>    Thanks much for the worm info. Very interesting. I think I remember Darwin noting that earthworms caused tombstones to sink by so much in a certain amount of time.
>    Now, if they only had shells, I could justify my interest. (Well, they do look a bit like slugs.)<

Some land snails eat earthworms, and certain marine annelid worms make shells that have been confused with worm snails.  On the other hand, aplacophorans and some specialized parasitic snails look rather like worms.  Xenoturbella, recently suggested to be a worm-like protobranch bivalve, has even more recently been identified as a deuterostome that eats protobranchs, hence the presence of protobranch DNA and anatomical parts.

    Dr. David Campbell
    Old Seashells
    University of Alabama
    Biodiversity & Systematics
    Dept. Biological Sciences
    Box 870345
    Tuscaloosa, AL  35487-0345 USA
    [log in to unmask]

That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa