Most of the Pliocene cowries of the southeastern U.S. are Siphocypraea
carolinensis (Conrad, 1841), including most if not all of the odd "species"
or "genera" from south Florida.  It ranges from Virgina (a single known
locality) to Florida and poor specimens are not uncommon at some localities
in the Carolinas.  Cypraeorbis, a small cowrie, is relatively common in the
Eocene limestones of the Carolinas, but I have not found enough information
on the differences (if any) among described species in order to identify
them.
 
David Campbell
 
"Old Seashells"
 
Department of Geology
CB 3315 Mitchell Hall
University of North Carolina at Chapel Hill
Chapel Hill NC 27599-3315
USA
 
919-962-0685
FAX 919-966-4519
 
"He had discovered an unknown bivalve, forming a new genus"-E. A. Poe, The
Gold Bug