Alcithoe is a genus of large sea snails, marine gastropod molluscs in the subfamily Cymbiinae of the family Volutidae, the volutes.

[1] Alcithoe are large, benthic neogastropod marine snails.

[2] Species are predators, and all taxa undergo direct development.

[4] Alcithoe species are found in seas surrounding New Zealand.

[6][5] Species within the genus Alcithoe include:[2][6][1]