Emilio notes on his site at
http://www.geocities.com/Eureka/Gold/9440/polymita/polylit.html
that export of Polymita for non-scientific reasons was forbidden in the 1940's, although laws have changed a lot in Cuba since then.
Dr. David Campbell
Old Seashells
University of Alabama
Biodiversity & Systematics
Dept. Biological Sciences
Box 870345
Tuscaloosa, AL 35487-0345 USA
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That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa