MOUGEOTIA. 



187 



The form of this species observed from Burma was slightly larger than usual, and the number 

 of chromatophores was generally three Tf w« a oi™™* a u i -^ • numoer 



TTnh rhnii/ in fh. r«i* p n« v\ St ldentlcal *»<* specimens examined from 



Koh Chang m the Gulf of Sxam, but the yegetatiye cells were slightly thinner. It is one of 



the commones repeal speces of the genus, and is subject to much vlatL A species d Jbld 

 by Schmidle (Algous Nyassa See, 1903, p. 76, t. 3, f. 2) 8. FuUelornei is probably referaUe 

 to A dmmm. The only difference is in the somewhat narrower chloroplasts. 



Var. plena var. n. (PI. x, figs. 6- 



Var cellulis vegetatiyis paullo latioribus et brevioribus, diametro H-2-plo 

 longionbus; zygosporis cellulas complentibus. 



Crass, cell, vegct. 38-44/s long, zygosp. 64-73/z; lat. zygosp. 40-l4 M . 



Bab. — In flooded rice-fields, Burdwan (No. 24674) 



21. Spirogyra neglecta (Hass.) Kiitz. Spec. Alg. 1849, p. 441 ; Rabcnh. Flor 



Europ. Alg. iii, 1868, p. 248; Petit, Spirogyra Envir. Paris, 1880, 

 p. ^6, t. 9, f. 1-5. 



Zygnema neglecta Hass. 

 Forma cellulis vegetativis paullo crassioribus. 



Crass, cell, veget. 66-72*; long, zygosp. 92-95/*; lat. zygosp. 62-63/* ; diam. 

 apian opor. spheric. 45-49/*. 



Bab. — Kyauktaga in the Pegu district (No. 22124). 



The specimens observed were very slightly larger than usual, but otherwise exaotly typical. 

 In some of the filaments globular aplanospores were noticed. 



22. Spirogyra maxima (Hass.) Wittr. in Wittr. & Nordst. Alg. Exsic. 1882, 



No. 460. 



Zygnema maximum Hass. in Ann. Mag. Nat. Hist. 1842, p. 36. 



Zygnema orbiculare Hass. Brit. Freshw. Alg. 1845, p. 138, t. 19. 



Spirogyra orbicularis Hass. Kiitz. Spec. Alg. 1849, p. 442; Petit, Spirogyra 

 Envir. Paris, 1880, p. 31, t. 12, f. 1-2. 



Crass, cell, veget. 121-150/*; diam zygosp. 100-120/t; crass, zygosp. circ. 82/*. 



Bab. — Near the river at Bhamo (No. 21503). 



A large sterile species, probably & maxima, was observed from Jlsipaw 

 (No. 24120). Smaller sterile species were observed from Vizagapatam (No. 17916), 

 Lashio (No. 22557) and the river Irrawaddy at Thayetmyo (No. 22999). 



Genus: Mougeotia Ag. 



23. Mougeotia laetevirens (A. Br.) Wittr. 



Craterospermum loetevirens A. Br. Alg. 1855, p. 60; DeBary, Conj. 1858, 

 p. 81, t. 3, f. 1-13. 

 Craos. cell, veget. 21-23/*; lat. spor. 32^. 

 Bab.— Kyauktaga in the Pegu district (No. 22124). 



