Aclis pseudopareora A. W. B. Powell, 1940 (original description)
Aoteatilia larochei A. W. B. Powell, 1940 (original description)
Austronoba obliquata A. W. B. Powell, 1940 accepted as Subonoba obliquata (A. W. B. Powell, 1940) (original description)
Austrosassia parkinsoniana [sic] accepted as Austrosassia parkinsonia (G. Perry, 1811) (basis of record)
Balcis maoria A. W. B. Powell, 1940 accepted as Melanella maoria (A. W. B. Powell, 1940) (original description)
Balcis pervegrandis A. W. B. Powell, 1940 accepted as Hypermastus bulbulus (Murdoch & Suter, 1906) (original description)
Brookula contigua A. W. B. Powell, 1940 (original description)
Brookula lincta A. W. B. Powell, 1940 accepted as Brookula prognata H. J. Finlay, 1926 (original description)
Buccinulum (Euthrena) mariae A. W. B. Powell, 1940 accepted as Buccinulum mariae A. W. B. Powell, 1940 (original description)
Buccinulum (Evarnula) multilineum aupouria A. W. B. Powell, 1940 accepted as Buccinulum linea (Martyn, 1784) (original description)
Chileutomia neozelanica A. W. B. Powell, 1940 (original description)
Cirsonella variecostata A. W. B. Powell, 1940 (original description)
Cominella (Cominula) youngi A. W. B. Powell, 1940 accepted as Cominella necopinata (H. J. Finlay, 1930) (original description)
Conjectura carinata A. W. B. Powell, 1940 accepted as Acremodontina carinata (A. W. B. Powell, 1940) (original description)
Dardanula roseola (Iredale, 1915) accepted as Eatoniella roseola (Iredale, 1915) (basis of record)
Eulima mangonuica A. W. B. Powell, 1940 accepted as Fusceulima mangonuica (A. W. B. Powell, 1940) (original description)
Gazameda maoria A. W. B. Powell, 1940 accepted as Stiracolpus maorius (A. W. B. Powell, 1940) (original description)
Ividella maoria A. W. B. Powell, 1940 (original description)
Linemera pinguoides A. W. B. Powell, 1940 accepted as Alvania pinguoides (A. W. B. Powell, 1940) (original description)
Liratilia gracilis A. W. B. Powell, 1940 accepted as Liratilia conquisita gracilis A. W. B. Powell, 1940 (original description)
Lironoba anomala A. W. B. Powell, 1940 (original description)
Lissotesta bicarinata A. W. B. Powell, 1940 (original description)
Lissotesta consobrina A. W. B. Powell, 1940 accepted as Lissotestella consobrina (A. W. B. Powell, 1940) (original description)
Lissotesta decipiens A. W. B. Powell, 1940 (original description)
Lissotesta oblata A. W. B. Powell, 1940 (original description)
Lodderia iota A. W. B. Powell, 1940 (original description)
Lodderia waitemata A. W. B. Powell, 1940 (original description)
Macrozafra enwrighti A. W. B. Powell, 1940 (original description)
Macrozafra mariae A. W. B. Powell, 1940 (original description)
Maoricolpus finlayi A. W. B. Powell, 1940 (original description)
Maoricrypta youngi A. W. B. Powell, 1940 (original description)
Mendax duplicarinata A. W. B. Powell, 1940 accepted as Metaxia duplicarinata (A. W. B. Powell, 1940) (original description)
Micantapex angustatus A. W. B. Powell, 1940 accepted as Kuroshioturris angustata (A. W. B. Powell, 1940) (original description)
Micantapex finlayi A. W. B. Powell, 1940 accepted as Bathytoma murdochi H. J. Finlay, 1930 (original description)
Munditia anomala A. W. B. Powell, 1940 (original description)
Munditia delicatula A. W. B. Powell, 1940 (original description)
