We planned to cover as great an area as one antarctic season--or longer, if absolutely necessary--would permit, operating mostly in the mountain ranges and on the plateau south of Ross Sea; regions explored in varying degree by Shackleton, Amundsen, Scott, and Byrd. With frequent changes of camp, made by aëroplane and involving distances great enough to be of geological significance, we expected to unearth a quite unprecedented amount of material--especially in the pre-Cambrian strata of which so narrow a range of antarctic specimens had previously been secured.