— 159 — 
Var. vulgare Wittr. in Nov. Acta Reg. Soc. Scient. Upsala, 1... 
Crass. cell. veget. 5—7,5 4; altit. 3—5-plo major; 
»  oogon. 19-20; , 18—-23y; 
» oospor, 17,5—18,5 4; , 13—14y. 
In stagnant water in riverbed. 
Area: Europe, N. America and New Zealand. 
3. (. maximum West & G. S. West, n. sp. (Tab. nostr. IV, fig. 39 
—Al1,) 
(. dioicum, macrandrium; oogoniis singulis, subquadratis vel 
oblongo-rectangularibus, levissime tumidis; oosporis oogonia exacte 
complentibus, subquadratis vel oblongo-rectangularibus, in sectione 
optica verticali circularibus; membrana oospore crassa, glabra, 
quasi crassescione membrane oogonii formata; plantis masculis 
eadem crassitudine ac femineis; antheridiis pluricellularibus (?). 
Crass. cell. veget. 89—93 4; altit. 1'/2—2(usque ad 3)-plo major; 
»  oogon, (et oospor.) 105—107 4; altit. 115—136 py; 
» cell. antherid. 77—86 4; altit. 7—15 py. 
A large quantity of this Gdogonium was seen from stagnant water 
and the plants were in abundant fruit. The oospores are rather remar- 
kable being somewhat rectangular in outline, and having a wall which is 
apparently formed by an increase in thickness of the wall of the oogonium. 
Thus, when the spore is ripe there is no differentiation between the oospore 
and the oogonium, and the ripe oospores are set free by the breaking up 
of the filaments. Only one example of the antheridia was observed and 
this was only a fragment. From its general appearance it is highly pro- 
bable that the antheridia are many-celled, but this point could not be 
definitely determined. 
It may be compared with CG. fabulosum Hirn from which it is 
easily distinguished by its larger size and its differently shaped oospores, 
which completely fill the oogonia. 
4. (KE. dioienm Carter in Ann. Mag. Nat. Hist. J, no. 4, 1858, p. 30, 
t. IH, f.1,2,5—8,13—16; Hirn in Acta Soc, Scient. Fennice, Tom. XXVII, 
no. 1, 190, p.175, t. XXVIII, f. 163. (Tab. nostr. IV, fig. 42.) . 
Crass. cell. veget. 31—35 yp; altit. 3—5-plo major; 
»  oogon. 97; , 100n; 
»  oospor. 7043» 70 p. 
We place this plant under @. dioiewm Carter owing to the relative 
size of the filaments and the peculiar oogonia, which the oospores do 
not fill. It agrees with Carter’s species in everything except the length 
of the cells, which are proportionately a little longer. 
In stagnant water in the jungle, among the preceding species. 
Area: India. 
Botanisk Tidsskrift. 24. Bind. 11 
