Arthur William Baden Powell was a New Zealand malacologist, naturalist and palaeontologist, a major influence in the study and classification of New Zealand molluscs through much of the 20th century. He was known to his friends and family by his third name, "Baden".
Austrolittorina antipodum, known as the banded periwinkle, is a species of small sea snail, a marine gastropod in the winkles and periwinkles family, Littorinidae. It occurs in New Zealand.
Zeatrophon mortenseni is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails or murex snails.
Xymene teres is a species of predatory sea snail, a marine gastropod mollusc in the family Muricidae, the rock snails or murex snails.
Sigapatella terraenovae is a species of sea snail, a marine gastropod mollusc in the family Calyptraeidae.
Harold John Finlay was a New Zealand palaeontologist and conchologist.
Herpetopoma mariae is a species of marine gastropod mollusc in the family Chilodontaidae.
Homalopoma nana is a species of a minute sea snail, a marine gastropod mollusc in the family Colloniidae.
Maoricolpus finlayi is a species of sea snail, a marine gastropod mollusc in the family Turritellidae. It is known to occur only in Spirits Bay, North Island, New Zealand.
Papuliscala superlata is a species of small sea snail, a marine gastropod mollusc or micromollusc in the family Epitoniidae.
Alvania gallinacea is a species of small sea snail with an operculum, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania gradatoides is a species of small sea snail with an operculum, a marine gastropod mollusk in the family Rissoidae.
Admetula superstes is a species of sea snail, a marine gastropod mollusk in the family Cancellariidae, the nutmeg snails.
Argalista is a genus of sea snails, marine gastropod mollusks in the family Colloniidae.
Marshallena neozelanica is a species of sea snail, a marine gastropod mollusk in the family Marshallenidae.
Crassitoniella carinata is a species of marine gastropod mollusc in the family Eatoniellidae. It was first described by Winston Ponder in 1965, and it is the type species for the genus Crassitoniella. It is endemic to the waters of New Zealand.
Eatoniella perforata is a species of marine gastropod mollusc in the family Eatoniellidae. First described by Winston Ponder in 1965, it is endemic to the waters of New Zealand. Compared to most other Eatoniella species of New Zealand, E. perforata is found in relatively deep water.
Powellisetia comes is an extinct species of marine gastropod mollusc in the family Rissoidae. First described by Harold John Finlay in 1926, it is known to have lived in New Zealand during the early Miocene.
Powellisetia unicarinata is a species of marine gastropod mollusc in the family Rissoidae. First described by Powell in 1930 as Notosetia unicarinata, it is endemic to the waters of New Zealand.
Powellisetia paroeca is an extinct species of marine gastropod mollusc in the family Rissoidae. First described by Harold John Finlay in 1924, it is known to have lived in New Zealand during the early Miocene.
