Snail.

This little chap was hanging about in the garden early this morning. I don't know how his shell got damaged but it wasn't my fault, honest guv.

I'm no expert on such animals and I only have a general identification guide. This snail seemed quite small to me, less than 2 inches long overall and my uninformed guess is that it is either a Cellar Glass Snail or a Garlic Glass Snail. Apparently the latter gives off a garlic smell when irritated. I expect this would be a good thing in France if one was contemplating eating it!