Vasum

Vasum, common name the vase snails or vase shells, is a genus of mostly rather large predatory sea snails, marine gastropod mollusks in the family Vasidae.

==Shell description== Shells of species in this genus are usually somewhat large, and are usually very thick and heavy. They are often vase-shaped, in the sense that the shell of most of the species is more or less widely conical. The shells have a thick periostracum, a low spires, and 2, 3 or 4 plaits on the columella.