In his interesting and excellent Voyage of the Discovery Captain R. F. Scott speculates on the former ice conditions of the Ross Sea and the adjacent ice formations. He regards the views he expresses on this subject as only speculations, so I trust that I shall not be considered ungenerous if I attempt to express what I understand to be his views, and then subject them to criticism. It may be that I have misunderstood Captain Scott. If this should be the case the method of treatment proposed will prevent confusion.