Micyrospwa] v. ULOTRiCHACEiE (West). 335- 



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

 growing very greatly in thickness hy the addition oi: lamellae on each 

 side. The filaments do not appear to break up in the manner of 

 other species of Microspora and Confei-va. 



5. M. fontinaUs De Toni, Syll. Alg. 230 (1899); W. et G. S. 

 West in Journ. Bot. 1897, p. 34. 



Conferva fontinaUs Berk. Glean, t. xiv. fif;. 1. A variety agree- 

 ing with var. ochracea Zanard. in the relative length of its cells, 

 but occurring in dark green masses. 



Lo.VND.v. — In aquis puris stagnantibns subsalsis urbis Loandss ; 

 June 1858. No. 198. Also drawn up from the bottom of the pit at 

 Welwitsch's house in Loanda, a well which hardly receives the light- 

 of day through a narrow slit in the cover ; April 1859. No. 145. 



VI. CHROOLEPIDACE.^. 



1. TEENTEPOHLIA Mart. (1817). 



1. T. lagenifera Wille, in Pringah. Jahrb. xviii. 427 (1887); 

 W. et G. S. West in Journ. Bot. 1897, p. 35. 



Chroolepua lagenifervmi Hildebr. in Bot. Zeit. 85, t. iii. (1861). 

 G-OLUXGO A,LTO. — Inter Scytonema hmgne ad rupes rivul. Coango- 

 humect. ; June 1856. No. 140. 



2. T. phyUophila W. et G. S. West in Journ. Bot. 1897, p. 35. 

 GoLUNGO Alto. — Ad folia plantas acaulis monoootyl. (Draccena 



monostachya Baker [confer Herb. Welw. No. 3747]) in Mata de 

 Quisucula, prope Bango ; July 1867. No. 148. 



The green contents entirely fill the cells when living, but when 

 dry they contract into a double-cone-shaped or dumb-bell-shaped 

 mass in each cell. The brarches rarely bear branchlets, except 

 very short ones consisting of one or two cells. The species which 

 most nearly approaches it is T. tenuis (Zell.) De Tool, from which 

 it differs in its green colour, in its rather smaller size, in the equal 

 thickness of its primary filaments and branches, and in its obovate 

 zoogonidangia. 



Forma subnana, fuscescens, cellulis paullo tumidis ; crass, fil. 

 5-6 ft,. {I.e.). 



GoLUNGO Alto. — Ad musconim surculos (Calyptotheciuvi) in rupi- 

 bus juxta rivulos de Zengas do Queta ; July 1856. No. 143. 



VII. CLADOPHORACE^. 



1. RHIZOCLONIUM Kutz. (1843). 



1. R. crassipellitum W. et G. S. West in Journ. Bot. 1897^ 

 p. 35. 



Loanda. — In terra humida umbrosa locis cultis ; with cultivated 

 plants in earthenware pots (em vasos de barra) at Museque Lopes in 

 the island of Loanda, Aug. 1868. No. 205. 



This species is characterised by its terrestrial habit, its very thick 

 cell-walls, and the absence of rhizoids. 



