Hi, can any members help me identify this fossil gastropod I bought a few years' back from a junk shop? I don't know its age or its location. It could be Jurassic from Dorset, southern England, but that's only a guess. So, too, is my own identification, that it's an inner cast of a homotoma. No idea as to the species, though, and it could well be something else. Any sea slug lovers out there?