The Victorian naturalist . acoda There is little or no information inthe Australian literature regarding thetwo genera which occur on Big GreenIsland. Both are known to occur, how-ever, in the fauna of south-westernAustralia (McKenzie, unpublisheddata based on collections by D. H. ). Cypridopsis is a cosmopolitan genusespecially well represented in thefauna of the Ethiopian Province whichincludes about 40 species; but there isonly one good described Australianspecies, viz. Cypridopsis australis(Henry 1923) and a second, doubtfulspecies, Cypridopsis funebris (Brady1886). Several undescr
The Victorian naturalist . acoda There is little or no information inthe Australian literature regarding thetwo genera which occur on Big GreenIsland. Both are known to occur, how-ever, in the fauna of south-westernAustralia (McKenzie, unpublisheddata based on collections by D. H. ). Cypridopsis is a cosmopolitan genusespecially well represented in thefauna of the Ethiopian Province whichincludes about 40 species; but there isonly one good described Australianspecies, viz. Cypridopsis australis(Henry 1923) and a second, doubtfulspecies, Cypridopsis funebris (Brady1886). Several undescribed species ofCypridopsis occur in the south-westernAustralian collections referred toabove and at least one other un-described species lives on some littoralsof Victorias western district lakes sothat in sum over half a dozen Austra-lian species are known. Cypridopsisspecies typically are small (about 0 5mm long) and subtriangular in lateralview and all have the reduced, whip-like furca which is a tribal May, 1968 121 The genus Bradycypris was es-tablished by the great Norwegianbiologist, G. O. Sars, for a moderatelylarge (about 1-5 mm long) Africancypridid characterized by a slenderfurca, transversely striated inner list,numerous chitin rosettes on theZenkers organ and an ovate shape indorsal view (Sars, 1924). No describedAustralian species have yet been as-signed to this genus but from theillustrations the species recently refer-red to Cypris crinata Henry may wellbelong here (Chapman, in Bayly,Bishop and Hiscock, 1967) and, asnoted above, there is a Austra-lian species. Bradycypris is restrictedto the Ethiopian and Australian Pro-vinces. The Big Green Island popula-tion includes males and females andclosely resembles the African typespecies except for minor differences insuch characters as the shell and penis. Discussion Since Ostracoda do not fly and thegenera concerned could not survivesea transport, it may seem difficultto account for their prese
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