284 RECORDS OF THE BOTANICAL SURVEY OF INDIA. 
Genus Penium Breb. 
109. P. Clevei Lund. Desm. Suec. 1871, p. 86, t. 5, f. 11; W. & G.S. West 
L 
e 
j—) 
114, 
= 105, 
wa 
. ©. Libellula Focke 1847. 
. C. parvulum Nag. 1849; W. & G. 8. West, Brit Desm. 1904, p. 133. 
. ©, acerosum (Schrank) Ehr. W. & G. S. West, Brit. Desm. 1904, p. 146. 
. C. abruptum W. & G. 8S. West, Brit. Desm. 1904, p. 158. 
. P. irregulare (Turn.) mihi. (Docidium irregulare Turn. Freshw. Alg. E. 
— The ‘specimens were not absolutely identical with Turner’s description, 
the apical one-third of the semicells being free from undulations, and the cell- 
Brit. Desm. 1904, p. 87. 
Long. 76 uw; lat. 25 uw; lat. isthm. 21 p. 
Hab. In ditch at edge of rice field near Sadiya (32683). 
Genus Closterium Nitzsch. 
Var. intermedium Roy & Biss. Scott. Desm. 1894, p. 252; W. & G. 8S. ; 
West, Brit. Desm. 1904, p. 74. 
Hab. In still water, Haflong (32700). 
Lat. 20  ; apicibis 157 u inter se distantibus ; lat. apic. 2 u. 
Hab. In ditch at edge of rice field near Sadiya (32683). 
Hab. Suket (26924). 
Var. angolense W. & G. S. West, Brit. Desm. 1904, p- 149. 
Hab. With the typical form (26924). 
Lat. 22 w; apicibus 190 y inter se distantibus : lat. apic. 7 u. 
Hab. In ditch near Sadiya (32700). 
€. ealsporum Wittr. Skand. Desm. 1869, p. 23, t. 1, f£. 11; W. & G. 8. 
West, Brit. Desm. 1904, p. 138. — 
Lat. 9 uw; apicibus 80 wu inter se distantibus. 
Hab. In ditch at edge of rice field near Sadiya (32683). 
Genus Pleurotaenium Nag. 
P. Trabecula (Ehr.) Nag. 1849; W. &. G. 8. West, Brit. Desm. 1904, 
Var. elavata (Kiitz.) W. & G. S. West Brit. Desm. 1904, p- 211 (Doci- 
dium clavatum Kiitz. Ralfs Brit.Desm. 1848, p. 156, t.26, f. 3). 
Hab. Non-permanent stream, Haflong in the Jatinga valley (33019). 
India 1893, p. 33.) = 
Hab. In ditch at edge of rice field near Sadiya (32683). 
fairly distinctly scrobiculate. Otherwise they were quite similar. 
