— 165 — 
Lat. 90; apicibus 442 4 inter se distantibus. 
In slagnant water amongst Spirogyra decimina var. 
Area: Europe, N. and S. America, W. Indies, India, Central China, Japan, 
New Zealand, Australia, and Samoa (var.). 
29. (. Diane Ehrenb.; Ralfs lc. p. 168, t. XXVHI, f. 5. 
Lat. 21; apicibus 263 » inter se distantibus. 
With the preceding species. 
Area: Ubiquitous. 
30. C. parvulum Nag. Gatt. einzell. Alg. 1349, p. 106, t. VIC, f. 2. 
Lat. 10,5; apicibus 130—144y inter se distantibus; diam. zygosp. 
33 yu. 
In stagnant water among other Desmids (with zygospores). 
Area: Ubiquitous. 
31. €. ealosporum Witir. in Nova Acta Soc. Scient. Upsala, ser. 3, 
VI, 1569, p.23, t. 1, f. 11. 
Forma: lat. 7—7,5 apicibus 87—89 y» inter se distantibus. 
This plant, which occurred in great abundance in stagnant water in 
the jungle, differs from typical Cl. calosporum in being a little narrower, 
the ventral margin having precisely the correct curvature. 
Area: Europe, Ceylon. 
32. (. Venus Kiitz. Phyc. German. 1845, p. 130; Ralfs Brit. Desm. 
1848, p. 220, t. XXXV, f. 12. 
Lat. 7 4; apicibus 51 y inter se distantibus. 
In stagnant water. 
Area: Europe, N. America, Burmah, Ceylon, Central China, Japan. 
33. (. Jenneri Ralfs Brit. Desm. 1848, p. 167, t. XXVIII, f. 6. 
Forma minor, membrana plerumque luteo-brunnea. 
Lat. 8,5—9 »; apicibus 55—60 y inter se distantibus. 
Numerous examples of this small form were observed and almost 
all of them possessed a yellowish-brown cell-wall. The proportion and 
relative curvature were exactly those of Cl. Jenneri Ralfs. 
Area: Europe, N. America, E. Africa. 
34, (, Cynthia De Not. Desm. Ital. p. 65, t. VII, f. 71; Cooke Brit. 
Desm. p. 26—27. 
Lat. 10,5 ps apicibus 82 inter se distantibus. 
In muddy ricefields. 
Area: Europe, N. America, E. Africa, Ceylon, Sumatra, New Zealand and 
Australia. 
