823 



AUSTRALIAN FRESHWATER PHYTOPLANKTON. 



[Protococcoide^. 



By G. I. Plaitair, Science Research Scholar of the 

 University of Sydney. 



(Plates Ivi.-lix.) 



The bulk of tlie material, on which the following notes are 

 based, has been gathered at intervals during the past ten years, 

 from the suburbs of Sydney, and from the neighbourhood of 

 Lismore on the Richmond River. A few records are included, 

 howevei', from still earlier up-countr}' gatherings at Collector, and 

 from certain samples which have been received from places out- 

 side the State of New South Wales. The opportunity has been 

 taken, also, of revising the nomenclature of some of the plankton- 

 forms noted in "Plankton of the Sydney Water-Supply" (these 

 Proceedings, 1913). 



Habitats. — The term "plankton" has been taken in a wide 

 sense to include material found floating in the water of river, 

 lake, lagoon, and pond, or shaken out of weeds in some depth of 

 water. The following list shows the chai'acter of the habitat of 

 all the gatherings referred to in the notes. River: 26, 44, 63, 

 74, 80, 81, 90, 100, 115, 180, 182, 187, 188, 189, 191, 193, 195, 

 196, 269, 274, 276, 281. Lagoon: 17, 37, 50, 51, 71, 91, 92, 95, 

 97, 99, 108, 133, 136, 144, 145, 152, 155, 258, 259, 260, 263, 

 285, 286, 290, 298. Pond: *3, 23, 45, 70, 77, 88, 124, 125,* 

 138, 150,* 156,* 158,* 172. Creek-pool: 112, 129, 130. 



New forms. — One new genus is proposed, and descriptions are 

 given of 61 forms of Frotococcoidece, which appear to be new, 18 

 being classed as species, 37 as variations, and 6 as forms. 



* Gardeners' tank, in tlie Botanic Gardens, fed from the Sydnej' Water- 

 Supply. 



