I collected a 16 mm. shell from Koh Ngai, Thailand (Andaman Sea). I
think it may be Cantharus eximius, but I would appreciate confirmation
of its ID. I posted an image of the shell on my web page:
http://members.cox.net/cbankston/ShellImages.html .
(The other images on the site are older ones whose captions I haven't
yet revised.)
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Cecil N. Bankston
Baton Rouge, LA USA