The other is Arcinella cornuta Conrad, 1866
The Spiny Jewel Box

Leslie

Dear Listers,

http://www.idscaro.net/ext/f_myst/whois.htm
my mysteries pages, has two new entries which are waiting for your help.
One, something like a Chama, comes from southern USA, but can't tell you if
it's from the Western or Eastern side.
The second, maybe a Glycymeris, comes from European Atlantic shores.

Thank you for your help in ID, and merry Xmas to all!

O.Caro