On pg. 396 of the second edition American Seashells there is a drawing of a crawfish with a Pseudopythina rugifera attached  to it's underside. Hope this helps.

TONI
---- [log in to unmask] wrote:
> David,
>
> > I have a distinct memory of an illustration of a lobster with bivalves
> > attached to the ventrum. I'm at work, so I don't have it handy. I think it
> > was in the 1st edition of American Seashells (and in the 2nd?).
> >
> > Does anyone know what I'm talking about?
> >
> > David Kirsh
>
> This is from the Chapter 27 by Coan and Valentich-Scott in The Mollusks: A
> Guide to Their Study, Collection, and Preservation (2006):
>
> 27.4.6 Commensal species. Other specialized habitats for marine bivalves
> that are often overlooked include those living commensally (e.g.,
> Neaeromya, Mysella, Rochefortia) on hermit and sand crabs, segmented and
> peanut worms, or attached to other invertebrates or in their burrows.
> Often small bivalves are found on the abdomen and telson of burrowing
> crustaceans. Some polychaetes, such as the chimney worm Diopatra cuprea
> (Bosc, 1802), collect small mollusks, including small bivalves, to
> construct their tubes.
>
> Yes, I too remember an illustration in the 1st. ed of American Sheashells
> showing a bivalve attached to the telson of a crustacean.
> Regards,
> Charie
> .................................................
> Research Associate - Section of Mollusks
> Carnegie Museum of Natural History
> Pittsburgh, PA, USA
>
> Assistant Professor - Family Medicine
>
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