74 



CYCLOSPOREJ;. 



similarly set free, and fertilisation takes place in the water, 

 numerous spermatozoids collecting round the oosphere (Fig. 70 E), 

 which is many times larger, and by their own motion causing it' to 

 rotate. After fertilisation, the oospore surrounds itself with a 



& :^Mg^*fr*s! 



:f^-^&&&**r?* 





D 



F 



FIG. 70. Fttcits vesiculosus. A Portion of thallus with swimrciDg bladders (n) and 

 conceptacles (6). S Section of a female conceptacle ; li the mouth; 31 the inner cavity; 

 s ooponia. C Antheridiophore; a antheridium; y sterile cells. D Anthcridia out of which 

 the eparmatozoicls are escaping. E Fertilisation. F Germinating oospore. 



cell-wall and germinates immediately, attaching itself (Fig. 70 

 to some object, and by cell-division grows into a new plant. 



