346 XI. desjiidiace^e (West). 
13. E. binale Ehrenb. in Bericht. Verh. Preuss. Akad. Wissensch. 
Berlin, 208-9 (1840); Ralfs, Brit. Desm. 90, t. xiv. f. 8 (1848). 
Heterocarpella hi units Turp. (]820), Cosmarium Aitchisonii as 
figured by W. B. Turner in K. Sv. Vet. Akad. Handl. Bd. xxv. 
no. 5 (1893), t. viii. f. 54 a, b (a is oblique); non C. Aitchisonii 
Schaarschm. (1884). 
Var angolense W. et G. S. West in Journ Bot. 1897, p. 84. 
t. 366. f. 8. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo; May 1860. No. 15. 
14. E. denticulatum Gay in Bull. Soc. Bot. France, xxxi. 335 
(1884) ; W. et G. S. West 'in Journ, Bot. 1897. p. 84. 
E. binale v. denticulatum Kircbn. in Colin, Krvptog. Flora 
Schlesien. 159 (1878). 
PrjNGO Axdongo.— In stagnis prope Anbilla (Condo) ; March 
1857. No. 177. 
HriLLA. — In uliginosis editioribus prope Humpata, Empalanca et 
Lopollo ; May 1860. No. 15. 
Forma. A form with the lateral lobes partly subdivided ; 
W. et G. S. West, l.c, p. 85 (cf. W. et G. S. West in Trans. 
Linn. Soc. 2nd ser. v. t. ix. f. 16). 
Huilla. — Inter Gonatonema trqpicum, Morro de Lopollo ; Feb. 
1860. No. 186. 
15. E. tetragonum W. et G. S. West in Journ. Bot. 1897, p. 85, 
t. 366, f. 10. 
Libongo.— Ad margines flum. Lifune : Sept. 1858. No. 204. 
Compare with E. (h-ntieultitum v. rectangulare W. et G. S. West in 
Trans. Linn. Soc. 2nd ser. v. 53, t. vi. f. -21. 
16. E. bimorsum W. et G. S. West in Journ. Bot. 1897, p. 85, 
t. 366, f. 17. 
Huilla. — In uliginosis editioribus prope Humpata. Empalanca 
et Lopollo, plaeas spongiosas unacum Eriocauloneis, Xyridibus et 
Utricularm constituens ; May 1860. No. 15. 
This is very similar in outline to E. Turnerii West (in Journ. 
Linn. Soc. xxix. 141, t. xx. f. 18), but differs totally in both vertical 
and lateral views. 
17. E. suMivaricatum W. et G. S. West in Journ. Bot. 1897, 
p. 85, t. 366, f. 9. 
Huilla.— In paludibus exsiccandis ; April 1860. No. 176. 
This approaches E. divaricatum Lund, (in Nova Acta R. Soc. Scient. 
Ups. ser. 3, viii. (1871), no. ii. '21, t. ii. f. 5), but differs from it in its 
broader apex with a very shallow notch, its trilobed median wart, in 
the two quadrigranulate warts within the apex, and in the trigranulate 
wart within each basal angle, which latter feature causes the vertical 
view to be rectangular-oblong. 
10. MICRASTERIAS Ag. (1827). 
1. M. arcuata Bail, in Sruithson. Contrib. ii. Art. 8, 37, t. i. 
f. 6 (1851); Nordst, in Ofvers. K. Vet.-Akad. Forh. no. 3(1877), 
22-23, ii. 1-2 ; W. et G. S. West in Journ. Bot. 1897, p. 86. 
Huilla.— In paludibus exsiccandis ; April 1860. No. 176. 
