112 AUSTRALIAN FRESHWATER FLAGELLATES, 



For descriptions and figures of ,'5'. granulosa Playf. and its var. pwiilia Playf. 

 see Frw. Alg. Lisinore District ( These Proceedings, 1915, p. 314, PI. xlv., f. 

 3). Also New and rare freshwater Algae {Ibid., 1918, p. 508, PI. Ivi., f. 1—3). 



Per Synura australienais Flayf. see These Proceedings, 1915, p. 315, PI. 

 xlv., f. 4, 5. 



Fam. OCHKOMONADACEAE. 



. Genus O c h r ji o x a s Wysotski. 



OCHROMOKAS ASPERA, B.Sp. (PI. i., tigS. 14, 15). 



Cellulae a trunte suhcirculatac anteriure saepe truncatae, posteriore rotun- 

 datae, margiue granulis a.spera; a latere modice cumprcssae, ovalae, auteriore 

 acuminatae ; membrana nulla vel tenuissima et indistincta; plasmate granuloso, 

 chromatophoris (2?) luteo-viridibus, obscuris; tlagello singulo; vesiculis contrac- 

 tilibus geuiinatis miinitis uno latere juxta marginem anteriorem dispositis; stig- 

 mate nullo. 



Cell. diam. c. 8— lOju.. Byron Hay (324). 



A very minute Hagellate composed of hyaline plasma studded with amyla- 

 ceous granules which give a rough appearance to the surface, showing through 

 the cell-wall if any is present a.s it is not noticeable. In shape the cell is 

 sub-circular in front view, sometimes truncate above, and in side view some- 

 what compressed and ovate. There is an obscure patch of yellow-green chromato- 

 phore near the anterior end, a single Magellum and a pair of minute c.v. at one 

 side near the front margin ; no stigma. The animalcule can project outwards a 

 large wave of membrane ( ?) or clear homogeneous phusnia, and seize any pai'- 

 ticle of food in its vicinity. 



OCHROMONAS CYLINDRACEA, U.Sp. (PI. i., hg. K) ) . 



Cellulae cylindraceac. utro(]ue polo iDtundatae, in medio interdum paullo 

 constrict ae, margine granulis aspera; mendjrana nulla'/ vel tenuissima ?; plasmate 

 granuloso; chronjatophoris obscuris (2?) luteo-viridibus, juxta marginem an- 

 teriorem; tlagello singulo; stigniate nullo. 



Cell. long. c. 17, lat. 5,^. Byron Bay (324). 



Cylindrical in shape, rounded each end, slightly constricted in the middle, 

 other details as in the preceding species. Both forms obtained along with Scin- 

 tilla chlorina from small rainwater pools in the drained Ijog at Byron Bay. 



Genus D I N () n \i v o n Ehrcnberg. 



DiXOlSltVON SKUTL'LAIMA Ehr. (PI. i., tigs. 17—21). 



Cell. hing. 2(i— 38. lat. max. 9—10. lat. oris 8—10, constrict. 7—8^. 

 Cyst diam. 14^. 



Botany (2); Botanic Gardens (3); Sydney Water (22); Centennial Park, 

 Sydney (133); Duck Creek, Clyde (74); Guildford (172); Fairfield (83, 143); 

 Canley Vale (111); Wyrallah; Byron Bay; Lismore (332, 345, 307, 31G). 



Syn. Dinohriion sertularia var. cijlitidricum in Plankt. Sydney Water, p. 51(i, 

 PI. 57, fig. f). 0\ir common form answers exactly to Ehrenbcrg's type, but is 

 apparently somewhat smaller. The usual size of the lorica here is long. 30 — 35, 

 lat. max. 9, whereas for European specimens Lemmermann gives long. 44, 

 lat. max. 13, lat. oris 13, constr. 10 — 11 |n. Stein's figures work out at an aver- 

 age of long. 46, lat. max. 12fi. 



