396 THE ZOOLOGIST. 
the cone, while the surface is covered by numerous spermatozoid 
mother-cells (s m, sm) representing the grains of maize. Before 
the antheridium is ripe the latter are polyhedrical ; but afterwards 
they assume a round shape, as the drawing shows. All parts of 
the male organ are colourless; the antherozoid mother-cells are 
filled by a fine granular plasma, which is soon differentiated into 
around body, and subsequently discharged from the mother-cell 
as an antherozoid (ss). Thus within a short time the ripe 
antheridium discharges some 400 to 800 spherical anthero- 
zoids into the surrounding sea-water. The single antherozoid 
is a little globule of protoplasm, without cell-wall or any loco- 
motive organ. In the centre of this globular primordial cell a 
strong magnifying power shows a little nodule which strongly 
refracts light, and round which a few smaller colourless plasma- 
granules are grouped. As it freely floats in the water, the 
antherozoid is analogous to a pollen-grain of an anemophilous 
phanerogam. 
The female reproductive organ of Polysiphonia subulata is 
a polycellular carpogonium of relatively high differentiation. 
