34 



WELWITSCH S AFRICAN FRESHWATER AL.GM. 



4. Conferva L. (1737) ; em. Lagerb. (1887). 



1. C. BOMBYciNA Ag, St/st. Ahjaf. 88 ; Wille in Ofo. K. Vel.-Akad. 

 Forhandl. (1881), no, 8, 20-1. 



Forma minor Wille, I.e. 21, t. i. fig. 36-40, t. ii. fig. 55, 56 

 (1881). Crass, fil. 6 ^i. 



Pungo Andongo. Ad ramulos Podostemacearam in rivulis 

 (Casalale) ; March 1857. No. 105. 



2. C. SANDwicENSis Ag. Sijst. Altjcir. 92 (1824); Nordst. Aly. et 

 Char. Smidwic. 18, t. i. fig. 25. Crass, fil. 25 /x. 



Mossamedes. Freq. in stagnis puris ad ripas flum. Bero, inter 

 (Edogonium sp. ; Aug. 1859. No. 190. 



5. Microspora Tbur. (1850) ; em. Lagerh. (1887). 



1. M. AMffiNA (Kiitz.) Rabenh. Fl. Europ. Ahjar. iii. 321 (1868). 

 Conferva avuena Kiitz. Species Algar. 372 (1849). Crass, fil. 24-27 /x. 



Golmigo Alto. Ad rupes m flumine Luinba fluctuans ; July 

 1856. No. 203. 



2. M.WiTTROCKii (Wille) Lagerh. in i>cric/ti.Z)e»isc/i. Bot. Gesellsch. 

 V. 417 (1887). Conferva Wittrockii Wille in Of v. K. Vet.-Akad. For- 

 handl. (1881), no. 8, 20, t. i. fig. 1-11 (1881). Crass, fil. 24 [jl. 



Golungo Alto. In stagnis parvis circa Fonte de Ban^a de 

 Quilombo Quiacatubia, ast sparsim ; Jan. 1855. No. 202. 



3. M. ABBREviATA (Rabeuh.) Lagerh. I.e. 417 (1888). Conferva 

 ahhreviata Eabenb. Kn/pt. Flor. v. Sachs. 246 (1863) ; Flor. Eiirop. 

 Algar. iii. 323. Crass", fil. 8-5-10 ji. 



Huilla. Alga l?etissima viridis, lubrica, nebulosa, ad Batracho- 

 spermum Huillense in rivulis prope Lopollo ; May 1860. Nos. 187 

 and 4. 



4. M. LoFGRENii Nordst. in Botaniska Nutiser, 1882, 55. Con- 

 ferva Ldffjrenii Nordst. in Wittr. & Nordst. AU). aq. dale, exsic. 

 No. 421(1882). Crass, fil. 15-20 //. 



Huilla. In uliginosis editioribus prope Humpata, Empalanca 

 et Lopollo, i)lagas spongiosas unacuni Eriocauloneis, Xyridibus et 

 Utriculariis constituens ; May 1860. No. 15. Etiam Morro de 

 Lopollo ; May 1860. No. 182. 



Most of the plants had formed or were forming hypnospores, 

 "which when fully mature were globose or subglobose, with very thick 

 lamellose walls ; a few of these had evidently been formed from but 

 part of the contents of a cell, and were externally nodulose. The 

 cells bad a very lamellose membrane, which character is most con- 

 spicuous during the formation of the hypnospores, the filaments 

 becoming at this period more or less irregular, and the cell-septa 

 also growing very greatly in thickness by the addition of lamellte on 

 each side. The filaments do not appear to break u}) in the manner 

 of other species of Microspora and Conferva. 



5. M. FONTiNALis (Berk.) De Toni, %//. Ahj. 230 (1889). Con- 

 ferva fontinalis Berk. Glean, t. xiv. fig. 1. Crass, til. 15-17 p^; a 

 variety agreeing with var. ochracea Zanard. in the relative length 

 of its cells, but occurring in dark green masses. 



Loanda. In aquis puris stagnantibus subsalsis urbis Loandje ; 



