

CYLINDROCYSTIS. 



189 



Certain of the aplanospores of M, 



produced poles. One of these spores is figured on PI. x (fig. 18). 



peculiar annular thickenings around the 



St 



species of Mougeotia were observed from Vizagapatam (No. 17916) and 



Kayauktaga (No. 22124) 



Family: DESMIDIACE£. 



Genus: Gonatozygon De Bary 





26. Gonatozygon monot^nium De Bary in Rabenh. Alg. 1856, No. 539; W. 



& G. S. West, Brit. Desm. 1904, p. 30, t., f. i-7; t. 5, f. 5. 



G. Ralfsii De Bary, Conj. 1858, p. 76, t. 4, f. 23-25. 

 Lat. cell. 9-U-5«(. 



Hob.— Momauk, east of Bhamo (No. 21551). Mansang near Hsipaw (No. 24193). 

 Between Thingan-nyi-naung and Kawkareik, in the side channel of a stream 

 (No. 24483). 



Var. pilosellqm Nordst. in Wittr. & Nordst. Alg. Exsic. 1886, No. 750- 

 fasc. 21, p. 48; W. & G. 8. West, 1. c. p. 31. 



Forma Minor. Long. cell. 120/*; lat. o-Ofi. 

 Hah. — Mansang near Hsipaw (No. 24193). 





Gtonatoz?gon Kinahani (Arch.) Rabenh. Flor. Enron. Alg. iii, 1868, p. 156; 

 W. & G. S. West, 1. c. 1904, p. 35, t. 2, f. 1-3. 



Lat. cell. 13-14/*. 



Hab. — Backwaters of the Irrawaddy at Bhamo (No. 21502). 



Genus: Cylindrocystis Menegh. 





28. Cylindrocystis Brebissonii Menegh., 1838; W. & G. S. West, Brit. Desm. 



1904, p. 53, t. 4, f. 23-32. 



Penium Brebissonii Ealfs, 1848. 

 Hab. — In the Kan-gyi at Mudon (No. 24505). 





29. Cylindrocystis pyramidata W. & G. S. West, Fresh w. Alg. Ceylon, 1902, 



p. 134. t. 18, f. 1, 2. 



Forma variabilis, ceilulis diametro usque ad duplo longioribus. Zygospora oblongo- 

 ellipsoidea, glabra. 



Long. 36-49/*; lat. 22-26/*; lat. constrict. 21*5-25/* ; long, zygosp. 42/*; lat. 





• 



zygosp. 31/*; (PI. xm, figs. 3, 4). 



Bab. — Spring on the river bank at Bhamo (No. 21501 ). 



30. Cylindrocystis subpyramidata W. & G; S. West, Freshw. [Chloronhy. Koh 



Chang, 1901, p. 162, t. 2, f. 8-11. 



Long. 27a*; lat. constrict. 15*5/*. 



Hab. — In the Kan-gyi at Mudon (No. 



