110 ax.>;ti;a[,ian- fkeshwatp:!! flaglllates, 



Fam. PHAEOCAPSACEAE. 



Genus Phakococcus Borzi. 



Phaeococcus planktokicus W. aud G.S. We.st. (PI. ii.. fig. 11). 



Coeiiob. iliaiii. 90; Cell, diaui. 10^. Botany. 



Obtained once only in a ground gathei-ing ot mixed microseopie life from 

 Gardener's Road swamps, Botany. It was in the ytococystis condition as a 

 hyaline, structureless, mucilaginous coenobium containing 4 families of about 8 

 cells each. The cells were globose, with two yellow-ljrown parietal ehromato- 

 phores disposed as in Hynura or ilaUomuuas. Senn lias no place for this genus 

 in his "Flagellata" ; I include it here from some resemblance to I'haei>ciisti!<, at 

 least in its vegetative condition. 



Fam. SCINTILLACEAE. 



Genus S c I X T I l l a, n.gen. 



Cellulae minutae, delieatissime, ovatae vel ovales; membrana tenuissima, 

 glabra, hyalina, granulis nullis nee setis; chromatophoris 2 parietalibus per 

 longitudinem dispositis; tiagellis 2 tenuissimis; vesiculis contractilibus 2 postice 

 instructae; stigmate nullo. 



Scintilla chlorina, n.sp. (Fl. ii., figs. 12 — 14). 



Cellulae ovatae subeuueatae, fronte angustiores, postice late-rotundatae ; polo 

 anteriori modice deplanatae et saepe levissime emarginatae; membrana delicatis- 

 sima hyalina glabra; tiagellis 2 tenuissimus; chromatoijhoris 2 Uiteo-viridibus; 

 stigmate nullo. 



Cell. long. 7J— 21; lat. 4^— 12i^. Byron Bay (324). 



A very rare flagellate which I obtained in some quantity from the drained 

 bog at Byron Bay soon after rain. In shape the cell varies from ovate to sub- 

 euneate, narrower in front, well rounded behind, sides often somewhat (latteued 

 towards the anterior end, whicli is subtruncate and slightly emarginate. Mem- 

 brane very delicate and indistinguishable, smooth, hyaline, without markings or 

 setae; liagella two. The cell contents are arranged iis in Synura or MulUinumas 

 with two, thin, yellow-green, parietal chromatophores disposed longtitudinally, 

 starting in front and gradually developing right back to the hinder end. When 

 the opposite edges of the chromatophores just overlap in the middle there api)eur 

 to be four longitudinal chromatophores l)ut this is an illusion. Tlie posterior por- 

 tion of the contents is a clear, transparent, homogeneous nniss, generally sur- 

 rounded by large amylaceous granules ; no stigma, but there seem to be two 

 pulsating vacuoles l)eliiud. With dilute formalin the cell crumples up at onco 

 to a shapeless mass, extruding the contents; this does not occur in Hynura or 

 ilallomonaa. It is generally taken to indicate the entire absence of cell-wall, 

 but of this I have my doubts. Ci. Phaeoci/stis globosa Scherffel in Lemmer- 

 maiin (Nord. Plaukt., xxi.) Flagellatae, p. 2, f. (i. 



Scintilla si'LENDiDA, n.sp. (PI. ii., tig. 15). 



Cellulae ovales, polos versus praecipne anteriore modice attenuatae, fronte 

 levissime emarginatae; membrana glabra granulis nullis nee setis; tiagellis 2 

 tenuissimis; stigmate nullo; chromatophoris obscure viridibus. 



Cell. long. 31, lat. Idfi. Lismore (347). 



