Fellow Conch-Lers,
 
Nicholas Zantopp, a young (yes, 11 years old) shell collector from Fort
Lauderdale, FL, is visiting the collection area of the Shell Museum. He and
his mom came to participate in the (once again) excellent Sanibel Shell
Show. I am trying to find, following his request, if any of you out there
know of any published information on the phenomenon of double opercula.  He
has found a medium-size apple murex (Phyllonotus pomum) that had two
opercula (the animal and shell otherwise look normal); far I couldn't find
any paper(s) or other information that could help Nicholas in his quest for
the double-opercular truth. Best to all,
 
__________________________________________________________________________
Jose H. Leal, Ph.D.
Director-The Bailey-Matthews Shell Museum
Editor-THE NAUTILUS
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3075 Sanibel-Captiva Road
Sanibel, FL 33957 USA
(941) 395-2233; fax (941) 395-6706