152 



BOTANY. 



passage of its contents into the oogone by means of a tubu- 

 lar process from the former; in other species the plants 



79.— Showing reproduction in Water-moulds. 1, 2, 3, 4, asexual repro- 

 duction ; 5 to 10, sexual reproduction ; 6 to 9 show development of oSgones 

 and antnerids. Highly magnified. 



are dioacious, and in them the antherids produce motile 

 antherozoids, by means of which the fertilization is ef- 



