MR ART WEIL wrote:
>
>      We strike again.
>       This is certain to sound obvious. But I have not seen it
> discussed. It seems that smooth, streamlined shells (Olives, Cowries,
> etc.) are more apt to spend a good part of their lives submerged
> under a layer of mud or sand than are shells with stickers on them (M.
>  pecten, Lambis, etc.) Smoothies can submerge easier. Stickers allow
> for more protection out in the open.
>     So the question is: are there exceptions to this phenomenon?
>        Art
 
_Turbo petholatus_ comes immediately to mind.
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