126 AUSTUALIAX FRESHWATEE FLAGELLATES, 



above, narrowed g:radually beneath, and furnished with a short sharj) tail. 

 Membrane with 4 — 7 spiral corrugations wound I'roni left to rin-ht. 



Genus L E p o C I X c L I s Pert.v. 



Lepocixclls Ovum (Ekr.) Lemui. (Text-tig. 3a). 



Long. 23—30, lat. 17—21. long. caud. 2— lO/x. 



Guildford; Lisuiore (242, 299). 



Syu. Enylena uviim Ehr., CliUiruiieltis ocinn Stein. This species is rather 

 rare here, i liave only met with a few isolated specimens. In sliape the type, 

 accoriliug to Stein (T. six., tig-s. 15, 10, 19, 50), is broaiUy oval-oblong with an 

 anterior prominence and a short, pointed, triangular tail, m&mbrane tiuely striate 

 spirally. I'orms found here are not infrequently more oblong than oval, and 

 often lack the anterior prominence, sometimes the tail as well. I might remark 

 that these are generic characteristics in Lepocinclis; it is no use founding species 

 on their presence or absence. 



\av. AUSTiiALis^ n.var. (Text-%. 3 b, c). 



Forma oblonga, ubique rotuudata, anteriore baud produtta, postice cauda 

 obtusa l)revi' papilliformi, vcl longa Ijacillilonni, instructa. Mcrabrana delicatis- 

 sime spiraliter striata. 



Long. 23—30, lat. 17—21, lung. caud. 2— 11;^. 



Guildford (116); Lismore (328). 



A decidedlj' oblong form, rounded on all sides, with no anterior prominence 

 in the specimens so far noted, furnished behind with a short nii)pk'-sliaped tail, 

 or n'.ore larely a long, bluut-cnded. rod-like oiie. Membrane finely striate 

 spirally. 



Var. COST ATA, n.var. (Text-tig. 3(/). 



Forma oblonga, ubique rotundata. prouiiuentia anteriori nulla nee caiida, 

 Membrana costis spiralibus 9 — 10 ornata. 



Long. 24, lat. 18;^. Guildford (00). 



The oblong form, without either anterior prominence or tail, thougli of 

 course these might be present, either one or both, in other specimens, membrane 

 with 9 — 10 costae spirally wound. 



Lei'oci.vclis rusiFORMiji (Carter) Lemm. ('i'ext-iig. 3( — li). 



Syn. Euglena fusiformis Carter; Eiiglena zomdis (barter, according to 

 Kent, PI. XX., f. 58 (after Carter). The name is somewhat misleading, as one 

 expects a spindle-shaped cell to be much longer in proportion to its width than 

 this is. The type is broadly lenticular, jKiinted above and below, apparently 

 without anterior prominence or caudal prolongation of any sort, half as long 

 again as broad in our specimens, but these are not always typical. The tigure 

 of Euglena zunalis given by Kent works out at 58 X 30;^; it is probably just 

 a slightly more slender form than is typical. Our s))ecimens, wliilo being 

 generally pointed beneath (sometimes even showing a minute papilla or caudal 

 prolongation) are very rarely j)Ointed above, having at least a flattened apex 

 (lat. 3 — 4;u,) and sometimes a slight prominence of the same width. Almost all 

 forms of Lepocinclis have a pair of discus-shaped i)aramylum i)lates closely 

 appressed to the inner surface of tlie cell-wall. In this species, l)y continual 

 dcpositi(m of fresli material, these gradually grow round the cell, and meet with 

 a vertical line at each side; tho central space of each plate tills ui) at the 



