OOPHTTA. 



145 



299. The oogone is a globular or ovoid short-stalked 

 body containing eight germ-cells. The germ-cells escape 

 from the oogone surrounded by an investing membrane, 

 which floats out through the opening of the conceptacle, 



JJf- 



FiQ. 12.— A, end of branch of a Rockweed (Fucus evanescens), natural size; 

 /, /, conoeptacles. B. magnifled section through a conceptacle, showing hairs, 

 a, 6; oogones, c; antherids, e. 



where it finally ruptures and sets the germ-cells free {II, 

 Fig. 73). The antherozoids, which are liberated at about 

 the same time, gather around the inactive germ-cells in 

 great numbers, and by the vigor of their movements some- 

 times actually give them a rotary motion {HI)' The re- 



