Hello, Listers!

I have in front of me a Cymatium lotorium, and a supposedly Cymatium perriyi.  I notice that the latter is shiny, as are some of the pictures I find on the Shell Catalog website.  But, if a lotorium were treated with acid it might very well become similar to the "perryi," including the shine that results when some Filipinos process a shell with acid, a process which is very common.

Are there any characteristics to distinguish between real shells of the two species?  I have the data on the lotorium, but not on the perryi.

Thanks,
Linda

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