226 



FRESH-WATER ALGJE FROM BURMA. 



The cells of this epecies are very little broader than long, and are widest in the middle. The 

 zygospores are very characteristic, being elliptic-oblong in general shape, and exhibiting various 



irregularly-disposed protuberances. 



169. Hyalotheca mucosa (Dillw.) Ehrenb., 1840; Ralfs, Brit. Desm., 1848, p. 53, 



t. 1, f. 2. 

 Jlab. —Mansang, near Hsipaw (No. 24193). 



170. Hyalotheca undulata Nordst. in Wittr. & Nordst. Alg. Exsic, 1879, No. 248 ; 



fasc. 21, 1889, p. 33. 

 Long. 13-4-16-3/*; lat. 6-7-7-7/*. 

 Jlab.— Mansang, near Hsipaw (No. 24193). 



Genus: Desmidium Ag. 



171. Desmidium Swartzii Ag. 1824; Ralfs, Brit. Desm., 1848, p. 61, t. 4. 

 Long. 1 5-5-1 7-5/*; lat. 28-31/*. 



Jlab. — Mari9ang, near Hsipaw (No. 24193). 



172. Dksmidium Aptogonum Br£b., 1836; Rabenh. Flor. Europ. Alg. 1868, iii, 



p. 154. 



Aptogonum Desmidium Ralfs, Brit. Desm., 1848, p. 64, t. 32, f. 1. 



Var. tetragonum W. & G. S. West, Freshw. Alg. Ceylon, 1902, p. 193. 



? Aptogonum tetragonum Delp. Desm. subalp. 1878, p. 75, t. 3, f. 20-23. 



Long. 15-5-17-5/s lut. 25-31*5/*. (PI. xn, fig. 5). 

 Jlab. — Mansang, near Hsipaw (No. 24193). 



Genus: Gymnozyga Ehrenb. 



173. Gymnozyga moniliformis Ehrenb., 1840. 



Didymoprium Borreri Ralfs, 1845; Brit. Desm. 1848, p. 58, t. 3 

 Jlab.-— In springs on the river bank, Bhamo (No. 21501). 



Order: PROTOCOCCOIDE^ 



Family : CHARACTER 



Genus: Characium A. Br. 



174. Characium pyriporme A. Br. Alg. unicell., 1855, p. 40, n. 6, t. VB; Rabenh 



Floi. Europ. Alg. iii, 1868, p. 88. 



Long. cell. 27/*, cum stip. 40/*; lat. cell. 15m. 

 Jlab.— Mansang, near Hsipaw (No. 24193). 



