PLATE II. 



PI&. PAGE 



1. Fucus vesiculosus 42 



1 a, section of receptacle, showing spores, 

 magnified. 



2. Asperococcus Turiieri 6i 



3 a, part of frond, showing spore-clusters, 

 magnified. 



3. Laurencia csespitosa 120 



3 a, tip of branch, showing tetraspores, mag- 

 nified. 



