'^iT's'i Hardy, AlgcB of the Zoological Gardens, Melbourne. 91 



In Januar}^ 191 1, Ankistrodesmus quaternus had diminished, 

 and Scenedesmiis quadricaiida had become premier. This 

 latter species was not in normal quadrate series, as before, but 

 was, with few exceptions, in binate form, both cells bearing the 

 spine-hke processes characteristic of the type. Pediasinim 

 was again present, but rare, as was also Scenedesmus obliquns, 

 then noticed for the first time in that locahty. Merismopedia 

 was less evident, and Naviciila, spp., were sparsely distributed. 

 One collection, unfortunately not dated, shows Sc. obliquns to be 

 the principal constituent, almost to the exclusion of others. 



In May, 191 3, the meteorological conditions were much 

 different from those of preceding dates given. Instead of 

 calm, sunny days, there were chill winds ; intermittent cold 

 showers freshened the water surface, and there had been 

 little sunshine for days past. The Flamingo Pool water was 

 still green, but held little of the algse previously observed, 

 while the abundance of rotifers, &c., was a prime feature. 

 Param(xcia and other " animalcules " were frequent. Palmella 

 had taken the place of the previously dominant Scenedesmus 

 and Ankistrodesmus. For the first time in this locality, 

 Euglena spirogyra was seen, and the present noting constitutes, 

 I believe, the first record for Australasia and the Southern 

 Hemisphere generally, though doubtless the species has been 

 seen by members of the Field Naturalists' Club in other places 

 and by observers in other vStates. Only a few individuals 

 were noticed in the small sample examined, and these were 

 typically solitary and slothful, and with contortion less 

 Euglenoid than E. viridis. The eye-spot was distinct, the 

 anterior and posterior extremities hyaline, and the flagellum 

 so indistinct as to escape observation even with such aids as, 

 at other times, made plainly visible the flagellum of E. viridis 

 or E. rnbra."^ The spiral ridges or folds were distinct, and had 

 the effect of occulting the green interior in such a way as to 

 give the appearance of spiral green chromatophores, whence, 

 presumably, the specific name. In the several specimens, two 

 large amylaceous bodies were present — one in the midst of the 

 anterior half ; and one in the midst of the posterior coloured 

 part of the organism. The occurrence of E. spirogyra is con- 

 veniently recorded here without any thought of claiming the 

 organism as an alga. Ankistrodesmus falcatus, var. acicularis, 

 was also present, but scarce, and in one specimen the chloro- 

 plast was fragmented and parietal. At this period the Palmella 

 formed the bulk of the flora of the Crane Pool, and its principal 

 constituent where the great amount of surface scum was 

 almost exclusively composed of this plant. In this pool, the 



* Vict. Nat., March, 191 1, p. 215. 



