12 
shape, are 60-63 p broad and 56-58 p high, and are completely filled 
with the ripe oospore. The latter has a thick, compact granulated 
membrane, as is specified in the case of the epispor1um of B. setigera; 
upon the side turned towards the stem the membrane of the oospore 
is thinned at one spot. The supporting cell is divided 
the 1-2 celled antheridium. If we compare the differe 
going alga wi e usual B. setigera, we fi 
lower, vegetative cells of the latter 20 p, of the former 25-28 p 
same plants as the oogonia; the partition wall in the Australia form 
i ; _ the other 
> 
Hab.: Glasshouse Mountains, Sept., 1892. 
(Plate III., Fig. 7-9.) 
B. antea, Pringsh. Cooke’s British Freshwater Alge, 178 
Idio-androsporous? ~Oogonia rather depressed obcordate 
seated beneath terminal sete, rarely feieath 
ment of supporting cell at or a little above the mi 
verrucose; dwarf males a little longer than the oogonia, 
upon it; stem twice as long as the spermogonium, arcuate. Y 
‘024-027 mm. x 2-3 times as long; oogonia, (062-066 x '051-"058 mms 
stem of dwarf males, °011-'012 x -04-"045 mm.; sperm. cell, 013-018 
x °02-'022 mm.—Oovoke l.e. . 
rof. Moebius remarks :—‘ ‘The whole plant is 3-7 mm. high 
The membrane of the vegetative cells is clearly dotted. These dots at 
fine pores, which in optical section of the membrane are perce!’™” 
lines running thro it. The outer mouth of the pore seei” 
however, also to resemble a small wart-shaped swelling of 
membrane outwards, which seen from the surface appears as glistenl 
The oogonia form short side-byanches, or the ends of lo 
Size 
a spora In this case als ways foun “a 
tha eg upon different plants. do not bal: 
observed before, since Pringsheim remarks with regard to this s 2 
and 4 
‘ Mother-cells of the androspores upon different branches, : 
Toni in the diagnosis (Sylloge Algarum I., p. 22) sets a query 38") 
idio-androsporous, which, therefore, may well be dismissed for % 
: oa 
ma 
