182 



FRESH-WATER ALGiE FROM BURMA 



9 



Another interefcting feature relating to these plants was the host to which they were attached. 



Plants of this genua commonly occur as epiphytes on species of Cladophora, (Edogomum and other 



genera in which the filamenta are almost destitute of a mucous covering, tut the Burmese specimens 



were attached to one of the largest species of Spirogyra, around the filaments of which is a con- 



titrable mucilaginous envelope. 



Family: ULOTRICHACECE 



Genus : Ulothrix KiUz. 



8. Ulothrix subtilis Kiitz. Phyc. germ. 1845, p. 197; Uabeoh. Flor. Europ. 



Alg. iii, 1868, p. 365. 



Var. TBHl rrima (Kiltz.) Kirchm [Ulothrix tcnerrima Kiltz. 1. c. 1845, p. 197. "| 

 Lat. fil. 9^t. 



Ila b.— Near the river at Bhamo (No. 21 50-' J). 



Family : 0HJET0PH0RA0E& 



Genus : Myxonema Fries. 



9. Myxonema scbsecuhdum (Kiitz.) Hazen, Ulotrich. and Oha?toph. U. S 1902 



p. 207, t. 36, f. 3. ' ' 



SUfjcochnmm sub^cimdwu Kiitz. Phyc. Gen. 1843, p. 253; Rabenh. Flor. 

 Europ, Alg. iii, 1868, p. 376. 



A form with the cells 4-8 times longer than broad and with slight constrictions 



between them. Crass, fil. 13-16,,. Branches rather scarce, attenuated, and with 

 cells twice longer than the diameter. 



Ilah— Hanks and backwaters of the Irrawaddy at Bhamo (No. 21502). 



Family: MICROTHAMNIACEiE. 



Genus: Microthamnion Naar. 



10. Microthamnion curvatum sp. n. (PI. X i, figs. 14-16). 



Plant* minuta- microscopic* ramosiwimw, axe principal; non evidenti ; ramis et 



Zo um C T "'I er,UalibU f' brCVibUS Ct VaMe COnfeitis > 1-3-celluIaribus, apicibus 

 2Z2 L T 01 o "o ? We Gt gracile CUrVati8 < obt ™ s ^ eeUulfe cylindricis et 



Sous 7 r "I?"? 10 l0ngi ° ribUS; Chr ° m at °^ ri * br - ib - tenuibus et 

 panetahbus, singulis, cellulas non complentibuo. 



Crass 



veget. ram. et ramul. 16-2'2 



//«£.— Mansang near Hsipaw (No. 24193) 



H- 



occurred in abund 



.mens . taTX. The Z 7 • mar9heS "* tU *"*-'*»* locaiity , freely floating 



«n.ng other alg*. The p!aut grows m mmm t tuft, with a decidedly rounded contour, thfa 



