172 MESSRS. W. WEST AND G. S. WEST ON 
201. CosMARIUM SPYRIDION, West & G. S. West, in Trans. Linn. Soc., ser. 2, Bot. v. 1895, 
p. 64, t. 7. fig. 26. 
Long. 13 4; lat. 13:5 u; lat. isthm. 4°8 u; crass. On 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
202. CosMArium Bert, Wille, in Christiania Vid.-Selsk. Forhandl. 1880, no. 11, p. 25, 
Eim i 
Hab. Paddyfields, Pandure. Paddyfield between Kosgoda and Urahaighasmahendai. 
203. COSMARIUM SUBCOSTATUM, Nordst. in Ofvers. K. Vet.-Akad. Fórh. 1876, no. 6, 
p. 37, t. 12. fig. 13. 
Hab. Among Spirogyra sp., in fast-running stream, Peradeniya. 
204. COSMARIUM TRIPAPILLATUM, West & G. S. West, in Trans. Linn. Soc., ser. 2, Bot. 
v. 1895, p. 65, t. 7. fig. 24. 
Long. 15 u; lat. 14/5 u; lat. isthm, 3:5 u; crass. 97 u. 
Hab. Paddyfields, Heneratgodha. 
205. COSMARIUM BISCROBICULATUM, sp. n. (Pl. 21. fig. 5. C. minutum, paullo longius 
quam latum, profundissime constrictum, sinu aperto subrotundato; semicellule 
suboblong:e, lateribus rotundatis, apicibus subrectis, granulis minutissimis perpaucis 
instruct: (apicibus subglabris), in centro scrobieulo magno instructz; a vertice vise 
oblongz, polis rotundatis, in medio utrobique cum scrobiculo magno ; a latere vise 
circulares cum scrobiculo magno utrobique. 
Long. 15 „u; lat. 14 u; lat. isthm. 4 u; crass. 7 p. 
Hab. Paddyfields, Heneratgodha. 
206. COSMARIUM TAXICHONDRUM, Lund. in Act. R. Soc. Scient. Upsala, ser. 3, viii. 1871, 
p. 39, t. 2. fig. 13. 
Var. NUDUM, W. B. Turn. in K. Sv. Vet.-Akad. Handl. xxv. 1893, no. 5, p. 60, t. 8. 
fig. 64. 
Long. 42 4; lat. 42 n; lat. isthm. 11 u; crass. 22 p. 
Hab. With the preceding species. 
207. COSMARIUM PSEUDOTAXICHONDRUM, Nordst. in Ofvers. K. Vet.-Akad. Fórh. 1877, 
no. 3, p. 20, t. 2. fig. 5. Var. marginibus lateralibus semicellularum subundulatis, 
verrucis tribus infra et juxta apicem ; membrana punctulata. 
Long. 26-28'5 u; lat. 31-33 4; lat. isthm. 7:5-8:5 u; crass. 19 y. 
Hab. With the preceding species. 
The forms observed of this species greatly resembled var. africanum, West & G.S. 
West (in Journ. Bot. xxxv. 1897, p. 173, t. 367. fig. 14), only differing in the slightly 
undulate lateral margins and in the somewhat larger subapical verruce. 
