100 МВ. G. 5. WEST ON THE FRESHWATER ALG 
which it differs in its slightly thicker vegetative cells, its larger oogonia and 
oospores, and in its internal antheridia. The oogonia are developed in a 
very similar manner and in the same part of ihe filament as those of 
(Е. Borisianum. 
NorkE.—Sterile species of GZdogontwm were observed from the following 
localities :—Nyasa. In swamp, Kota Kota (20 June, 1904; no. 18) ; in 
swamp, Karonga (2 July, 1904 ; no 84); small sp. with capitellate cells in 
the plankton of Monkey Bay (17 June, 1904 ; no. 15), and off Vahambwera 
Point (24 June, 1904 ; no. 24).—Tanganyika. In swamp, Kituta (23 Aug. 
1904; no. 72): on surface of swampy pond, Mrumbi (27 Dec. 1904; 
no. 195) ; in the plankton of Lofu Hiver (5 Oct. 1904 ; no. 124). 
Genus BULBOCIL/ETE, Ag. 
6. BULBOCHÆTE ELATIOR, Pringsh. Jahrb. i. p. 73 (1858); Hirn, т Act. 
Soc. Scient. Fenniee, xxvii. (1900) p. 321, t. 51. fig. 327. 
Crass. cell. veget. ...... 14-17 p; altit. 2-3-plo major ; 
„ 00001. ......... 41-43 и; 36-38 ш; 
„ cell. androsp. ... ws y 9u; 
» stip. nannandr.. Bhs y 23 ш; 
„ cell. antherid.... Тш; > П р. 
Tanganyika.—In swamp, Kituta (23 Aug. 1904 ; no. 72). 
Nork.—Sterile species of Bulbochwte were observed from the two following 
localities :—Nyasa. In swamp, Kota Kota (20 June, 1904; no. 18).— 
Tanganyika. Surface of swamp, Toa (10 Jan. 1905; no. 208). 
Order CHAZETOPHORALES. 
Family ULOTRICHACEZ. 
Genus ULOTHRIX, Киш. 
T. ULOTHRIX TENERRIMA, Kitz. Phye. Germ. (1845) p. 253, t. 9. fig. 1; 
Sp. Alg. (1849) p. 346 ; Rabenh. Fl. Китор. Alg. ii. (1868) p. 366 ; Hazen, 
т Mem. Torr. Bot. Club, xi. no. 2 (1902) р. 151, t. 21. figs. 3, 4. 
Crass. fil. 7°5-8°5 ш; cellulis diametro 1-12-plo longioribus. 
Tanganyika.—In plankton, surface of Lofu River (5 Oct. 1904 ; no. 124). 
Genus URONEMA, Zagerh. 
8. UnoNEMA CONFERVICOLUM, Lagerh. т Malpighia (1887), р. 518, t. 12. 
figs. 1-10. 
Crass. fil. 45-675 yu. 
