24: 



QUEENSLAND SPECIES OF ARCELLA, 



(3). Locality, Beerburrum. Date, 29th June, 1917. 

 Two living Arcellae observed, both A. vulgaris. 

 (4). Locality, Chelmer. Dale, 29th Aug., 1917. 

 Eight living Arcellte observ^ed, all A. vulgaris. 

 (5). Locality, Graceville. Date, 29th Aug., 1917. 

 Twenty-three living Arcellte observed, all A. vulgaris. 

 (6). Locality, Cooroy. Date, 6th Oct., 1917. 

 Fifty living Arcellee observed, all A. artocrea. 

 (7). Locality, West Burleigh. Date, October, 1917. 

 Twenty-three living Arcelhe observed, all A. artocrea. 

 (8). Locality, Maryborough. Date, 24th Nov., 1917. 

 Twenty-two living Arcellffi counted, all A. vulgaris. 



Oct. Nov. Dec Ja-r). Fet. Mir Apl. Miy Jun. Jul. /lu§. Sep. Oct. Nov. Dee. 



Fi^. 1. — Percentage -t'luqueuoy of ArcdJa ru/gari.shi Arcellaii fauna. Brisbane 

 Botanical (hardens: Sept. 29th, 1916, to Dec. 29th, 1917. 



(3.) Conclusions. 

 Figs. 1-4 are graphical representations of the data given in 

 Table i., and each species is graphed separately. It will be seen 

 that the polygons are constructed on percentages. In taking 



