56 
SEAWEEDS 
CUTLERIACEE 
General Characters.—The reproductive organs of 
the Cutleriacew are not borne in conceptacles as in the 
Fic. 8.—Cutleria multifida. a, 
female sorus ; 
highly magnified. 
b, 
male ditto 
Fucacee, but occur in clus- 
ters or sori among para- 
physes on the outer surface 
of the plant. The oos- 
pheres are ciliated like the 
antherozoids, which they 
greatly surpass in size. 
Fertilisation is not effect- 
ed until the oosphere has 
come to rest. There is 
also reproduction by non- 
sexual zoospores, interme- 
diate in size between oos- 
pheres and antherozoids, 
and produced in unilocular 
zoosporangia, also super- 
ficial in situation. The 
growth of the thallus is 
trichothallic, and in Zan- 
ardima the old _ fronds 
give rise vegetatively to 
new individuals by tricho- 
thallic gemme. The order 
is a small one, consisting of the genera Cutlerva 
(including Aglaczonia) and Zanardinia. 
The Thallus in both genera (exclusive of the non- 
sexual generation of Cutleria= Aglaozonia) is of 
