Thanks Mary Jo, The only book I have at my desk here at work is: Andrews - Texas Shells... so she has it wrong. Leslie _________________ 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 _________________ The other is Arcinella cornuta Conrad, 1866 The Spiny Jewel Box Leslie