Tom,
 
You wrote:
 
>All three of these writers have gone a
>little beyond taxonomy (the normal limit of a shell book) and I have
>enjoyed reading each of them.  Is there more?
 
>Tom Eichhorst in New Mexico, USA
 
A good work on natural history of mollusks is "Living Marine Molluscs", by
C.M. Yonge and T.E. Thompson, published in 1976 by Collins, London. There
should be a few copies available in the second hand book market. (Dick
Petit has a copy in his December 1998 catalog for $12.)
 
Regards,
 
Jose
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Jose H. Leal, Ph.D.
Director, The Bailey-Matthews Shell Museum
Editor-in-chief, THE NAUTILUS
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