134 MESSRS. W. WEST AND G. S. WEST ON 
Genus CyvrrNDROCYsTIs, Menegh. 
44. CYLINDROCYSTIS MINUTISSIMA, W. B. Turn. in K. Sv. Vet.-Akad. Handl. xxv. 1893, 
no. 5, p. 16, t. 1. fig. 24. 
Long. 12-144; lat. 6:5-7:5 u; lat. constrict. 5:3-5:6 n. 
Hab. Paddyfields, Heneratgodha. 
45. CYLINDROCYSTIS ANGULATA, West & G. S. West, ‘N. Amer. Desm., Trans. Linn. 
Soc., ser. 2, Bot. vol. v. 1896, p. 237, t. 13. figs. 25, 26. 
Long. 74; lat. 314; lat. apic. 14:5 u. 
Hab. Among Spirogyra sp. in the little muddy backwaters, Mahawelli Ganga. 
46. CYLINDROCYSTIS PYRAMIDATA, sp. n. (Pl. 18. figs. 1,2.) C. parva, 14-plo longior 
quam lata, leviter constricta ad medium; semicellule ovato-pyramidate, polis 
late rotundatis; membrana glabra; a vertice vise circulares; pyrenoidibus singulis 
conspicuis. 
Long. 345-37 a; lat. 22-25; lat. constrict. 21-22°5 u. 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. On rocks and also 
among Podostemons, Mahawelli Ganga. 
Genus PENIUM, Bréb. 
47. PENIUM Dierrus, Bréb. in Ralfs, Brit. Deem. p. 150, t. 25. fig. 3. Closterium 
lamellosum, Bréb. Peniwm lamellosum, Kuetz. P. navigium, W. B. Turn. in 
K. Sv. Vet.-Akad. Handl. xxv. 1893, no. 5, p. 17, t. 1. fig. 9. 
Hab. Paddyfields, Heneratgodha. Paddyfield between Kosgoda and Urahaighasma- 
hendai. 
Var. constrictum, West, in Journ. Linn. Soc., Bot. vol. xxix. 1892, p. 127. 
Long. 420 4; lat. 65; lat. med. 62 u. 
Hab. Paddyfield between Kosgoda and: Urahaighasmahendai. 
48. PENIUM LANCEOLATUM, W. B. Turn. in K. Sv. Vet.-Akad. Handl. xxv. 1893, no. 5, 
pP 17, © 5. or 
Var. SUBCYLINDRICUM, var. n. (PI. 18. fig. 5.) Var. cellulis paullo longioribus, lateribus 
subparallelis subito attenuatis prope apices, apicibus rotundo-truncatis, constrictione 
mediana angustiore. 
Long. 1944; lat. max. 35 p; lat. apic. circ. 15; lat. isthm. 30 y. 
Hab. Paddyfields, Heneratgodha. 
This variety is distinguished from Penium Clevei, Lund., by the different form of its 
cells and by the absence of the small apical granulations. 
