838 AUSTRALIAN FHESHWATKR PLANKTON, 



Lagerheim, Pedi. Protococc. o. Palm., p.70, T. iii., f.25, 26. 

 Cells somewhat fusiform, outer ends acute, inner ends blunt. In 

 all forms of Act. Ilanfzschii, the cell-contents are indifferently 

 hyaline, pale blue or pale green. Tlie chk)roplast, when distinct, 

 is generally somewhat retracted from the apex, and an elieoplast 

 is often present. 



ACTINASTRUM BACILLARE, n.sp. (PI. Ivii., f.28, 29). 



CelluliB bacilliformes, gracillimse. Ccenob. (8 cell.)diam. 16.35, 

 cell. 8-20 X 1 1-2/x. 



Parramatta Pai^k (136); Lismore (274). 



The cells, instead of being fusiform, are narrow and linear, 

 Bometimes very short. 



ACTINASTRUM ACICULARE, n.Sp. (PI. Ivii., f.30). 



Cellulse subulata;, modice arcuatse, basi intlatte, apice acuta;. 



Ctenob. (8 cell.) diam. 35, cell. 22 x 3/x. 



Lismore (274). 



The cells are somewhat awl-shaped, slightly curved, inllated at 

 the base, and acute at the tip. Contents pale blue, an elieoplast 

 present. 



ACTINASTRUM GUTTULA, n.Sp. (PI. Ivii., f.31). 



Cellulje in modo guttuUe conformatte, introrsum acutissimse. 

 Ccenob. (2 cell.) diam. 40, cell. 20 x 4/x. 

 Parramatta Park (136). 



A 2-celled coinobium noted with drop-shaped cells, the acute 

 end inwards. 



Genus Kirchneriella Schm. 



KiRCHNERIELLA ELEGANS, n.Sp. (PI. Ivii., f.32). 



Cellulse graciles; lateribus parallelis; apicibus obtusis in modo 

 solese equi circumflectic. Cell. diam. 6, crass. 2fi. 



Sydney Water (63). 



The cells in this form are very slender, with parallel sides and 

 blunt ends, bent round into the shape of a horseshoe. A four- 

 celled coenobium noted with cells disposed as figured. 



