1887.] 



ON CYCIÆSTHKRTA HISLOPI. 



59 



VI. 



Occurrence and Distribution. 



The mud from which this Phyllopod was raised, I received, 

 as above stated, on the 29th October 1885. It was collected on 

 the 14th Mareh, the same year, from a fresh-water lake, called 

 the Crescent Lagoon, two miles from Rockhampton, North Queens- 

 land. From the same parcel of mud several other Entomostraca 

 were hatched, appearing successively in the same aquary as 

 the Phyllopod, viz., a few specimens of Moina propinqua, de- 

 scribed by the author at an earlier date, numerous specimens of 

 a ^Macrothrix, apparently Maclirotrix spinosa King, a few speci- 

 mens of an Ilyocryptus and of a small Alma, and four different 

 species of Cypris\ besides, in the same aquary one or two colo- 

 nies of a' fresh-water Bryozoon, apparently belonging to the 

 genus Plumatella had developed. 



In the aquary — a large cylindric glass vessel of the ordi- 

 nary kind employed in Museums for preserving larger objects 

 — there was, as above stated, an abundant growth of Con- 

 fervæ; and besides, in order to ensure the necessary aeration 

 of 'the water and to prevent the development of Bacteriæ, I 

 had previously transplanted in the mud an indigenous specimen 

 of Iris. My attempts to isolate specimens of the Phyllopod by 

 transferring them to other aquaries invariably failed of success, 

 although such aquaries had been arranged with the greatest care. 

 I am therefore inclined to believe, that the chemical composition 



