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Sun, 1 Aug 2004 00:41:11 +1200 |
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>Not following this one! The embedded prismatic cells in the shell are
>created by the mantle of the animal. Yes, I realize they are structurally
>different than the soft parts pigments, but if the animal cannot secrete
>melanin say, than this should be lacking in both shell and soft parts.
>Different process but same origin, what am I missing?
>
>Tom Eichhorst (writing this before my first cup of coffee - dedicated...)
>But---from whence would come the pigments used in creating this
>"normally patterned" shell??
>
>Kay
These are "waste" products produced by normal metabolism, not
genetically-controlled tissue pigmentation (gee, am I spouting crap
here?)
I can't say for sure that they would occur in an albino snail, but it
seems lilkely (to me, at least). Anyone actually know?
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
<[log in to unmask]>
Seashell, Macintosh, VW/Toyota van nut
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