350 xi. desmidiace^e (West). [Cosmarium 
Var. aethiopicum W. et G. S. West in Journ Bot. 1897, p. 114. 
LlBONGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 
Forma scrobiculata W. et G. S. West, I.e. 
Pungo Andongo.— In stagnis prope Anbilla (Condo) ; March 1857. 
No. 177. 
9. C. Baileyi Wolle, Desm. U. S. 64, pi. xvi. f. 17, 18 (1884); 
\V. et G. S. West, I.e. 
G. depressum Bail., non (Nag.) Lund. 
Libongo.— Ad margines flum. Lifune ; Sept. 1858. No. 204. 
Var. angolense W. et G. S. West in Journ. Bot. 1897, p. 114. 
Huilla. — Iuter Utrieulariam, Morro de Lopollo : April 1860. 
No. 179. 
Compare with C. Baileyi v. major W. et G. S. West (in Trans. Linn. 
Soc. 2nd ser. v. 246, t. xiv. f. 36). 
10. C. pyramidatum Breb. in Ralis, Brit. Desm. 94, t. xv. f. 4 
a, b, c (1848). 
Huilla. — In paludibus exsiccandis ; April 1860. No. 176. Etiam 
inter Utrieulariam, Morro de Lopollo : April 1860. No. 179. 
Forma tropica W. et G. S. West in Journ Bot. 1897, p. 115. 
Huii.la.— Cum typ. : Nos. 176 and 179 
Var. parallelum W. et G. S. West, I.e. 
Huilla.— In editis de Morro de Lopollo ; Feb. 1860. No. 192. 
11 C. pseudopyramidatum Lund, in Nova Acta B. Soc. Scient. 
Ups. ser. 3, vol. viii. no. ii. 41. t. ii. f. 18 (1871); W. et G. S. 
West, I.e. 
Huilla. — In paludibus exsiccandis ; April 1860. No. 176. 
12. C. ligoniforme W. et G. S. West in Journ. Bot. 1897 r 
p. 115, t. 367, f. 12. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo ; May I860. No. 15 (freq. c. zygosp.). Morro de Lopollo : 
April I860. No. 182. 
This species closely resembles some forms of C. pseudopyramidatum 
Lund , but is comparatively broader with wider apices, has different 
basal angles, and the zygospore is very different. 
13. C. variolatum Lund., I.e., 41, t. ii. f. 19 (1871); W T . et G. S. 
West in Journ. Bot. 1897, p. 115. 
(«.) Forma scrobiculis numerosioribus. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo ; May 1 860. No. 15. 
Goluxgo Alto. — Inter S(yytonema Arcangelii ad muscos prope 
fontem magn. ad Banca do Sobato de Bango ; Sept. 1855. No. 159. 
(b.) Forma semi eel I alls latioribus. 
Huilla.— Morro de Lopollo ; Feb. 1860. No. 192. 
14. C. africanum W. et G. S. West in Journ. Bot, 1897, p. 115 r 
t. 368, f. 1. 
Huilla.— In paludibus exsiccandis ; April 1860. No. 176. Morro- 
de Lopollo; Feb. 1860. No. 192. 
