Nancy,
  Ed Petuch has written extensively on the Florida fossil fauna.  In his
last book he listed 25 Siphocypraea, also with a number of other Cypraea.
Don't have the title of the book handy but can get it for you if you are
interested.

Charlie
******************************************************************************
Charlie Sturm, Jr
Research Associate - Section of Invertebrate Zoology
                     Carnegie Museum of Natural History, Pittsburgh, PA
Assistant Professor - Family Medicine

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