62 SEAWEEDS 
and being ultimately extruded, each as a motionless 
oosphere. The antheridia likewise occur in sori, 
while in Dictyota the adjacent epidermal cells 
develop an envelope surrounding each sorus of 
anes UU 
qe Saoaalewe 
“\ chee, 
TU OOHSDRAG ‘en 
ASCO SOE DORSET NEBELIOL 
ww OO soo aass 
wer 
= a) o 
Fic. 9.—Dictyota dichotoma; a, female sorus; b, male ditto; c, sporangia ; 
all highly magnified. 
antheridia laterally. The contents, after repeated 
bipartitions into numerous cells, become transformed 
into a large number of colourless, motionless, un- 
ciliated antherozoids, globular or slightly elongated, 
