

Fig. 113. Arcliegonium of Pteris at the time of fertilization, showing tissue of gam- 

 etophyte (A), the cells forming the neck {B), the passageway formed by the dis- 

 organization of the canal cells (C), and the egg {D) lying exposed in the venter. 

 —Caldwell. 



Fig. 114. Anthcridiiim of Pteris {B), showing wall cells (a), opening for escape of 

 sperm mother cells (e), escaped mother cells (c), sperms free from mother cells (b), 

 showing spiral and multiciliate character. — Caldwell. 



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