Phalium

Phalium, common name the bonnet shells, is a genus of large sea snails, marine gastropod mollusks in the family Cassidae, the helmet shells, bonnet shells and their allies. == Species== According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Phalium : ...
Found on http://en.wikipedia.org/wiki/Phalium
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