A Jungian view on shapeshifting and Scottish tales of the Seal people.
Two interesting articles found in the on-line edition of the Fortean Times. They're not as scholarly as they claim, but entertaining to read.
The first covers the spiritial aspects of shapeshifting stories with a Carl Jung viewpoint. The second article speculates the Seal people myths (who shed their seal skins to become people) in Scotland may have been modeled after an aboriginal sea kayaking tribe.