328 



ECOLOGY OF SALT MARSHES 



and 197 for similar marsh communities of Norfolk. Some of the 

 smaller communities, e.g. Rivularia-Phaeococcus and Gelatinous 



GlycerCetuTiL 

 Obioneian 



Asier- 



Aster- 

 SdiUcorniJi. 



5diu:orrua 



CANJV 



YNYS LAS 



I II III IV V VI VII VIII IX I II VII IX X XI XII 



195. Distribution of the algal communities in space on the Canvey and 



Fig. 



Dovey marshes. Symbols as in Fig. 194. (After Carter.) 



Fig. 196. Distribution of the algal communities throughout the year at Scolt, 

 Norfolk. (After Chapman.) 



Cyanophyceae, are apt to be overlooked in summer because the 

 constituent species shrivel up so much or else because the colonies 



