closer examination and preserving. As with the 

 preceding form, it was only for a few days I had the opportunity 

 of observing its habits, since the specimens left in the aquary 

 very soon disappeared, without having produced a 2nd gene- 

 ration. 



In its motion this form somewhat resembles the species of 

 the genus Acroperus Baird, moving about by short jerks and by 

 no means with great activity, the body turning now its dorsal 

 surface upwards, now one of its sides. More generally it rests 

 on the bottom or clings to the walls of the aquary or to any 

 other submerged objects. 



Occurrence. — As stated above, the present species was 

 raised from the same parcel of mud as the preceding Lynceid, 

 the material being derived from a Water Hole at Cattle Station 

 — 20 miles from Rockhampton. — Mr. King observed the spe- 

 cies in but one locality, a pond near Sydney. 



8. Alonella Karua, (King). 



(PI. 5, figs. 8-9). 



Alona Karua, King, On Australian Entomostracans, L c. p. 



260, pi. vm D. 



Specific Characters. — $ . Carapace much compressed, as seen 

 laterally subquadrangular in form, somewhat broader anteriorly, 

 posterior extremity abruptly truncate, inferior edges of valves 

 subangular in the middle. Head depressed, terminating in a 

 rather prominent sharp rostrum. Surface of shell sculptured 

 with well-marked, rather distant striae, on the posterior part 

 quite straight and somewhat oblique, on the anterior part of the 

 valves arcuate and obliquely ascending. Ocellus smaller than 

 eye and located closer to it than to the tip of the rostrum- 

 Antennuhe slender conical, not reaching to the tip of the ros- 



trum. Tail considerably dilated distally, with the apex 



broadly 



