D. 



A, Loggerhead Key, showing bay cedars and loose calcareous sand. 



B, Loggerhead Key, western beach, northeast of lighthouse, show- 

 ing passage of beach curve from indurated material along water's 

 edge into that of loose material above it. 



C, Edge of the Everglades, near Miami, showing saw-grass. 



D, Edge of the Everglades, near Miami, showing a lily pad. 



