In Scandinavia there have been various changes of level during the Glacial period, and some geologists of that country are of opinion that the load of ice which lay upon it affords a probable means of accounting for a depression and submergence of the land such as would lead tothe formation of those elevated beds of Arctic shells which are met with in the interior of that region. But there has been a later movement of quite a different nature, whereby the Baltic seemsto have been converted for a time into a fresh-water lake, and it is to this that I now want to draw attention, as I think the same cause which has been supposed to produce the depression affords a happy means of explaining this curious and later phenomenon also.