BY G. I. PLAYFAIR. 123 



EUGLENA PUSILLA, Il.Sp. (PI. iv., figS. 20, 21). 



Eus'lena iiiiiiinia, cylindi-ai-e:). nti'iKnie tine attemiala, fronte coiik-a, postice 

 abnipte acuminata, caiida minima instrncta; baculis amylaeeis singulis maximis. 



Long. corp. 2()— 30, lat. 9—10; long. caud. 3 — ifjL. Lismore (260). 



Another minute species, in shape something like E. vivida, but very dif- 

 ferent in details. Tiie body is cylindrical, narrowed at each end, conical in 

 front and abruptly acuminate behind, where there is a short tail. The chloro- 

 jilasts seem to be scattered flakes, smnetimes connected with an irregular paramy- 

 Inm granule; a single, very large and stout paramylum rod in the centre; flagel- 

 liim? 



Var. I.OXGA, ii.var. (PI. iv.. tig. 22). 



Forma pisciformis, uno latere fere recto, altero arcuato, fronte attenuata, 

 pone spina praedita, baculis amylaceis binis validis. 



Long. e. sp. 74, lat. 16; sp. long. 12^1^. Lismore (237, 238). 



Another very fish-like form, longer tlian the type, attenuate in front, fur- 

 nished with a spine behind, one side nearly straight, the other arched. Two 

 stout paramylum rods present. This variation was plentiful in gathering 238; 

 Ijotb it and the type have stout membranes and are not metabolic. 



1 EUGLEXA sp. (PI. iv., tig. 23). 



r have seen l)ut (jne specimen of the form here Hgured, b>it, although I wa,s 

 able to observe all details, I i-egard it with too much suspicion to name or de- 

 scribe. It is a minute form with a long flagellum, and very vivacious in its 

 moveiuents, as these small fomas generally are. Several indications jjoint to the 

 possibility of its being the zooid of Tracheloinoiias escaped from a broken lorica. 

 This is not impossil)le, Init I have no knowledge as to whether Trachelomona^ 

 will remain active under these conditions. The size and shape are exactly those 

 of Tr. ampullula Playf. ("The genus Trachelomonas," p. 16, PI. ii., f. 6) ; 

 unfortunately, I have no note on the constitution of its zooid. The liuge, s(|uare, 

 pale stigma, however, is more general in TrachelomotKm; tlie suhglobose nucleus 

 at tJip hinder end of the cell I have never observed in Euglena before, and it 

 usually points to a loricate animalcule (compare the Rhizopoda) ; the chloro- 

 phyll diffused through the outer layer of cytoplasm is fref|uent in Trachelomonas, 

 but rarely, if ever, found in Euglena. Compare Tr. splendida, PI. vii., f. 1. 



Genus P h a c u s Nitzsch. 

 Phacus pleuronectes (Muller) Duj. (PI. v., tig. 1). 



Long. Corp. 36 — 56, lat. 27 — 42; long. caud. 7 — 14^. 



Auburn (68); Rookwood; Botany (91); Guildford (45, 77); Casino; Wyral- 

 lah: Lismore (187,258,260.295). 



Dujardin, op. cit., p. 336, PI. v., f. 5, gives for dimensions, long. 40 — 45, 

 lat. 22J — 30^, which is a fair average size. 



\'.ar. MiNUTUS, n.var. (PI. v., fig. 2). 



(.>uam forma typica dimidio minor. Long. 20 — 28, lat. 11 — 22//. 



Hotanic Gardens, Sydney (3); Wyrallah; Lismore (260). 



Half as large only as the type and much less common. 



Var. atjstralis, n.var. (PI. v., fig. 3). 



Forma magis ovalis, duplo major. Long. 90, lat. 53;^. Guildfoivl (114). 



