Hello Art,
Many years ago at a shell show in Jacksonville, Florida, Tucker Abbott and I
were talking about Papustyla pulcherrima. I have two specimens that are
almost totally yellow. Tucker told me that they could have been treated with
acid or the coloration was natural, due to dry or drought weather. Don't know
how one would tell if their shell was treated with acid or yellow by natural
conditions.
Best Regards,
Bob
Panama City, FL