THE YAN YEAN RESERVOIR, VICTORIA. D 
N. rhynchocephala, Kütz., Vanheurekia rhomboides, (Ehrenb.) Bréb., Gyro- 
sigma distortum, W.Sm., var. Parkeri, (Harris.) Cleve, Gomphonema gracile, 
Ehrenb., Coeconema cuspidatum, (Kütz.) б. $. West, Surirella robusta, 
Ehrenb., var. splendida, (Ehrenb.) Van Heurck, S. biseriata, Bréh., S. linearis, 
W. Sm. 
Myxophycez.— Oseillatoria хр. (fragmentary з probably O. Agardhii, Gom.). 
Peridinieæ.— Ceratium Hirundiuella, O. F. Müll. The forms were slightly 
different from any others I have seen. The second antapical horn was 
almost as long as the first one, and the third was of good length and curved 
inwards, (Pl. 2. fig. 15.) 
П. Littoral Ао. Те weeds at the margins of the reservoir were mostly 
Eleocharis sphacelata, R. Br., and a species of rush. Like the plankton 
the weed-collections were almost entirely Diatomaceous. The greater part 
of the material consisted of immense quantities of Tubellaria flocenlosa 
and Navicula gracilis, amongst which the following species were observed 
rather sparingly :— 
Chlorophycez.—^terile species of Oedogonium, Mougeotia, and Zygnema, 
Closterium Venus, Kiitz., Cosmarium angulosum, Bréb., С. Reynellii, Wille, 
C. impressulum, Klfy., forma suborthogona, (Racib.) nob., Staurastrum 
рудттит, Bréb. 
Bacillarieæ.—Synedra Ulna, (Nitzsch) Ehrenb., 5. Acus, (Kütz.) Grun., 
Achnanthes linearis, W. Sm., Navicula major, Kütz., N. gibba, (Ehrenb.) 
Kiitz., №. /ridis, Ehrenb., N. dieephala, Ehrenb., „У. exilis, (Kütz.), Grun., 
Gomphonema gracile, Ehrenb., Cocconema gracile, (Wabenh.) G. 5. West, 
Nitzschia Palea, (Kütz.) W. Sm. 
WALLABY CREEK WEIR. 
Plankton collections were obtained from the outlet by allowing the 
outflowing current to pass through the net for about twenty minutes at 
a time. The material contained a vast amount of organie matter and a 
quantity of fine sand. No predominating species were noticeable, but the 
following were observed :— 
Chlorophyceæ.—Sterile species of Oedogonium, Mougeotia, Zygnema, aud 
Spirogyra, Closterium prelongum, Bréb., forma brevior, West, C. Ulna, 
Focke (very elongated form ; long. 675 p, lat. 20 u), Penium margaritaceum, 
Ehrenb., var. irregularius, W. & G. S.West, Cosmarium trachypleurum, Lund., 
var, subglabrum var. n, Tetraspora lacustris, Lemm. 
Heterokontæ.— Tribonema bombycina, (Ag.) Derb. & Sol., forma minor. 
Bacillarieæ.— 7uhellaria flocculosa, (Roth) Kütz., Synedra Ulna, (Nitzsch) 
Ehrenb., Navienla radiosa. Kütz., Vanheurckia rhomboides, (Ehrenb.) Bréb., 
V. viridula, Bréb., Gomphonema gracile, Ehrenb., Surirella linearis, W. m. 
Myxophycez.— Oscillatoria irrigua, Kütz. 
