Just to add to the question.
    Is it possible that the interior worms are those that either make their
way through the Cone shell or through the Mollusk in some egg-like form,
and then establish themselves in what we may call the "Mayhew Layer"?
            Q-Man

Ross Mayhew wrote:

> I will try again (i really hate being ignored!!): Do worms often burrow
> into living cones (as opposed to simply living on them and leaving a
> calcareus test)?  The worm-trace with critters that burrow into shells
> leave, is usually black and visible through the shell.  Surely lots of
> Conchlers that live in or have visited tropical climes have the answer
> in their storehouses of Shell Lore?
>
> >From the Great Warm North (37 here last Friday!!!);
> -Ross.