Calyptraea centralisCalyptraea centralis is a species of sea snail of the family Calyptraeidae, a marine gastropod mollusk also known as the slipper snail, slipper limpet, cup-and-saucer snail, or Chinese hat snail.Description and habitatThe species' maximum recorded shell length is. Calyptraea centralis has been recorded at depths from 0m to.