LIST OF FIGURES 



FIG. 



1. An Oyster Habitat on the South Carolina Coast Frontispiece 



2. Struggle for Existence on a Clam Flat. Over- 



crowded Condition facing page 7 



3. Struggle for Existence on a Clam Flat. De- 



struction of Clams by Predaceous Annuals " " 8 



4. A Small Mountain Stream as an Animal En- 



vironment ...... "86 



5. A Small River as an Animal Environment . " "87 



6. An Illinois Prairie Remnant as an Animal 



Environment " " 139 



7. An Illinois Deciduous Forest as an Animal 



Environment . " " 146 



