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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. 



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