128 MESSRS. W. WEST AND G. S. WEST ON 
Var. oBESUM, Wittr. 
Hab. With the typical form. 
15. Gipocontum AsTrER, Wittr. in Botaniska Notiser, 1972, p. 4; Hirn, in Aet. Soe: 
Scient. Fennice, xxvii. 1900, p. 198, t. 32. fig. 202. 
Crass. cell. veget. 1:5-8 u; altit. 9-114-plo major ; 
»  oogon. 31-32:b.;  ,, 46-48 u ; 
»  Oospor. (s. spin.) 25:5-26 u; ,, 25°5-26 yn; 
Long. spin. 2 n. 
Hab. Paddyfields, Heneratgodha. 
16. G2EDOGONIUM STELLATUM, Wittr. in Ofvers. K. Vet.-Akad. Förh. 1870, no. 3, p. 129; 
Prodr. Monog. (dog 1874, p. 27, t. 1. fig. 15. 
Crass. cell. veget. 15:5-17 p; altit. 3—7-plo major ; 
»  Oogon. Ai es » Al ue; 
,  oospor. (s. spin.) 29-30°5 4; 4, 29-30y; 
Long. dent. 3-3°5 y. 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
17. GiDOGONIUM SPIRALE, Hirn, /. c. p. 201, t. 33. fig. 206. 
Var. ACUTUM, var. n. (Pl. 1%. figs. 3-5.) Var. oosporis oogonia non complentibus, cum 
liris acutis prominentibus undulatis subanastomosis 5-6 de polo ad polum spiraliter 
ordinatis, in ambitu irregulariter et acute dentatis (dentibus distantibus). 
Crass. cell. veget. 22-25; altit. 34-43-plo major ; 
,  oogon. 46-545; 4, 5460n; 
s» oospor. (s. dent.) 37-424; „ 27-424; 
,  nannandr. Put 52 u. 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
This variety is sufficiently characterized by the more prominent, spirally arranged 
ridges on the oospores. These ridges are few in number, very sharp and prominent, and 
run in undulate spirals, often coalescing, from one pole of the oospore to the other. 
18. CEDOGONIUM LONGICOLLE, Nordst. Alg. aq. dulc. et Charac. Sandvicens. 1878, p. 20, 
t. 2. figs. 11-12. 
Hab. With the preceding species. 
Var. SENEGALENSE, Nordst. in Act. Univ. Lund. vol. xvi. 1880, p. 13, t. 16. fig. 23. 
Hab. In artificial tank, Peradeniya. Paddyfields, Heneratgodha. 
19. CEDOGONIUM ELEGANS, sp. n. (Pl. 17. figs. 6, 7.) Œ. dioicum, nannandrium ; 
oogoniis singulis, depresso-globosis, prope medium cireumscissis, poro in circum- 
