^94 



ALG.-E 



© 





A-"^^ 



H 



Fig. 259. — Volvox globator L. ^, colony-, sexual generation; a, antherids ; b, oogones ; c, 

 oospheres. B, ciliated peripheral cells. D, antherid. E, F, antherozoids. G, oogone containing 

 mature oosphere and antherozoids. H, mature oosperm. C, mode of division of parent-cell of a 

 zoosporange (all highly magnified). (After Cohn.) 



