THE PLANTS OF THE SEA. 47 
endeavour to come to the surface, and is furnished with two moving 
cilia. A great number of them are contained in little transparent 
CONCEPTACLE ENCLOSING THE ANTHERIDIA. 
(Fucus vesiculosus.) 
ovoid bags (antheridia) fastened by their base upon branching and 
articulated hairs; these hairs spring from the walls of the con- 
I, INSERTION OF THE ANTHERIDIA.—2. EMISSION OF THE ANTHEROZOiIDS, 
(Fucus vesiculosus.) 
ceptacle and converge towards the ostiole, as if to guide the 
antherozoids in their exit from its cavity. The spore-cases and the 
antheridia are very often, according to the species, contained in the 
same conceptacle; or sometimes they are separated, and distinct 
conceptacles contain each. 
