On 27-Dec-23 12:48 p.m., John Jacobs wrote:
> All the shells in the first photo are dextral.  The second photo has the aperture views of shells h, I, j, and l looking sinistral but not the dorsal views.  Based on this, I would say the images for those 4 aperture views are reversed.

* it would be the kind of story archeologists love to tell to attribute 
the selection of sinistral shells to the dawn of malacological acuity 
among these Mesolithic folks.

fred.
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> -----Original Message-----
> From: Conchologists List <[log in to unmask]> On Behalf Of Erick Staal
> Sent: Wednesday, December 27, 2023 10:44 AM
> To: [log in to unmask]
> Subject: Re: [CONCH-L] Columbella rustica in Mesolithic burial site
> 
> Thanks for your feedback. I tried to have a look at the shells at the top-right of the first photo, but these all seem right-handed to me.
> Perhaps I'm looking at the wrong shell(s)?
> 
> By the way. The second photo definitely has mirror-images: please have a look at the Columbella specimens f, g, h, i and j. Assuming that these all depict the same shell once from the back and once from the front per shell, the shells on the back are depicted right-handed (I rotated the shells in my head. :-) ), but the photo's with the apertures towards the viewer are depicted left-handed. This cannot both be true (if e.g. the
> shell(s) depicted under f represent the same shell).
> 
> As I dared to state before: I've seen many specimens of Columbella rustica and I wish there would have been a sinistral one in my sights, but alas.
>
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