THE FRESHWATER ALG OF CEYLON. 215 
Fig. 3. Staurastrum acestrophorum, sp. n. x 520. 
4. Se Cerastes, Lund., var. ceylanicum, var. n. x 520. 
5 53 approximatum, sp.n. x 520. 
6 j triforcipatum, sp. n. x 520. 
y: » subparvulum, sp. n. x 520. 
8,9. j columbetoides, sp. n. x 520. 
10-12. » indentatum, sp. n. x 520. 
13, 14. » saltans, Joshua. x 520. 
15. ap subsaltans, sp. n. x 520. 
16. $i Submanfeldtii, sp. n. x 520. 
17. j ji var. elegans. x 520. 
18. $5 cyclacanthum, sp. n. x 520. 
19. 2 galeatum, W. B. Turn. x 520. 
20. P gracile, Ralfs, var. elegantulum, var. n. X 520. 
21. Arthrodesmus phimus, W. B. Turn. x 520. 
32. 5 gibberulus, Joshua. x 520. 
23-25. Staurastrum tauphorum, sp. n. x 520. 
26. Hyalotheca mucosa, Ehrenb., var. minor, Roy & Biss. x 520. 
27. $ undulata, Nordst., forma. x 520. 
28. Spherozosma granulatum, Roy & Biss., var. pergranulatum, var. n. x 520. 
39, 30. Spondylosium compactum, sp. n. 29, x 830; 30, x 520. 
31. Onychonema uncinatum, G. C.Wall., var. subglabrum, var. n. x 520. 
32-34. Phymatodocis irregulare, Schmidle. x 520. 
35-37. Desmidium Pseudostreptonema, sp. n. x 520. Figs. 36 and 37 are the triangular form, and 
Fig. 35 is a 2-ended form. 
bo 
aa 
SECOND SERIES.——BOTANY, VOL. VI. 
