An Outline of the Relations of Animals to their Inland Environments

Abstract

In the present brief paper I have attempted to discuss only certain phases of the problem with the idea of emphasizing the general principles involved, and in the hope that it may aid in making these conceptions of more practical value in investigation, and also facilitate an understanding of the discussion contained in a report on the invertebrates of the Charleston (Illinois) region, to appear in a subsequent paper of this volume of the Laboratory Bulletin.