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DESMIDS FROM SINGAPORE. 167 
vise triangulares, lateribus convexis angulis leviter obtusis ; 
membrana punctata inter granula. 
Long. 34 u; lat. ad bas. semicell. 23 p; lat. apie. 18 u; lat. 
isthm. 85 p. 
The margins of this species only appear rough near the angles. 
EXPLANATION OF PLATES 8 & 9. 
a, a'=cellula vel semicellula a fronte visa. 
b= » » vertice ,, 
latere ,, 
39 » 
All the figures are magnified 520 diameters. 
PLATE 8. 
Figs. 1-3. Closterium subcapitatum, n. sp. 
4. » subtruncatum, n. sp. 
5-7, » Legumen, n. sp. 
8-9. " pulchellum, n. sp. 
10. Penium Navicula, Bréb., forma granulata. 
ll. Euastrum binale, Ehrenb., var. elobatum, Lund., forma. 
12. Cosmarium anceps, Lund., forma. 
13. » subdecoratum, n. sp. 
14-15. » trachypolum, n. sp. 
16. Penium australe, Racib. 
l7. Euastrum sinuosum, Lenorm., var. reductum, West & G. S. West. 
18-19 »  cosmarioides, West & G. S. West, var. curtum, West & 
G. S. West. 
20. » obesum, Josh., var. robustum, n. var. 
l Pare 9. 
Fig. 1, Micrasterias anomala, W. B. Turn. 
. » Móbii, nob., var. Ridleyi, n. var. 
3-4. Euastrum gnathophorum, n. sp. 
5-6 " quadrioculat um, n. sp. 
a Staurastrum decoratum, n. sp. 
9. Cosmarium urceum, n. sp. 
