Contents

12 October 1973
Vol 182, Issue 4108

About The Cover

Destruction of porp roots of red man-grove tree was the work of an isopod crustacean, Sphaeroma terebrans, a wood borer that is causing a progressive shrinking of the Ten Thousand Islnds of the Everglades National Park off southwestern florida. See page 173. [George Morrison, National Park Service]