The preliminary business meeting, held usually at the first session of the Society, was postponed until Friday morning in order that the members could meet in joint session with the Geological Society of America on Thursday morning. At 12.30 the address of Dr. T. Wayland Vaughan, retiring President of the Paleontological Society, was delivered before all the affiliated societies in the auditorium of the Interior Building. As the presidential address formed the introductory paper of the symposium planned as the main feature of the meeting, an outline of its principal features is here presented.
PRESIDENTIAL ADDRESS BY T. WAYLAND VAUGHAN
This paper briefly reviews the essential principles utilized in geologic correlation, with particular reference to Tertiary deposits. After defining the geologic terms formation, member, group, and stage, the necessity of type localities for stratigraphic . . .