Fig. 306.
Section of antheridia
showing sperm cells,
and spermatozoids in
the one at the right.
Fig. 307.
Different views of
spermatozoids; in
a quiet condition;
in motion
(Adiantum concinnum).
Fig. 308.
Archegonium of fern.
Large cell in the center
is the egg, next is the
ventral canal cell, and
in the canal of the neck
are two nuclei of the
canal cell.
Fig. 309.
Mature and open archegonium of fern (Adiantum cuneatum) with spermatozoids making their way down through the slime to the egg.
