C,2 



SEAWEEDS 



and being ultimately extruded, each as a motionless 

 oosphere. The antheridia likewise occur in son, 

 while in Dictyota the adjacent epidermal cells 

 develop an envelope surrounding each sorus of 



FIG. 9. Dictyota diclwloma ; a, female sorus; b, male ditto ; c, sporangia; 

 all highly magnified. 



antheridia laterally. The contents, after repeated 

 bipartitions into numerous cells, become transformed 

 into a large number of colourless, motionless, un- 

 ciliated antherozoids, globular or slightly elongated, 



