Desmids from Thailand and Malaysia

L. 33 "m, Bcpr. 44 #m, and I. 8.5 "m. St. 32. Europe, N. & S.America, Australia.
New to Thailand.
26. St. deiectumBr6b. Pl.37,f.9.
West & Carter 1923, 5, 7, Pl.129, f.9-12; Scott & Prescott 1961, 89, Pl.53, f.10.
L. 20-24 ptm, Bspr. 22-28.6 um, and I. 5-8.8 um. Sts. 35,47. Cosmopolitan. New
to Thailand.
27. St. dentatum Krieger Pl.40, f.7.
Krieger 1932, 197, Pl.16, f.20; Scott & Prescott 1961, 89, Pl.59, f.8 (forma).
L. 14.5 "m, Bcpr. 26.4-30 xtm, and I. 4.5-7 "m. Sts. 39,40. Indonesia (Sumatra).
New to Thailand.
28. St. diacanthum Lemaire
Prescott et al. 1982, 2:4, 183, Pl.432, f.8.
L. 25 ptm, Bcpr. 31.7 ptm, and I. 8 xtm. Sts. 36,39,41. Ceylon, Europe, U.S.A. New
to Thailand.
29. St. dickiei Ralfs f. longispinum Fritsch&Rich Pl.39, f.3.
Scott & Prescott 1961, 89, Pl.41, f.5.
L. 36.5 ptm, Bssp. 30 ptm, and I. 11 gm. St. 47. Indonesia (Sumatra). New to Thai-
land.
29a. var. circulare Turner Pl.47,f.11
West & Carter 1923, 5, 5, Pl.129, f.16; Krieger 1932, 197, Pl.14, f.15; Prescott et al.
1982, 2:4, 186, Pl.347, f.10.
L. 26.4 ptm, B. 29.5 ptm, and I. 7.5 #m. St. 23. India, Indonesia (Sumatra), Japan,
Europe, U.S.A., Africa.
30. St. dtsputatum W. & G.S.West var. sinense (LUtk.) W. & G.S.West Pl.47, f.18.
West 1911, 4, 176, Pl.126, f.19; Krieger 1932, 198, Pl.15, f.7; Skuja 1949, 157, Pl.36,
f.1,2.
L. 21-22 ptm, B. 20-24 xim, and I. 6-6.5 "m. Sts. 29,32. Burma, Indonesia
(Sumatra), Japan, Europe, S.America, Africa, New Zealand. New to Thailand.
31. St. duacenseW.&GS.West Pl.41,f.2.
West & Carter 1923, 5, 116, Pl.148, f.1; Prescott et al. 1982, 2:4, 191, Pl.395, f.6.
L. 39.6 ptm, Bcpr. 66 ptm, and I. 8.6 ptm. Sts. 31,32. Japan, Europe, N.America.
New to Thailand.
32. St. ensiferum Turner Pl.47,f.4.
Turner 1892, 109, Pl.14, f.22; Hirano 1959, Contr. 9, 313, Pl.40, f.19.
Lspr. 36 ptm, Lcpr. 50 ptm, Bspr. 30 Ltm, Bcpr. 43 ptm, and I. 13 "m. St. 19. India,
Ceylon. New to Thailand.
33. St. excavatum W.&G.S.West Pl.41,f.8; Pl.47, f.19.
West 1895, Trans. Linn. Soc. Bot. II:5, 78, Pl.8, f.42; Skuja 1949, 157, Pl.34, f.19,20;