
Fig. 433. Antheridium of a fern 
Left, an antheridium on the side of a prothallus of a fern; note the coiled 
spermatozoids within the antheridium (x 845). Right, a single spermatozoid of a 
fern. (Spermatozoid redrawn after Yamanouchi) 

Fig. 434. Archegonia of a fern 
Left, the enlarged base, or venter, contains an eg 
gg and above this is the ventral- 
canal cells ; right, the ventral-canal 
canal cells have begun to disorganize. (x 185) 
canal cell, while in the neck are two neck- 
cell and neck- 
