Plz cypraea Id* (Melanism "nigerisation")

[diocrisseashells1000]

Hi Bart,
Here is the reference on where i base my identification,

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If you have a more better source on where to find the "form Niger", that would be great, and great help to helmetapointe. and if you could post a link or any photo of it for comparison that would be nice,.
Thanks,
Diocris