E 



F 



S 



^;v 





Fig. 25S. — A-F, Fucus platycarpus : A, eight egg-cells extruded from the oogonium, still surrounded 

 by the inner layer of the cell wall; B, contents of an antheridiura surrounded by the inner 

 layer of the cell wall ; C, an antheridium fixed in alcohol and stained with hEematoxylin ; D, 

 section of contents of an oogonium similarly treated and stained ; E, egg-cells set free by the 

 rupture of the inner layer of the oogonium by which they were enveloped when first extruded ; 

 F, an egg- cell with spermatozoids. G, if, Fuacs vesiculosus : G, spermatozoids fixed by a 

 solution of iodine ; H, an egg-cell with spermatozoids. (C and G x 540 ; other figs, x 240.) 



