what am i?

[reneeanneb]

hello everyone i'm new here so hopefully i get this right. i found a new critter this morning and i cant figure out what he is.maybe some sort of snail? he came out of my new rock its fuji. it has had lots of hitch hikers in it. thanx for your help

 

[Fluff]

It's actually a chiton. A very nice critter to have.