268 RECORDS OF THE BOTANICAL SURVEY OF INDIA. 
NOSTOCHACEAE. 
Genus Anabaena Bory. 
7. A. oseillarioides Bory, 1822, Forti in De Toni, Syll. Alg. 5, 1907, p. 451. 
Hab. In rice field near Sadiya (32683). ; 
Genus Microchaete Thur. 
8. M. uberrima sp. nov. Pl. I, figs. 1-3. 
Filis elongatis, usque 5 mms. longis, absolute cylindraceis, basi breviter 
decumbentibus, stellato-fasciculatis, trichomatibus bruneolis, diametro — 
10-14 p, cellulis plerumque subquadratis, vaginis solidis diametro 16-18 Ys 9 
fuscescentibus, heterocystis basalibus intercalaribusque, his cylindraceis, — 
illis sphaericis vel leviter depressis, sporis longe seriatis olivaceis, quadratis 
vel subcylindricis, 4 
Hab. Sadiya, in ditch at edge of rice field (32683). 
Forma minor n.f, PL. I, fig. 4. 
Filamentis gracillioribus, diametro 9-11 w, trichomatibus diametro 6° 7 
pu. 
Hab. With the typical form (32683). a 
This species occurred in great quantity amongst Spirogyra and Oedogonium 
spp. It was forming spores in great quantity, entire filaments being so trans- 
formed at once (PI. I, f.2). The spores had a very distinct wall 
SCYTONEMACEAR, 
Genus Plectonema Thur. 
9, P. Thomasianum (Kiitz.) Born, 
p. 155; Forti in De Toni Syil. Alg. 5, 1907, p. 490. 
some years and could not be Testored to a, satisfactory condition, 
