Superfamily Vermetoidea (worm shells)

Serpulorbis is a genus of sea snails known as worm shells or worm snails.

Serpulorbis zelandicus is a species of sea snail, a worm snail or worm shell, a marine gastropod mollusc in the family Vermetidae, the worm snails.

Dendropoma maximum is a species of sea snail, a marine gastropod mollusk in the family Vermetidae, the worm snails or worm shells.

Siphonium is a genus of sea snails, marine gastropod mollusks in the familyVermetidae, the worm snails or worm shells.

Vermetidae, common name the worm snails or worm shells, is a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha.

The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails".

Tenagodus anguinus is a species of unusual sea snail, a marine gastropod mollusk in the family Siliquariidae, the slit worm shells.

So they used poles to poke the ground for worm shells, making sure it was safe.

Petaloconchus is a genus of sea snails, marine gastropod mollusks in the family Vermetidae, the worm snails or worm shells.