As for Arbacia lixula it surely hosts the Eulimid Vitreolina philippi in
the Mediterranean, even if at a lower level than the other sea urchin
Paracenthrotus lividus. I persoanlly collected that Eulimid from both the
two urchins in late Spring, say May or June.
Enzo Campani

At 02.04 05/11/01 -0600, you wrote:
>Paolo is correct, judging by my experience in the Pacific.  You
>may find some areas in which the holothurian Stichopus chloronotus
>is abundant, but no parasitic eulimids.  In other areas nearly every
>sea cucumber will have several attached to the skin.  Same with
>the ones that parasitize starfish and urchins, you may have to cover
>a lot of ground to find them, but once you do find them, they will
>probably be easy enough to collect.
>
>Cheers,
>
>
>Don
>
>----- Original Message -----
>From: "Paolo G. Albano" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Saturday, November 03, 2001 12:26 PM
>Subject: Re: Eulimidae
>
>
> > I do not know if Arbacia lixula hosts any Eulimidae, but try the same host
> > species in different localities.
> > It concerns a different species and host, but in the Mediterranean
> > Coralliophila meyendorffii parasitize sea anemones.  But sometimes you
> > encounter hundreds of anemones and no Coralliophila, while other times you
> > hit the right spot.
> > And this is a general rule with a lot of parasitizing mollusks: Melanella
> > (Eulimidae) and holoturians, Coralliophila meyendorffii with
>madreporarians
> > (yes, it paratizes them too), ecc. ecc.
> > E-mail: [log in to unmask]
> >