240 



? 



FRESH -WATER ALG^E FROM BURMA. 



261. Surirella OVALIS Bre*b. 



Var. angusta (Kiitz.) W. Sm. 



Hab. — In springs on the river bank, Bhamo (No. 21501). In the mountains east 

 of Kawkareik (No. 24450). 



262. Surirella spiralis Kiitz. 



Flab, — In stream, Lashio (No. 22557) 



Class: MYXOPHYCEiE. 



Order : HORMOGONEiE. 





Family : 



STIGONEMACKE 



Genus : Hapalosiphon Nag 



263 



Hapalosiphon Welwitschii W 



1897 



P 



242 



& G 



West, Welw. Afric. Fresnw. Alg 



• 



Crass, fil. prim. 6-7/4. 



Hab. — Mausang, near Hsipaw (No. 24193). 



The forms observed 



B 



The primary 



were not precisely like those examined from West Africa. 



were more uniform in character, and the spores were rather more angula 



ft was not observed in sufficient quantity for us to be perfectly certain of its specific identity. 



portunity of publishing figures of the original African specimens of H. Welwitschii 

 collected by Welwitsch in the Pungo Andongo district of Angola, West Africa. 



We 



take the 



(PL xii, figs. 29-32) 



Family: N0ST0CACEE. 



Genus : Nostoo Vauch. 



264 



Nostoc humifusum Carm 



ex Harvey in Hooker's Brit. Flora 



Kiitz. Spec. Algar. p. 301; Kabenh. Flor. Europ. Alg 



P 



Var. FLUITANS 



(PI 



figs. 27, 28) 



Var. thallo gelatinoso fluitante, subgloboso vel irregulariter 



compresso, dia metro l'd-5 mm 



Cra 





cell. veg. 2 



2'8/t ; diam. heterocy 



3-8m 



Hab 



Mansang, near Hsipaw (N 



This 



24193) 



van 



occurred 





abundance, free-floating among other Algae 



p. 399 



183 



bellipt 



> 



