Microspora] v. ulotrichacEjE (West). 335 



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

 growing very greatly in thickness by the addition ot lamelipe on each 

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

 other species of Microspora and Conferva. 



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

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



Conferva font'malis Berk. Glean, t. xiv. fig. 1. A variety agree- 

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

 bnt occurring in dark green masses. 



LOANDA. — In aquis puris stagnantibns subsahis urbi« Loandse ; 

 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. 146. 



VI. CHROOLEPIDACE^. 



1. TRENTEPOHLIA Mart. (1817). 



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

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



Chroolepus lageyiiferum Hildebr. in Bot. Zeit. 85, t. iii. (1861). 

 GoLUXGO Alto. — Inter Sci/tonema insigne ad rupes rivul. Coango 

 humect. ; June 1856. No. 140. 



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

 GoLUNGO Alto. — Ad folia planta3 acaulis monocotyl. (Draccetia 



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

 Quisucula, prope Bango ; July 1857. 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 consi'^ting of one or two cells. The species which 

 most nearly approaches it is T. teuiih (Zell.) De Toni, 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. 



Fm^ma subnana, fuscescens, cellulis paullo tumidis ; crass, fil. 

 5-6 /A. (^.c). 



GoLUNGO Alto. — Ad muscorum surculos {Calyptothecium) in rupi- 

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



VII. CLADOPHORACE.E. 



1. RHIZOCLONIUM Kutz. (1843). 



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

 p. 35. 



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

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

 the island of Loanda, Aug. 1858. No. 205. 



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

 cell-walls, and the absence of rhizoids. 



