Thanks Mary Jo,
The only book I have at my desk here at work is:
Andrews - Texas Shells...  so she has it wrong.
Leslie
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Collectable Florida Seashells      R Tucker Abbott
says this shell is: Arcinella arcinella ( Linneaus 1767)
Which is correct?  How does this work?  In 1866, Conrad changed the name of
this shell?
Merry Christmas!
Mary Jo, Illinois, USA
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The other is Arcinella cornuta Conrad, 1866
The Spiny Jewel Box
Leslie