130 AU.STRALIAX FRKSHWATER FLAGELLATES, 



Var. CORON'ETTA, n.var. (PI. vi., fig-. 14). 



Foi'ma ore membraua lata circumcineto. A very pretty ami distiuet form. 

 The lorica does not seem to be always perfectly spherical, but produced above 

 a little. The orifice is surrounded by a delicate and somewhat irregular, mem- 

 branous collarette which stands out at a wide angle, edges smooth. In one 

 specimen the chloroplasts were very regular, distinct and strongly marked. 

 They were of tlie usual Euglenoid type, viz.. small circular discs, but this is 

 the only occasion on wliidi I have noted this in Trachelomoiias. In this genus 

 the chlorophyll is arranged in three different ways: (1) apparently regfularly 

 diflEused throngh the outer laj'er of cytoplasm; (2) disposed in a few, large, oval 

 discs, widely separated and often more or less of irregular shape; (3) irregu- 

 larly reticulated in patches with connecting threads. 



Diani. 10. coll. diam. 10^.. Lismore (365). 



Var. I'USTULO.sA, n.var. (PI. vi., tig. 15). 



Forma pleruuKjuc hyalina, collo luillo; membrana pustulis latis pulvini- 

 formibus, minute granulatis, vestita. 



Diam. 12^. Sydney; Lismore. 



Lorica generally hyaline and covered with broad disc-shaped pustules 

 which are themselves minutely granulate. About 6 pustules across the face. 



Trachelomonas botanic'a var. boiskalis, ii.var. (PL vi., fig. 16). 



Forma modiee oblonga, collo lato divergente praedita; membrana punctata. 



Long. 36, laf. 30 J; lat. oris 8, papill. 4;^. Lismore (303). 



A more oblong forai than the tyi)e, with a wide dentate collarette round 

 the orifice. The distinguishing mark of this S5>ecies is the minute papilla at 

 the hinder end. (>nly known hitherto from Sydney — ontea, 1915. p. 9, PI. i., 

 f. 9. 



Tkac'hkloiionas Ovalis Playf'air. (PI. vi., Hg-s. 17, 18). 



Long. 23—35, lat. h}—23fi. Murwillunibali; Lismore (328, 350). 



Out of weeds in a surface-water drainage ditch at Murwillumbah in 

 quantity. It is a form rapidly developed where there is a current of water. 

 The lorica is thin, smooth, generally colourless or almost so, and transparent. 

 The figures show the chlorophyll disposed either in regular discs, or irregular 

 reticulations. 



Thachelomonas tere.s Ma-skell, luriiui. (PI. vi., fig. 19). 



Long. Corp. 27, lat. 18; coll. lat. 4, alt. 3fi. Lismore (285). 



Cf. Maskell, On Freshwater Infusoria, Trans. N.Z. Institute, vol. xx., X.S., 

 1887. Tr. terea, type, is long oval, with a slight collar round tlie orifice, mem- 

 brane smooth — the author gives long. 35^. This form is not quite typical, being 

 more oblong in outline. Four different nrcks are given whi<'li have been noted 

 in this form. 



Trai'iiklohoxas lU-Li.A var. australis Playf. (PI. vL, fig. 20). 



Long. Corp. 40, lat. 23; coll. long. 8, lat. 6^. Centennial Park, Sydney (133). 

 Only previously noted from Lismore. Tliis specimen makes our form prac- 

 tically equal in size to Stein's type (.50 X 21/i), but the shape is different. 



