Crucibulum spinosum, common name the spiny cup-and-saucer snail, is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae, the slipper snails and cup-and-saucer snails.

The shell has a width of 44.6 mm.

This species is native to the west coast of the Americas, from California to Chile.

It has been introduced and established in Hawaii.

This Calyptraeidae-related article is a stub.