122 AUSTRALIAN KHKSHWATER FLAGELLATES, 



Vai'. OBESA, n.var. (PL iv., fig. 14). 



Forma IVrp siihaeiica, superne (|uam levissime proflucta. 



Long. 55. lat. 52ij.. Lisinore. 



A rare form, almost exactly spherical, but produced a little above and 

 notched at the opening of the pharynx. 



Var. BULLATA, n.var. (PI. iv., figs. 15, IG). 



Forma subglobosa, sursum in protuberationem conicani producta, i)une bulla 

 latissima instrueta. 



Long. 53—55, lat. 42 — 16;^. Lismore (328). 



This form is globose but more produced above into a distinct conical pro- 

 tuberance, while below it is furnished with a low wide boss. 



EUGLENA GUTTDLA, n.S)). (PI. iv., fig. 17). 



Euglena minima, fere sphaerica; fronte bulla conica instmcta; pone rotun- 

 data, interdu)n quam levissime acuminata; flagello longo; cytoplasmate inter- 

 dum gi'anulato. 



Long. 1&— 19, lat. 14-^17, lat. ap. '2S^. Guildford (146) ; Lismore. 



Another free-swimming species, found among w-eeds in deep water, smaller 

 and rarer than Euglena texta and its forms. It is globular, with a conical pi-o- 

 jection in front. The chloroplast seems to bo in a single, thin, parietal, equa- 

 torial band; flagellum long, movements lively. 



Var. ELONGATA, n.var. (Fl. iv., fig. 18). 



Forma raodiee oblongo-eylindracea, medio paullo constricta, sui-sum leviter 

 attenuata, fronte rotundata acuminata, postiee globosa. Cytoplasmate liyalino; 

 in medio zona chlorophyllacea ; flagello longo; vesiculo contractili subapieali; 

 pone macula fusca magna (stigmate?) instrueta. 



Long. e. 19—22, lat. c. lO^a. 



Seems to be an outgrowth of tlie type. In shape oblong-cylindrical, some- 

 what constricted in the middle, narrowed in front and conical, ranning to a 

 point, globose behind. A subapical c.v. noted, and, in the centre of the pos- 

 terior half of the cell, a large pale-brown spot or globule which might be a 

 stigma, though 1 have never before seen the stigma in such a position in Euglena. 

 As in the type, there is a thin median ])arietal band of chlorophyll. Flagellum 

 long, movements very active. 



Euglena viviua, n.sp. (PI. iv., tig. 19). 



Euglena minima, lineari-elliptica. fronte acute-rotundata, postiee rapide at- 

 tenuata et acuminata; cauda nulla; chloropla-stidibus parietalibus singulis, 

 utrinque pyrenoidibus uuignis singulis; stigmate parvo; flagello longo; granu- 

 lis amylaceis nuUis nee baculis. 



L("ing. .30— .32. lat. 7;it. Lismore (293, 347). 



A minute but most energetic species, swimming rapidly, turning and twist- 

 ing at a great rate. Euglena vivida is very distinct and clear-cut in appearance, 

 linear elliptic, acutely rounded in front iind rapidly narrowed behind into a 

 sharp point, but without a tail; veiy nmch more resembling a fish than Euglena 

 piscifarmis. There is a single parietal laminar chloropla.st (or two), with a 

 large distinct pyrenoid on each side at the posterior third. Stigma small; 

 flagellum long; no paramylum rods or granules. Not common, but I lia\e 

 known gatherings where it wa,s plentiful. 



