Thanks Tom, I'll forward this informtation to Nicholas at the Shell Show
today!
>This might be associated. I don't have the paper before me (it's at the
>office) but it comes up with the keyword "operculum" in my database:
>
>Honigmann, H. L. 1912. Uber Doppeldeckelbildungen bei Nassa mutabilis
>(Linne). Zoologischer Anzeiger 39(23-24):689-692; 3 figs.
>
_______________________________________________
Jose H. Leal, Ph.D.
Director - The Bailey-Matthews Shell Museum
Editor - THE NAUTILUS
3075 Sanibel-Captiva Road - P.O. Box 1580
Sanibel, FL 33957
(941) 395-2233; fax (941) 395-6706
[log in to unmask]