Human Anatomic Variation

You've all heard of Gray's Anatomy?

Well what about an atlas of deviant anatomy -- anatomy that is out of the norm?

Here is an online book that gives variations on normal anatomy -- Illustrated Encyclopedia of Human Anatomic Variation

Look up a normal anotomical body part, and it will describe the variations that can occur.

There is also a wonderful section on the History of Sectional Anatomy
and some wonderful illustrations such as this one showing deviations of fingers and thumbs. There are may historical references and pictures to enjoy.