124 AUSTRALIAN" FOEPH WATER FLAr.KtJ.ATES, 



Very rare indeed; more regularly oval than the type and about twice the 

 size. In all these forms the ehloroplasts are minute parietal discs scattered over 

 the central part of the cell. 



Phacus HispiDULis (Eichwald). (PI. v., fig. 4). 



Long. Corp. 30. lat. 22; long. caud. 10^. Lismore (328. 332). 



Syn. Euglena hispiihihi Eichwald; ChloropeUia hispidula Stein, T. xis., 

 f. 41-^. 



Very rare here. Tt is without the overlap at the apex, but instead is fur- 

 nished with a small papilla. The membrane is ornate with small teeth, pointing 

 backwards, disposed in longitudinal lines. The tail is straight. 



Phacus moxilata var. suecica Lemmermann. (PI. v., fig. 5). 



Long. Corp. 30—34, lat. 23—24, crass. 6; long. caud. 7— 8,a. 



Casino; Wyrallah; Lismore (241, 258, 350, 351). 



Cf. Chlonipellis monilata Stokes, p. 01, PI. i., f. 30. This species is 

 really a variant of Phacus hispiduhm, the t*etli being replaced by granules a.s in 

 many forms of Trachelomotias. I have not met with the type which is figured 

 by Stokes with granules irregularly disposed. Not uncommon here. Compare 

 Lemmei-mann (Plankt. Sehwcd. Gewa-ss, T. i., f. 15) who gives size as 36 



X -l-li^,. 



Phacus loxgicauda (Ehr. ) Dujardin. (PI. v., fig. 0). 



Long. Corp. 53 — 90, lat. 40 — 65: long. caud. ()7 — 90^. 



Botanic Gardens. Sydney (150); Guildford (45); Lismore (258, 295, 347, 

 350). 



Euglena longicauda Ehr. Our sjiecimens have sometimes very long tails. 

 Dujardin only gives 92^ u-ilh Ihe tail. This is tiie typical, flat form. 



Var. Lemmermann. (PI. v.. tig. 7). 



Long. Corp. C)2— 80, lat. 40—54; long. caud. 20— 40ju,. 



Botanic Gardens, Sydney; Wyrallah;^ Lismore (258, 260, 347). 



Syn. Ph. pleuronectes, pro parte, in Bernard, Protococc. et Desm., PI. xvi., 

 f. 561 only. This twisted variety has a much sliorter tail than the type. Lem- 

 mermann has given it a name, but I cannot lay my hand on the reference. 



Phacus triqueter (Ehr.) Dujardin. (PI. \-., figs. 8 — 11). 



Long. 38—44, lat. 25—32^. Lismore (.348, 350. 351). 



Dujardin, I.e., p. 338; Stein, T. xix., f. 55 — 57. Compare Cgclamira orbicul- 

 ata Stokes, p. 89, PI. i., f. 27; and Phacus acumhiatus Stokes, j). 90, PI. i., f. 

 28. Rather rare, it ma>- 1)C' rccogniscil by the riilge running longitudinally down 

 one face. 



Phacus ixFL.vru.s, ii.sp. (I'l. \.. lii;>.. 12, 13). 



Phacus minimus, ad Ph. plenroneciem accedens, tjuasi autem c lobis in- 

 aequalibus binis tumidis exstructis; uno lobo per longitudinem, altero transverse 

 inllafo; lobo longiorc cauda brevi pi-aedito. 



Long. Corp. 25—32, lat. 22—23; long. caud. 4— ();u. Lismore (236, 237, 295). 



A very small form something after the style of Phacus pleuroncctes, but 

 as il constructed of two inflated lobes joined down the central line. The lobes 

 are unequal in size and shape, one being longitudinally inflated, the other trans- 



