15 
ye : a 
&. crassiusculum, Wittr. Cooke’s British Freshwater Alga 
162. Gynandrosporous. Oogonia single or twin, globose, egg-shape 
or nearly globose, opening by a pore above the middle; oospores 
Size: 027-03 mm., 33-5 times as long; oogonia, ‘054-06 x 06-'075 
mm.; oospore, ‘051-057 x °052+063 mm.; androsp. cells, -026-'028 x 
‘01-018 mm.; sperm. cell, 007-009 mm.— Cooke L.c. 
_ The following is Prof. Moebius’ description :—‘ Vegetative 
lls 352 thick, about 3 times as long; oogonia single, elliptical- 
spherical, 52 » thick, 60 » long, not wholly filled by the oospores; 
dwarf-malés on the support-cell, slightly curved beneath, 13 p thick, 
75 w long, with 1 to 2 celled antheridium.” 
_Known to occur in Europe and North America. 
Hab.: Dalby, Darling Downs ; collection, May, 1893, Dr. Thos. L. Bancroft. ° 
(Plate IV., Fig. 2.) 
€. echinospermum, 4/. Br. Cooke’s British Freshwater 
de 164. Gynandrosporous, OF idiandrosporous. Oogonia single, 
psoid-globose, or nearly globose, opening by a pore at the middle ; 
1.42 times as long; oogonia, ‘04-"05 x *042-057 mm. ; 
cospore, 038--047 x 038-049 mm.; spine, ‘003 mm. long; androsp. 
oi J 
cell, ‘021-025 x 009-015 mm. ; sperm. cell, ‘01-012 x 012-015 mm. 
ab _ times ong. gonium 
herical, about 60 « thick. Diameter of the oospore without spines 
thiesl arf-males seated upon the support-cells, 83 » long, wit 
singe antheridium. I found, moreover, only one filament with 
st nla; in one of them the oospore was unripe and seemed to 
Red; a with epiplasm, from which the spines are probably 
; Mm the other the oospore was ripe an coloured yellow. 
a4 linian » Witir.? Diceeiocine mucandrous ; oogonia 
oot rarely twin, sub-globose, opening by a pore above the middle : 
Eee hose fillmg the oogonium, membrane firm; filaments 0 
oes i ve times longer; diameter veg. me RE toe 4 
29 ; Clamet ay. -41 p; diameter 0 , 
it 94.80 eter, oogon., 26-31 pu x 29-41 p Ee a Welle, 
nj. Loebius says :—* The filaments with oogonia, which were 
~ pretty abundantly, show somewhat larger dimensions than are 
to the species, so that the determination does not appear to 
Certain. Vegetative cells 14-17 p thick, 3-5 times as long; 
