14 
rof. Moebius remarks: —‘ The vegetative cells are 14-16 ». broad, 
do not differ from the 
m, and a 
approximately hexagonal, varying to rhombic ; whilst in other cases 
(according to the descriptions) they are spherical, and consequently do 
not fill the oogonium. The dwarf males are seated a the sup: 
porting cells, are 42 » long, have a stalk somewhat curved at the base, 
and a 2-celled antheridium.”’ 
ig. 10: Showing single and twin oogonia; a, androsporangia 
x 400. 
Hab.: Burpengary, Thos. L. Bancroft. Found in Europe and North 
America, 
? birmanicum, Wittr. Prof. Moebius places a query against 
this species, and says:—“The vegetative cells are 11-12 p thick, 5-8 
times as long ; the supporting cell is double as thick above; the oogonla 
are apical, from spherical to elliptical (36-46 ,.); the oospore (34-38 4) 
almost fills the oogonium; the dwarf males have a single-celled, long 
stalk (8-36 ,), somewhat bent beneath; the antheridium is 1-ce 
(Fig. 98). Since the spores were not wholly ripe, and the aperture 
of the oogonium was not to be seen, the determination is not certal. 
Nordstedt writes that the specimens remind him of @. birmanicum 
and @. monile.”— Berk. et Harv. 
Hab. : Burpengary, Thos, L. Baneroft. Also in the East Indies. 
imii, Cramer. Cooke's British Freshwater Alge, 
ig. 2. Oogonia single or 2-6, continuous, some 
what egg-shaped globose, opening by an operculum with a very narrow 
and scarcely distinct fissure; oospores globose, not distinctly filling 
the oogonia; male he a little slenderer than the female; sperma 
the 
part of the filament; terminal cell obtuse, or rarely shortly apiculate. 
we: Cells, female, 012-02 mm., 2 , 
: times as f 
‘011-016 mm., 2-4 times as long; oogonia, ‘03-'043 x 036-45 mm; 
oospore, *028--035 x 028-034 mm.; sperm. cell, ‘01-'015 x -006-"009 
mm.—Cooke, l.c. : 
Note of Prof. Moebius :-—« Vegetative cells 10-12 p thiek, 3-5 eee 
as long, the supporting cell not different from them, or, whet 
cogonium is apical, distended (22 » thick) ; oogonium globose-elliptical 
(27-32 » broad, 37 » long), oospore spherical (28-30). Male specimens 
North Ameri i 
sporum, Nordst, CE. moniliforme, Wittr., and monile.” 
Fig. 11: Showing oogonia x 400.—Cooke, l.e. 
Hab.: Nines Waterholes, Myrtle, Thos. L. Bancroft. Also mee 
Afghanistan, Asia, Europe, North America, and New Zealand. 
Le Clerc. Cooke’s British Freshwater Alge, 
@. Boscii, beh 
Plate LXII1., Fig. 4, Oogonia single, rarely twin, oblong: : 4 
« 
opening by a pore above the middle; oospores ellipsoid, by 2° 
So iN al a a a a Ee 
PSS Te a a ee ae 
