Acteonidae includes acteonoideans with large, well calcified
shells that have obvious spires. Parapodia are absent and the aperture
can usually be closed with a chitinous operculum. Most species are
nocturnally active burrowers that feed on polychaete worms. There are probably four species in Hawaii belonging to two genera (Acteon and Pupa).
Pilsbry, 1921 refers to shells of Pupa nitidula
(Lamarck, 1816) collected from Hawaii by Newcomb but suggests that the
collection location is questionable. We've seen no evidence of the