Pi'otococcits] XIV. PALMELLACEiE (West). 367 



2. p. botryoides Kirchn. in Cohn, Kryptog. Flora Schles. Bd. 2, 

 Erste Halfte, 103 (1879) ; W. et G. S. West, I.e. 



Microhaloa hotryoichs Kiitz. Phys. General. 169(1843); Tab. 

 Phyc. i. (1845-9), 6, t. 7. 



LoANDA. — A light green coating on the inside of wooden water 

 reservoirs, often remaining dry, in the garden of Dr. Mendes Alfonso's 

 house ; Oct. 1858. No. 128. 



MYXOPIIYCEyE. 

 XY. RIVULARIACEiE. 



1. CALOTHRIX Ag. (1824). 



1. C. fusca (Kiitz.) Born, et Flah. in Ann. Sci. Nat. 7*^ serie,. 

 Bot. iii. 364 (1886); W. et G. S. West, I.e. 



Mastichothrix fusca Kiitz. in Phyc. General. 232 (1843). 

 PuxGO Andongo. — In Batrac.ho.yjermo gracUlimo ad lapides sub- 

 mersas in rivulo de Tangue ips. Praesidii ; May 1857. No. 3- 



2. C. breviarticulata W. et G. S. West in Journ. Bot. 1897,^ 

 p. 240. 



PuNGO AxDOXGo. — Epiphytica in Mougeotia cuigohnsi ad ramulos 

 Podostemacearum ( Tristicha trifuvia Tul. ) in rivulis Praesidii (Casalale) ; 

 March 1857. No. 105. 



The habit, together with the gradual attenuation of the filaments, 

 brings this nearest to C. adscendens (Nag.) Born, et Flah. (Z.c, 365) ; 

 but its smaller size, its shorter filaments, and its very short cells easily 

 distinguish it. The younger plants, which have only attained a 

 length of about 100 /x and a thickness of 5"5-75 fx., have their cells 

 only 2-3 times shorter than the diameter. It also comes near to 

 C. endophytica Lemmermann in Forschungsberichte Biolog. Station 

 zu Plon, iv. 184 (1896), but has a different sheath and very short 

 filaments ; the heterocysts are also very distinct. 



3. C. epiphytica W. et G. S. West in Journ. Bot. 1897, p. 240. 

 MossAMEDES. — Epiphytica in CEdogonii sp., freq. in stagnis puria 



ad ripas flum. Bero ; Aug. 1859. No. 190. 



2. DICHOTHRIX Zanardini (1858). 



1. D. olivacea Born, et Flah., I.e., 375 (1886); W. et G. S. 

 West, I.e. 



Calothrix olivacea Hooker (1845). 



PuNGO Andongo. — Inter Sc>/tonema Myochrousvar. chorograplncum, 

 in summis rupibus Prssidii ; Feb. 1857. No. 6. Etiam inter Sci/to- 

 tmma Millei ad rupes vulc. humectatas prope Cacella ips. Praesidii ; 

 Feb. 1857. No. 7- 



2. D. gypsophila Born. etFlah., I.e. 377-8 (1886) ; W. et G. S. 

 West, I.e. 



Schizosiphon gypsophilus Kiitz. Phyc. Gener. 234, t. 6, fig. 2 

 (1843). 



This seems to have been luxuriantly developed, and reached 

 5 mm. in height ; the filaments were not incrusted with lime, as 

 is often the case with this species. 



