2 4 0 FBESH-WATEP AL(I,E FEOM BURMA.
2 6 1 . SDEIBELLA OVALIS B r ^ b.
Var. ANGUSTA (Kiitz.) W. Sm.
Eab.—In springs on the river bank, Bhamo (No. 21501). In the mountains east
of Kawkareik (No. 24450).
262. SUBIRELLA SPIRALIS Ktitz.
Hal.—In stream, Lashio (No. 22557).
C l a s s : M Y X O P H Y C E ^.
O r d e r : HORMOGONE^.
Family : STIGONEMAOEll.
Genus: Hapalosiphon Niig.
263. HAPALOSIPHON WELWITSCHU W. & G. S. West, Welw. Afric. Fresnw. Alg.
1897, p. 242.
Crass, fil. prim. 6-7^.
ifai.—Mansang, near Hsipaw (No. 24193).
The forms observed from Burma were not precisely like those examined from West Africa.
The primary filaments were more uniform in character, and the spores were rather more angular.
It was not observed in sufficient quantity for us to be perfectly certain of its specific identity.
We here take the opportunity of publishing figures o£ the original African specimens of S , Welwihchii
(PL xii, figs. 29-32) collected by Welwitsoh in the Pungo Andongo district of Angola, West Africa.
F a m i l y ; NOSTOCAOEi.
Genus : Nostoc Vauoh.
264. NOSTOC HDMIFDSUM Carm. ex Harvey in Hooker's Brit. Flora ii, p.
K-iitz. Spec. Algar. p. 301 ; Rabenb. Fior. Europ. Alg. ii, p. 183.
Var. FLUITANS var. n. (Fl. xn, figs. 27, 28).
Var. thallo gelatinoso fluitante, subg
compresso, diametro l ' 5 - 5 mm.
vel irregulariter subelliptico,
Crass, cell. veg. 2-5-2'8/i ; diam. heteroeyst. 3-8^.
Hab.—Mansang, near Hsipaw (No. 24193).
This variety occurred in abundance, free-floating among other Alg®.
GLFFLOTRICHIA.
F a m i l y : OSOILLATORIAOEiE.
Genus : Plectonema Thür.
265. PLECTONEMA WOLLEI Farlow in Bull. Instit. 1875, p. 77; Gomont
Monogr. des. Oscill. p. 98, t. 1, f. 1.
Crass, fil. 53-64^; crass, trich. 46-55/i,
Eab.—In swift river, Myawadi (No. 24451).
Genus: Lyngbya
266. LYSGBTA MAJUSCULA Harv.; Gomont, I, e. p. 131, t. 3, f. 3-4.
Uab.—ln the Old Lashio bazaar (No. 22598).
267. LTOGBVA MAJOR Menegh., 1837; Gomont, 1. c. p. 125, t. 3, f. 15.
Craas. trich. 13-5/x.
Mab.—Mansang, near Hsipaw (No. 24193).
268. LYNGBYA PÜTEALIS Montagne.
Fai.—Minywa, Pegu district (No. 21975).
269. LYNGBYA PERELEGANS Lemm., 1902; Vuiz Weltreise Süaswasseralo- 1904
p. 153, t. 11, f. 13, 14. °
Crase. fil. l - 8 - l ' 9 / ..
Hab.—In the Kan-gyi at Mudou (No. 24505).
Genus : Oscillatoria Vauch.
- 270. OFCILLATORIA TENUIS Ag. 1813; Gomont. 1. c. p. 220, t. 7, f. 2, 3.
Mab.—In springs on the river bank, Bhamo (No. 21501).
Family : RIVULAEIACEiEGenus
: Calothrix Ag.
271. CALOTHRIX PARIETINA Thür.
Mab.—In the Kan-gyi at Mudon (No. 24505). Forming a soft stratum with
UTOCOCCUS tropicus sp. n.
Genus : Glmtnchia J, Ag.
272. GLCEÜTKICHIA ECHIKULATA (Eng. Bot.) Richter.
Forma brevispora: crass, trich. 5-5-3^; long spor. 35-38^; lat. spor. 12'5-13M.
Mob.—Jlansang, near Hsipaw (No. 24193).
ANN. EOT. BOT. GAUD. CALCUTTA Y o i . lY.