340 X. ZTQNEMACEiE (West). \S'pirogyra 



larger zygospores ; from the latter in its somewhat thicker filaments, 

 shorter cells, the character of its chromatophores, and in its shorter 

 zygospores. 



The following may belong to this species : — - 



PuNGO Andongo. — Cellulse vegetativas diametro (63-82 ii) 1^2|-plo 

 longioribus, extremitatibus non replicatis ; chromatophoris 3 (?), 

 magnis cnm marginibus serratis et pyrenoidibus magnis. In stagnis 

 ad latera rivulorum (Oasalal^) ; Feb. 1857. No. 206 {I.e., p. 42). 



8. Spirogyrae sp., I.e. 



LoANDA. — Iq Angolse stagnis agri Loandensis, pr. Represa de M. 

 Pereira ; Feb. 1854. No. 125. 



9. S. grlindrospora W. et G. S. Westin Journ. Bot. 1897, p. 42. 

 PdnCxO Andongo.— In stagnis prope Anbilla (Condo) : March 1857. 



No. 177. 



The shortly cylindrical zygospores are very characteristic, fitting the 

 cells like pings pushed into them. 



10. Spirogyrse sp., I.e. 



GoLTJNGO Alto. — Freq. in semistagnantibus ad ripas rivi Quiapoze, 

 Caminho (road) pr. Mussengue ; Sept. 1856. No. 207. 



XI. DESMIDIACE^. 



1. GONATOZYGOW De Bary (1856). 



1. G. Ralfsii De Bary, Conj. 76-7, t. iv. f. 23-25 (1858) ; W et 

 G. S. West in Journ. Bot. 1897, p. 77. 



PuNGO Andongo. — Inter Batraahospermum gracilUmum, ad lapides 

 submersas in rivulo de Tangue ips. Prsesidii ; May 1857. No. 3. 



2. CYLINDROCYSTIS Menegh. (1838). 



1. C. crassa De Bary, Z.c.,74, t. vii. C (1858) ; W. et G. S. West 

 in Journ. Bot. 1897, p. 77. 



PuNGO Andongo.— Ad latera boreal, et occid. de Pedra Soneue • 

 April 1857. No. 12. 



3. PENIUM Breb. (1846). 



1. P. oblongum De Bary, I.e., 73, t. vii. G, f. I, 2 (1858) ; W. et 

 G. S. West in Journ. Bot. 1897, p. 77. 



GOLUNGO Alto. — Ad margines stagnorum rivi Cuango ; Aug. 1857. 

 No. 155. 



HuiLLA.— In paludibus exsiccandis ; April 1860. No. 176 Morro 

 de Lopollo ; Feb. 1860. No. 192. 



2. Penii sp. 



Long. 28 fi; lat. 11-5 ;u, ; this is probably P. Mooreanmn Arch., 

 but not seen in sufficient quantity for accurate identification (^.c). 



HuiLLA.— Inter Utriculariam cymhanthani, Morro de LonoUo • Anril 

 1860. No. 179. ^ '^ 



3. Penii sp. 



Long. 26 /a; lat. 16 /i [I.e.). 



HuiLLA.— Prope lacum Ivantala ; March 1860. No. 17. 



