344 xi. desmidiace.e (West). [Tetmemwus 
Var continuus Nordst. Alg. Sandvic. 10 (1878); W. et G. S. 
West, I.e. 
Huilla. — In paludibus exsiccandis : April I860. No. 176. 
3. T. fissus W. et G. S. West in Journ. Bot. 1897, p. 81, t. 368, 
f. 25. 
HuiLLA. — In paludibus exsiccandis : April I860. Xo. 176. 
This small species has somewhat; unique characters that readily 
distinguish it from the other species of the genus. 
9. EUASTRUM Ehrenb. (1832). 
1. E. acmon W. et G. S. West in Journ. Bot, 1897, p. 81, 
t. 366, f. 11, 12. 
Huilla. — In uliginosis editioribus prope Humpata. Empalanca 
et Lopollo, plagas spongiosas unacum Enocauloneis, Xyridibus et 
Utriculariis constituens ; May I860. No. 15. 
The front view of this species is considerably different from that 
of E. intermedium Cleve, a depressed form of which it somewhat 
resembles at first sight, and the vertical and lateral views readily 
distinguish it from all Euastra of this class. 
Var. clausum W. et G. S. West, I.e., p. 82, t, 366, f. 13. 
Huilla. — In graminosis paludosis juxta rivulum de Lopollo ; April 
1860. No. 180. 
2. E. holoscherum W. et G. S. West in Journ. Bot. 1897, p. 82, 
t. 366, f. 14. 
Hxilla. — Inter Ijficrosporam abbrematam et Batrachospermum 
huillense, in rivulis prope Lopollo ; May 1860. Xo. 187- 
3. E. ansatum Ehrenb. Abhandl. Akad. Wissenschaft. Berlin 
(1831), 82 (1832); Infus. 162, t. xii. f. vi. 2 (1838); Ealfs, Brit. 
Desm. 85, t. xiv. f. 2 ;JW. et G. S. West, I.e. 
Pungo Andoxgo.— In stagnis prope Anbilla (Condo) ; March 
1857. No. 177. 
4. E. huillense W. et G. S. West in Journ. Bot. 1897, p. 82, 
t. 366, f. 15, 16. 
Huilla. — In uliginosis editioribus prope Humpata, Empalanca 
et Lopollo ; May 1860. No. 15. Etiam in paludibus exsiccandis ; 
April 1860. No. 176. 
E. ansatum Enrenb. var. turgidum Bcerg. (in Vidensk. Medd. 
Naturh. Foren. Kjoben. (1890), 33, t. iii. f. 15) is somewhat near 
this species in outline, but its dimensions and other characters are 
very different. 
■ 5. E. sinuosum'Lenorm. (1845) ; Balfs, I.e., 85, t. xiii. f. 5 a, b, c 
(1848). 
Var. reductum?W. et G S. West in Journ. Bot. 1897, p. 83. 
Huilla.— In uliginosis editioribus prope Humpata, Empalanca 
et Lopollo : May 1860. No. 15. Morro de Lopollo ; May 1860. 
Xo. 182. 
6. E. hypochondrum Nordst. in Acta Univers. Lund. xvi. no. iv. 
8, t. i. f. 11 (1880) ; W. et G. 8. West, I.e. A form with slightly 
