358 xi. desmidiace/E (West) [Cosmarium 
61. C. contractum Kirchn. in Colin, Kryptoganien-flora von 
Schles. Zweit. Bd. 147 (1878); Wolle, Desm. U. S. 63, t. 16, f. 1 ; 
t. 50, f. 24 (1884) ; W. et G. L. West, I.e. 
Pungo Andongo. — In stagnis prope Anbilla (Condo) ; March 1857. 
No. 177. 
62. C. Oocystidum W. et G. S. West in Journ. Bot. 1897, 
p. 175, t. 366, f. 21. 
Hrii.L.v.— Inter Utriculariam. Morro de Lopollo : April 1860. 
No. 179. 
63. C. Cucurbita Breb. in Desmaz. PI. Cryptog. Fr. fasc. xxiii. 
1103 (1841), in ed. i. ser. i. (1825-51); Ralfs, Brit. Desm. 108-9, 
t, xvii. f. 7 (1848) ; W. et G. S. West in Journ. Bot, 1897, p. 176. 
Huilla. — In paludibus exsiccandis : April 1860. No. 176. Inter 
Utriculariam, Morro de Lopollo; April 18G0. No. 179. Morro de 
Lopollo; Feb. 1860. No. 192. 
All the African examples are more densely and minutely punctate 
than the typical plant. 
Forma minor W. et G. S. West, I.e. 
Huilla. —Cum forma typ. Nos. 176 and 179. 
Var. minimum W. et G. S. West, I.e. 
Huilla. — Cum forma typ. No. 179. 
64. C. palangula Breb. in Ralfs, Brit. Desm. 212 (1848); 
W. et G. S. West, I.e. 
Huilla. — In uliginosis editoribus prope Humpata, Empalanca et 
Lopollo ; May I860. No. 15. 
13. STAURASTRUM Meyen (1829). 
1. S. leptodermum Lund, in Nova Acta R. Soc. Scient. Ups. 
ser. 3, viii. no. ii. 58, t. iii. f. 26 (1871). 
Forma minor W. et G. S. West, in Journ. Bot. 1897, p. 176. 
LlBONGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 
2. S. tripodum W. et G. S. West in Journ. Bot. 1897, p. 176, 
t. 369, f. 11. 
Huilla. — In paludibus exsiccandis ; April 1860. No. 176. 
This species and S. xiphidiophorum Wolle are respectively simple 
and complex species of a distinct section of this genus. 
3. S. crux-alternans W. et G. S. West in Journ. Bot. 1897, 
p. 176, t. 369, f. 14. 
Huilla. — Inter Utriculariam, Morro de Lopollo ; April 1860. 
No. 179. 
This at first sight reminds one of S. inconspicuum Nordst. ; but 
it differs in its much more robust processes, which are directed 
horizontally, and have not the nodulose swelling on the under side. 
4. S. huillense W. et G. S. West in Journ. Bot. 1897, p. 177, 
t. 368, f. 17. 
Hlili.a. — In paludibus exsiccandis ; April I860. No. 176. 
5. S. egregium W. et G. S. West in Journ. Bot. 1897, p. 177, 
t. 369, f. 12. 
