88 
Fig. 
Figs. 1-2. 
3-4. 
5. 
6. 
г. 
8. 
9. 
ON ALGÆ OF THE YAN ҮКАМ RESERVOIR, VICTORIA, 
PLATE 4. 
1. Mierasterias Thomasiana, Arch., var. pulcherrima, var. п. x 350. 
9. Cosmarium perfissum, sp. п. а and b, x 500; a’, x 840. 
> 
e) 
tjibenongense, Gutw., forma. х 500. 
dorsitruncatum, (Nordst.) nob. 500. 
Murrayi, Playfair. а, х 1000; b and с, x 840. 
subtriordinatum, W. A G. S. West, forma. x 840. 
Phaseolus, Bréb., forma. х 500. 
Hardyi, G. S. West. x 430. 
achondroides, sp. п. х 500. 
trachypleurum, Lund., var. subglabrum, var. п. х 500. 
quadratulum, (Gay) De Toni. х 1000. 
PLATE 5. 
‚ Mierasterias Hardyi, G. S. West. x 500. 2, basal view of semicell. 
Cosmarium tortum, Lagerh. E Nordst., forma trigona, G. S. West. x 430, 
Staurastrum mucronatum, Ralfs, var. delicatulum, С. S. West. x 430. 
Cosmarium Capitulum, Roy & Biss., var. australe, G. S. West. a, x 520; а and 
b, x 430. 
Cosmarium affine, Racib., var. evcavatum, var, n. x 840. 
Staurastrum muticum, Bréb., var. victoriense, G. S. West. x 430. 
Cosmarium goniodes, W. & G. S. West, var. subturgidum, W. & G. H. West, 
x 840. 
10. Staurastrum lerispinum, Biss., var. subbrachiatum, а. S. West. x 430. 
Staurastrum digitatum, sp. п. X 500. 11, four-rayed specimen; 12, five-rayed 
specimen. 
. Staurastrum victoriense, sp. п. X 500, 
Cosmarium moniliforme, (Turp.) Ralfs, var. //mneticum, W. & G. S. West. x 500. 
PLATE 6. 
‚ Radiofilum conjunctivum, Schmidle, X 1000. Fig. 2 is the apex of a filament to 
show the rounded apical cell. Fig. 3 shows а curious branched condition. chl., 
parietal, cup-shaped chloroplast, 
‚ Lagerheimia splendens, sp. п. 4-6, x 500; 7 & 8, x 840. Figs. 5 & 8 show the 
parietal chloroplast (cAl.). 
. Zygospore of Pleurotenium ovatum, Nordst., var. tumidum, Mask. x 220. The 
inner and middle coats have shrunk away from the outer coat, and the middle 
coat is externally papillate. 
10-12. Staurastrum striolatum, (Niig.) Arch, 10 & 11, x 550; 12, x 500, Fig. 10, 
front view of zygospore with attached semicells : fig. 11, zygospore seen from the 
side; fig. 12, empty vegetative cell, 
13. Staurastrum senarium, (Ehrenb.) Ralfs. Xx 500, 
14. 
15-16, 
patens, W. B. Turn., var, planctonicum, G. S. West, x 520. 
bibrachiatum, Reinsch, var. сутанит, W. & G. S. West. x 500. 
Fig. 15 shows an abnormal lower semicell almost identical in character with a 
semicell of S. tetracerum, Ralfs. 
17. Staurastrum assurgens, Nordst., var, victoriense, var. n. x 430. 
18, Very large form of preceding variety, x 500. 
19-90. Staurastrum evcavatim, УУ. & а. S. West, forma. x 500. 
21-22. 
22. 
Hardyi, sp. п. 21, x 840; 22, x 650. 
longiradiatum, W. & G., S, West, var, subnudum, var. n, x 500, 
