262 



BOTANY. 



rounded into an oosphere. Each antheridium now devel- 

 ops a tubular beak-like process, which penetrates the oogo- 

 nium (J, Fig. 178), and finally reaches the oospore (c, Fig. 

 178, and Fig. 179). It appears that the contents of the an- 



V 



58X if U^^'^*» ' 



Fig. 180.— (7y«/op«s candldns. A, mycelium, with yotins; oogoniaj Off. S, oogoni- 

 um, og ; 08. oospore ; an. antlicridium. C. mature oogonium, 0,(7, witii ooppore, os ; 

 at the left, is the remnant of the mitheridium. D, mature oospore seen in section. E. 

 beginning of germination of oospore, the endospore i with its contents escaping 

 through a rent in the epispore (or exoepore). F^ the endospore i filled with swarm- 

 spores (zooppores) rt-sting on ttie empty epispore. ff, swarm-spores (zoospores), each 

 with two cUia. x 400.— After De Bary. 



theridium pass into the oosphere, as in a short time the 

 former is found to be empty, while the latter becomes envel- 

 oped in a cell- wall, and thus becomes an oospore. In the 

 process of fertilization there are no spermatozoids, and the 



