202 



EDGAR NELSON TRANSEAU 



Fig. 4. Upper part of Rockweed J^ormat ion at low tide, showing the coming in 

 of Spartina cynosuroides. Center Island. 



Fig. 5. Lower Beach on Center Island, partially protected by boulders. Lower 

 portion covered with the Spartina-cynosuroides Association, upper part destitute 

 of vegetation. At the right is the Middle Beach occupied by the Xanthium- 

 Atriplex Association. 



