554 xi. desmidiace.-e (West). \Cosmarium 
Var. minimum W. et G. S. West in Journ. Bot. 1897, p. 119, 
t. 368, f. 6. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo ; May 1860. No. 15. 
34. C. subpyriforme Lagerh. in Botan. Notiser, 1887, 197, c. 
fig.; W. et G. S. West in Journ. Bot. 1897, p. 119. A very 
small form with rather broader bases to the semi-cells than the 
type ; other views not obtainable. 
Hun. la. — Inter Utriculariam, Morro de Lopollo; April 1860. 
No. 179. 
35. C. affine Racib. in Bosprawy Akad. Umiej. Krakow. 
W r ydzial. Mat.-przyr. ser. 2, t. ii. (vol. xxii.) 363, t. vi. f. 25 
(1892). 
Var. africanum W. et G. S. West in Journ. Bot. 1897, p. 120, 
t. 368, f. 7. 
Liijongo. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 
36. C. minutissimum Arch, in Q. J. M. S. xvii. (new ser.) 194 et 
301 (1877); Cooke, Brit, Desm. 91 ; W. et G. S. West in Journ. 
Bot. 1897, p. 120. 
Huilla. — Morro de Lopollo ; May 1860. No. 182. 
37. C. galeatum W. et G. S. West in Journ. Bot. 1897, p. 120, 
t. 368, f. 2, 3. 
HriLLA. -Morro de Lopollo ; Feb. 1860. No. 192. 
The form of this species together with its small size and the presence 
of a tooth at each basal angle easily distinguish it. 
38. C. libongense W. et G. S. West in Journ. Bot. 1897, p. 120, 
t. 368, f. 12. 
Libongo. — Ad margines flum. Lifune ; Sept. 1858. No. 204- 
This differs from C. subundulaium Wille in its shorter cells, its 
truncate apices, its crenate lateral margins, its entire absence of granules, 
and in its different vertical and lateral views. From C. subundulatum 
var. Beanlandii West it differs in its crenate lateral margin, its more 
truncate apices, in the absence of granules, and in its different vertical 
view. 
39. C. repandum Nordst. in Botan. Notiser, 1887, 162; in K. 
Sv. Vet. -Akad. Handl. Bd. 22, no. 8, 58, t. vi. f. 14 (1888); W. 
et G. S. West in Journ. Bot. 1897, p. 120, t. 368, f. 13. A form 
with the semi-cells a little dilated upwards. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo; May 1860. No. 15. 
C. odontopleurum Arch, (in R03' et Biss. in Ann. Scott. Nat. 
Hist, (1894). 169, t. ii. f. 13) appears to be only a small form of 
C repandu?n Nordst. 
40. C. multiordinatum W. et G, S. West in Journ. Bot, 1897, 
p. 121, t. 367, f. 8. 
Pungo Andongo.— In stagnis prope Anbilla Condo) ; March 1857. 
No. 177- 
This is nearest to C. decoratum W. et G. S. West (in Trans. Linn. 
