11-02-2007, 04:09 AM
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 | Super Moderator Senior Pearl-Guide.com Pearl Expert | | Join Date: Jun 2004 Location: Santa Monica, CA
Posts: 2,563
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| The pen shell is otherwise called the Pinna rugosa or the Atrina maura. You won't find a lot of reference to either of them. But you should find reference to the Pinna nobilis in Strack.
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