> It's definitely a Monday morning!  The Mystery Page is at:
>  http://www.manandmollusc.net/Mystery_shell_pages/markT-mystery.html
>

The shape of the suture lines will give you an identification.  I'm
not up on the details, but Placenticeras (Cretaceous) might be worth
looking up.  They're relatively big and flat.


--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"

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