Desmids from Thailand and Malaysia

28 M. HIRANO
ity. Station in Thailand is indistinct. Europe.
27c. var. minutum (Delp.) W. & G.S.West
28.
29.
30.
31.
32.
33.
West 1908, 3, 209; Krieger & Gerloff 1962, 75,
f.13-15.
L 22-28.5 ptm, B. 17.5-22 ptm, and L 4.5-6.5
tan.
Pl.17, f.8; F6rster 1982, 250, Pl.30,
ptm. Sts. 1,31,36,43,47. Cosmopoli-
C. controversum W.West Pl.20, f.7.
West 1911, 4, 9, Pl.97, f.7-8; F6rster 1982, 187, Pl.32, f.3.
L. 101 pt m, B. 79 xtm, and I. 35 #m. St. 21. Europe, S.America, Africa.
C. crenatum Ralfs forma boldtiana (Gutw.) W. & G.S.West Pl.21, f.14.
West 1911, 4, 37, Pl.98, f.13,14; Prescott et al. 2:3, 113, Pl.279, f.3.
L 28.6 #m, B. 20 "m, and I. 9 um. St. 47. Indonesia (Sumatra), Europe.
Ccrispatum Hirano Pl.18, f.33.
Hirano 1957, Contr. Biol. Lab. Kyoto Univ. 5, 132, Pl.20, f.39; Krieger & Gerloff
1962, 36, Pl.11, f.1.
L. 32 pt m, B. 28 ym, and I. 6.5 xt m. St. 40. Japan. New to Thailand.
C cucumis Corda
West 1905, 2, 152, Pl.59, f.18-20; Krieger & Gerloff 1962, 86, Pl.19, f.11.
L. 57 #m, B. 42 pt m, and I. 22 pt m. St. 1. Cosmopolitan.
C. cuneatum Joshua Pl.20, f.4.
Joshua 1886, Journ. Linn. Soc. Bot. 21, 647, Pl.24, f.17; West 1902, Trans. Linn. Soc.
6, 173, Pl.21, f.11; Hirano 1967, Nature & Life SE. Asia 5, 46, Pl.9, f.8.
L. 39.6-42 ptm, B. 28-45 ptm, and I. 6.5-9 um. Sts. 32,51. Thailand, Burma, Bor-
neo, Sumatra.
C. decachondrum Roy & Bisset
Roy & Bisset 1886, Jour. Bot. 24, 196. Pl.268, f.15; Prescott et al. 2:3, 120, Pl.224,
f.3.
34.
L. 32 ptm, B. 32 Ltm, and I. 8#m. St. 51. Japan, Europe, U.S.A., Africa. New to
Thailand.
C. decedens (Reinsch) Racib. var. decedens Pl.26, f.18.
West 1908, 3, 43, Pl.69, f.6-8; Krieger & Gerloff 1965, 178, Pl.36, f.10.
L. 48.4 pm, B. 21 xtm, and I. 15.4 xtm. St. 5. Burma, Indonesia (Java), Japan,
Europe, Canada, S.America. New to Thailand.
34a. var. borgei Krieger
Krieger & Gerloff 1965, 179, Pl.36, f.13.
L. 35 "m, B. 22 xtm, and I. 9 um. Lateral margins of a semicell slightly undulate,
apex retuse, apical angles rounded, sinus linearly open slightly. St. 3. Norway (Spitz-
bergen), Alaska. New to Thailand.