If a chiton was picked up and turned over, there would be no eyes, legs, or arms. There would only be a wide foot with a radula that it uses for scraping surfaces. Its mantle is right under the shell, with the lowest part of the mantle coming out under the edge of the shell to help its foot grip the surfaces on which it clings or slides along. The part of the mantle which sticks out is called the "girdle". Like the moon snail, the girdle may extend out over the bottom part of the shell covering the bottom half of the chiton.