633 RHIZOPODS OF SYDNEY AND LISMORE. By G. I. Playfair, Science Research Scholar of the University of Sydney. (Plates xxxiv.-xli., and seven Text-figures). The summer of 1916-17, with its alternate rain and shine at Lismore, was highly favourable to ever}' form of pond-and swamp-life, and among a host of interesting organisms that came to light, was a varied assortment of Rhizopods. I thought it a good opportunity, therefore, to write up this group, particularly as I had reason to believe that the species were to be found in considerable variety in my gatherings. A microscopical survey of the lattei' was accordingly made, with very satisfactory results. Samjjies. — Out of about 340 gatherings, not made for the collection of Rhizopods, but principally for Desmidiacece and Fro-tococcacece. 90 were found to contain tests of the Bhizopoda to a greater or less extent; 43 of these were from Sydney, and 47 from Lismore. The localities and numbers of the samples are given in the notes on the various species, but as very few gatherings are out of Sphagnum (the chief haunt of the Bhizopoda), a note here on the character of the various habitats may be useful. Sphagnum : — all marked Coogee. Weeds {Myriophyllum, Elodea, Sic.) in pond, creek, or river: — Botany 50, 151; Lismore 181, 188-197, 273-278, 303; Woodlawn 225; Casino 189; all those marked Botanic Gardens, Guildford, Centennial Park, and Clyde, Duck Creek. Plankton : — Sydney Water-Supply 66, 100; Grafton 265. Swamp : — all others marked Botany,* Auburn, Rookwood, Wyrallah, Kyogle, Byron Bay; and Lismore 223-263, 285, 292, 298, 307-340. By "swamp" should be understood all ground-collections. * Of these, Nos.15, 17, 37, 51, and 152 are from the water-reserve, which is an old Sphagnum-hog; patches of Sj'haipium may still be met with here and there. 46
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