No. 



Norfolk 



Canvey and Dovey 



Table io 



Clare Is. 



General Chlorophyceae General Chlorophyceae 



la Low sandy Chlorophyceae 



lb Sandy Chlorophyceae 



Sandy Chlorophyceae 



Ic Muddy Chlorophyceae 



Muddy Chlorophyceae 



II Not investigated 



Marginal diatoms 



III Marginal Cyanophyceae^ Marginal Cyanophyceae^ 



IV Ulothrix community 



V Enteromorpha minima 



community 



U. flacca community 



E. minima-Rhizoclonium 

 community 



VI Gelatinous Cyanophyceae' 



Anabaena tonilosa 

 community 



VII Not investigated 



Filamentous diatoms 



VIII Autxmin Cyanophyceae^ Autumn Cyanophyceae^ 



IX Phormidium autumnale 



community 



X Rivularia-Phaeococcus 



Phormidium autumnale 



community 



Rivularia-Phaeococcus Rivularia-Phaeococcus 



XI Catenella-Bostrychia 



community 



XII Pelvetia-Bostrychia 



community 



XIII Enteromorpha clathrata 



community 



XIV Fucus limicola 



community 



XV Pan community 



XVI Vaucheria community 



Catenella-Bostrychia Catenella-Bostrychia 



Pelvetia muscoides 

 community 



Fucus limicola 

 association 



XVII 



^ Myxophyceae is probably preferable: see p. 278. 



