294 







FIG. 259. Volvox globafor_ L. A, colony, sexual generation; a, antherids; b, oogones ; c, 

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

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

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



