265 
Algal Flora of the Tropics. 
(vii) The Oedogoniaceae in the Tropics. 
It has already been pointed out above that the species of Oedogonium 
found in the fresh waters of the tropics are prevalently narrow forms. This 
fact is very striking if we examine the literature. Thus the following 
species have filaments, whose diameter is 10 p. or less 1 : — 
A. 
1. 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
r 3 - 
14. 
i5* 
16. 
* 7 - 
18. 
19. 
20. 
21. 
Oedogonium angusiissimum , W. and G. S. West (1-8-2 \i ) : — West and 
West, ’97 a, p. 6. 
„ Aster , Wittr. (7-5-8 \i ) : — West and West, '02 b, p. 128. 
,, cryptoporum , Wittr. (5-7-5 /x) : — West and West, ’02 a, 
p. 158 ; West and West, ’97 a, p. 4. 
„ cryptoporum, Wittr., var. vulgare, Wittr. (6-5-10 j ) : — West 
and West, ’02 b, p. 127. 
„ elegans, W. and G. S. West (6-8-5 A 1 ) - — West and West, 
’02 b, p. 128. 
„ excisum, Wittr. et Lund (3-5-— 5*5 j) ' — Nordstedt, ’ 80 , p. 13. 
,, Franklinianum , Wittr. (8—1 2 yu.) : — Mobius, ’ 93 , p. 118; De 
Wildeman, ’00, p. 51. 
,, gracillimum , Wittr. et Lund (6-5—7 : — West and West, 
’97 a, p. 4 (f. major). 
„ Howardii , G. S. West (7-5-11 j) : — West, ’ 04 , p. 281. 
,, Itzigsohnii , De Bary (4-8— 5*7 j) : — West and West, ’97 a, 
p. 4 (var. minor). 
„ longicolle , Nordst. (4-6 j)\ — West and West, ’02 b, p. 128; 
Nordstedt, ’ 78 , p. 20; Lemmermann, ’ 05 , p. 633. 
,, longicolle , Nordst., var. f 3 . senegalensis, Nordst. (5-7-5 j ) : — 
Nordstedt, ’ 80 , p. 13 ; Lagerheim, ’ 93 , p. 155 ; West 
and West, ’02 b, p. 128 ; Schmidle, ’ 95 , p. 294. 
,, mammiferum , Wittr. (7-5 : — West and West, ’97 a, p. 5 
(sub O. huillense , W. and G, S. West). 
,, obsoletum , Wittr. (9-15 j): — Lemmermann, ’ 05 , p. 633. 
„ Petri , Wittr. (5-8 g): — West and West, ’02 b, p. 127. 
„ platygynum, Wittr. (5-5-7 fj) : — West and West, ’02 b, p. 127. 
„ pusillum , Kirchner (3-8 j ) : — Lemmermann, ’ 06 , p. 160; 
Lagerheim, ’ 93 , p. 155 (sub O. africanum , Lagerh.). 
„ pyrulum , Wittr. (8-11-5 j) : — West and West, ’02 b, p. 127. 
„ reticidatum , W. and G. S. West (7-5-8 : — West and West, 
’02 b, p. 129. 
„ Rothii (Le Cl.), Pringsh. (8-5-10-5 j) : — West and West, 
’97 a, p. 5 (f. major)) Zeller, ’ 73 , p. 188. 
„ rugulosum, Nordst. (4-5-8 n) : — Lagerheim, ’93, p. 155. 
1 This list has been revised according to Hirn’s monograph (Act. Soc. Scient. Fennicae, t. xxvii, 
No. 1, 1900; and t. xxxiv, No. 3, 1906). The measurements are taken from the actual records, 
wherever they were given ; otherwise from Him. 
