196 MESSRS. W. WEST AND G. S. WEST ON 
289. C&LASTRUM PULCHRUM, Schmidle, in Berichte Deutsch. Bot. Gesellsch. x. 1892, 
p. 206, t. 11. fig. 1; Ber. nat. Gesellsch. zu Freiburg, vii. Heft 1, p. 12, t. 2. 
fig. 10. 
Hab. Paddyfields, Heneratgodha. ^ Paddyfield between Kosgoda and Urahaighas- 
mahendai. Pond, Royal Botanical Gardens, Peradeniya. 
Genus SoRASTRUM, Kuetz. 
290. SORASTRUM SPINULOSUM, Naeg. Gatt. einzell. Alg. 1849, p. 99, t. 5 p. 
Hab. Paddyfields, Heneratgodha. 
Genus PEDIASTRUM, Meyen. 
291. PEDrAsTRUM TETRAs, Ralfs, in Ann. & Mag. Nat. Hist. xiv. 1844, p. 469, t. 12. fig. 4. 
Micrasterias Tetras, Ehrenb., 1838. 
Coenob. 4, 1-- 7, 54-11. 
Hab. Paddyfields, Heneratgodha. Paddyfield between Kosgoda and Urahaighas- 
mahendai. Pool in glen by roadside, near Bandarawella (altit. 4000-5000 ft.). Muddy 
bottom of pool at foot of Hakgala Rock (altit. 6000 ft.). In artificial tank, Peradeniya. 
292. PEDIASTRUM BoryanvuM, Menegh. Synops. in Linnæa, xiv. 1840, p. 210; Ralfs, Brit. 
Desm. p. 187, t. 31. fig. 9 a. 
Hab. ln artificial tank, Peradeniya. 
293. PEDIASTRUM DUPLEX, Meyen. Pediastrum pertusum, Kuetz. P. Napoleonis, Ralfs, 
Brit. Desm. p. 184, t. 31. fig. 7. 
Hab. Paddyfields, Heneratgodha. In artificial tank, Peradeniya. 
204. PEDIASTRUM CLATHRATUM, Lemmermann, in Plóner Forschungsberichten, 1899, 
p.20. .P. enoplon, West & G. S. West, 1895. 
Hab. In artificial tank, Peradeniya. 
Subfamily RHAPHIDIES. 
Genus SCENEDESMUS, Meyen. 
295. SCENEDESMUS BIJUGATUS, Kuetz. Achnanthes bijuga, Turp. Scenedesmus quadri- 
cauda, Ralfs, var. ecornis, Ralfs. 
Hab. Stream, Victoria Park, Colombo. 
296. SCENEDESMUS OBLIQUUS, Kuetz. Achnanthes obliqua, Turp. Scenedesmus acutus, 
Meyen. 
Hab. Paddyfields, Heneratgodha. 
