A MONOGRAPH OF THE FRESH WATEK ENTOMOSTRACA OE NEW 

 SOUTH WALES. Part i. Cladoceka. 



By Marguerite Henry, B.Sc, Liruiean Macleay Eellow of the Society in Zoology. 



(Plates iv.-\aii. ; and four Text-figures.) 



[Read 29th March, 1922. J 



Introduction. 



The pioneer of the study of the Cladooera in New South Wales was the 

 Rev. R. L. King w-ho, in 1852, published two papers in which he very briefly 

 described nineteen species belonging to seven genera, one genus, TDunhevedia, 

 being new. His specimens were almost exclusively collected in the near neigh- 

 bourhood of Sydney. In 1853 Dana, with the United States Exploring Expedi- 

 tion, added one more, species which he collected from "pools near Sydney." No 

 further reference to Cladocera in New South Wales was made for twenty-four 

 years, until, in 1889, Prof. G. 0. Sars of Christiania published some brief notes 

 on some of King-'s species, the specimens having been collected for him in the. 

 Waterloo Swamps. In 1896 he published a longer paper containing the descrip- 

 tions ■ of eight new species and also more detailed descriptions of some of Ki-ag's 

 species; his material for this paper was raised from dried mud, collected in 

 swamps and pools near Sydney. In 1919 the present writer received some small 

 collections of Crustacea from eight country districts and published a paper in 

 which twenty-five species were described, seven of them being new. The material 

 for the present paper was obtained from as many localities as possible and fifty 

 species belonging to seventeen genera are dealt with; five species are described 

 as new and others are recorded for the first time, some in Australia, some in New 

 South Wales. A short description of each genus and species is given, as well 

 as keys to all the New South Wales species. 



In the other States there must be many unrecorded forms. In Queensland, 

 Sars, in 1885 and 1888, desciibcd 10 species, eight of which were new, collected 

 in the neighbourhood of Rockhamptou. No additional species \vA\e been recorded 

 since that date. 



In 1903, Haase mentioned the occurrence of five species in Victoria. In 

 1904, 1912 and 1914, Sars published three papers, eacli dealing extensively witli 

 one species, for one of which he proposed a new genus, Saijcia. Searle published 

 two papers in 1917 and 1918, in which the presence of several more species is 

 recorded, and also a table is given showing their relative numbers for every 

 montli in one year, in a certain pond. This raised the number of Victorian 

 species to sixteen. 



