120 AUSTRALIAN FliKSHWATKIi FLAGELLATES, 



Another t'orm. however, wliieli I have found in fn'eat f|uantity, is broadly 

 strap-shaped, not at all, or very slightly, attenuate in front where it is broadly 

 truncate; behind narrowing rapidly to the short acute tail. The 

 membrane in this form is generally very rufescent. the specimens appear- 

 ing greeny-brown. I have no figure of this form, though it is very common. On 

 decomposition the skin often splits up into a wisp of longitudinal tibres, the 

 striae, which are then seen to be composed entirely of the granules, showing as 

 minute brick-shaped cylinders set on end side by side. 



Long. 160—2.50. iat. 18—36. long. caud. 25— 30;^. Sydney; Wyrallaii; Lis- 

 more. 



Forma. (PI. iv.. fig. 3). 



Cylindrical, rounded in front, and attenuate behind into a short tail. An 

 interesting form showing beyond a doubt that the membrane may be at first 

 smooth, the granules developing by degrees. Specimens indeed are often noted 

 in which every second or fourth row of granules is more strongly marked, the 

 intermediate series being of later growth. Paramylon rods link-shaped in this 

 species as in E. oxyuris. 



Var. ELEGANS, n.var. (PI. iv., fig. 4). 



Forma anguste cylindracca. fronte minime attenuata, postice in caudam 

 brevem aeutam producta. Membrana hyalina tenuissima, striis delicatissimis, 

 minute granulatis. Flagello nullo. 



Long. 110—136. Iat. 8—12, long. caud. 10—16^. Casino (223): Lismore 

 (293). 



A small and very slender cylindrical form, almost truncate in front and 

 rapidly narrowed behind. The membrane clear, delicate and very finely striate 

 with minute puncta-granules. No flagellum and no paramylon rods. On others 

 in the same gathering no granules at all could be detected. Out of mud from 

 the edge of a lagoon. 



EuGLENA .\ccs Ehr. (PI. iv.. fig. 5). 



Fusiform, subrostrate in front, very gradually attcimate ))eliin(l. where the 

 lines of the body merge uninteri-uptediy into the long, acutely pointed tail. 

 Cienerally active, with a long tiagelluui. Membrane very smooth, no striae visible. 

 A long series of 6 — 10 paramyhm rods is characteristic, though not always 

 present. 



Long. 150—210, hit. 10— 12i,t. Auburn: Lismore (258, 327). 



Cf. Stein, op. cit., T. x.x.. f. 10—12; Daugeard, I.e., p. 101. f. 22. I 

 doubt whether I have ever seen a typical specimen of this species (as distinct 

 from E. acuti.''sin>a Lemm.). The figures cited are more distinctly fusiform than 

 anything I have met with. Stein's specimens have the appeai'iuice of being 

 distorted, and the rostrate tip does not seem correct. Daugeard's figure is better 

 m this respect, but the tail is not nearly long enough to represent our forms. 

 The only difference between this and the succeeding species is the slightly 

 greater breadth and the wealth of paramylon rods. Tho chloropl.asts are often 

 little obhmg cushions. 



EUGLEXA ACI'TISSIMA Lenuncrniami. (PI. iv.. fig. 6). 



Lemmermann. Plankt. Schwed. Gewass., p. 122, T. i., f. 27, who gives long. 

 123. Iat. 7. flag. long. 25;/,. This is really a slender, more cylindrical form of 



