COLLECTED IN CEYLON, 101 
The dactyls are of very unequal length on different branchlets and the 
ultimate furcation is often fertile. In the Ceylon plants the sterile ultimate 
furcations with decidedly shortened dactyls are by no means frequent. The 
branchlets are 2-3, occasionally 4 times furcate. The plants resemble 
N. gracilis in habit, but the dactyls are uniformly 2-celled, and the ripe 
oospores (often lacking) have the characteristic netted membrane. 
NITELLA MICROCARPA, Braun in Monatsh. Akad. Berl. 1858, p. 357. 
Roadside stream near Dikwella, 9th Jan. 1898, no. 37. 
A large rather robust plant, the branchlets about 3 cm. long. The 
abbreviated dactyls characteristic of the section are by no means numerous, 
the greater number being fairly long and proceeding from fertile nodes. The 
oogonia are clustered. The oospores, which are golden-brown, are about 
250 u long, 215 broad, and show about 6 fine well-marked ridges ; the 
membrane has a very regular finely reticulate decoration. In Braun’s 
original description of the species, founded on plants collected by Weigelt at 
Paramaribo, Dutch Guiana, and by Duchassaing near Panama, the length 
of the oospore is given as '18 mm. We have not seen the former, but on a 
specimen of the latter we have measured oospores exceeding 250 y in length. 
Apparently not previously found in Ceylon. 
N. Roxgurcau, Braun in Hooker's Journ. Bot. i. (1849) p. 293. 
Tirupane, 9th Nov. 1895 (immature), nos. 18 & 19 ; Negumbo, 13th Nov. 
1895,no. 20; Tangalla, 8th Jan. 1898, nos. 38 & 39, the latter from a shallow 
tank. 
These specimens represent a large robust plant with somewhat the habit of 
Tolypella intricata, but with laxer fruiting heads; the sterile branchlets, 
which attain to a length of 4 cm., are sometimes only twice furcate, the rays 
divaricate. The plant from Tangalla, no. 39, has good ripe fruit; the 
oospore is of a dusky yellow-brown, is nearly round (length c. 250-275 y, 
breadth c. 240-275 u), and shows about 6 strong ridges. The membranes of 
this and the Negumbo plant have a fine coral-like netted decoration. Sterile 
specimens from jungle-pool, near Kandy, Centr. Prov., 5th Noy. 1895, 
no. 21, and Maradankadawile, N. Centr. Prov., 6th Nov. 1895, no. 22, both 
probably belong to this species. The former is a smaller form than any of 
the others, with much shorter branchlets and very divaricate rays. 
Apparently not previously found in Ceylon. 
NITELLA sp. (statu immaturo). 
Section (Braun & Nordstedt):—Diarthrodactyle, homoophylle, macro- 
dactylæ, flabellate, gymnocarpe. 
Tirupane, 9th Nov. 1895, no. 23. 
In the absence of fruit I have been unable to label this, but think that it 