Mysella larochei A. W. B. Powell, 1940 (original description)
Naricava (Tropidorbis) neozelanica A. W. B. Powell, 1940 accepted as Naricava neozelanica A. W. B. Powell, 1940 (original description)
Neolepton sanguineum (F. W. Hutton, 1883) accepted as Neolepton antipodum (Filhol, 1880) (basis of record)
Neothais scalaris (Menke, 1829) accepted as Dicathais orbita (Gmelin, 1791) (basis of record)
Nepotilla nitidula A. W. B. Powell, 1940 (original description)
Nepotilla vera A. W. B. Powell, 1940 (original description)
Nobolira affinis A. W. B. Powell, 1940 accepted as Attenuata affinis (A. W. B. Powell, 1940) (original description)
Nobolira contigua A. W. B. Powell, 1940 accepted as Attenuata contigua (A. W. B. Powell, 1940) (original description)
Nobolira regis A. W. B. Powell, 1940 accepted as Attenuata regis (A. W. B. Powell, 1940) (original description)
Notosetia crassilabrum A. W. B. Powell, 1940 accepted as Powellisetia crassilabrum (A. W. B. Powell, 1940) (original description)
Notosetia infecta (Suter, 1908) accepted as Pusillina (Haurakia) infecta (Suter, 1908) accepted as Haurakia infecta (Suter, 1908) (basis of record)
Notosetia multilirata A. W. B. Powell, 1940 accepted as Powellisetia subtenuis (A. W. B. Powell, 1937) (original description)
Notosetia subcarinata A. W. B. Powell, 1940 accepted as Powellisetia subcarinata (A. W. B. Powell, 1940) (original description)
Opimilda maoria A. W. B. Powell, 1940 accepted as Mathilda maoria (A. W. B. Powell, 1940) (original description)
Orbitestella vera A. W. B. Powell, 1940 accepted as Orbitestella parva (H. J. Finlay, 1924) (original description)
Pervicacia mariae A. W. B. Powell, 1940 accepted as Euterebra tristis (Deshayes, 1859) accepted as Duplicaria tristis (Deshayes, 1859) (original description)
Promerelina lacunosa A. W. B. Powell, 1940 accepted as Merelina lacunosa (A. W. B. Powell, 1940) (original description)
Scalaronoba secunda A. W. B. Powell, 1940 (original description)
Siliquaria maoria A. W. B. Powell, 1940 accepted as Tenagodus maoria (A. W. B. Powell, 1940) (original description)
Splendrillia larochei A. W. B. Powell, 1940 (original description)
Striatestea eulima A. W. B. Powell, 1940 (original description)
Subonoba aupouria A. W. B. Powell, 1940 (original description)
Taron mouatae A. W. B. Powell, 1940 (original description)
Venustilifer secundus A. W. B. Powell, 1940 accepted as Pelseneeria secunda (A. W. B. Powell, 1940) (original description)
Vermicularia maoriana A. W. B. Powell, 1937 (additional source)
Zeadmete aupouria A. W. B. Powell, 1940 (original description)
Zeadmete finlayi A. W. B. Powell, 1940 (original description)
Zelaxitas alta A. W. B. Powell, 1940 accepted as Laevilitorina (Rissolittorina) alta (A. W. B. Powell, 1940) represented as Laevilitorina alta (A. W. B. Powell, 1940) (original description)
Zemitrella attenuata A. W. B. Powell, 1940 (original description)
Zemitrella fallax A. W. B. Powell, 1940 (original description)
Zemitrella laevirostris A. W. B. Powell, 1940 (original description)
Zemitrella regis A. W. B. Powell, 1940 (original description)
Zeradina (Radinista) scalarina A. W. B. Powell, 1940 accepted as Radinista scalarina (A. W. B. Powell, 1940) (original description)
Zerotula ammonitoides A. W. B. Powell, 1940 accepted as Omalogyra ammonitoides (A. W. B. Powell, 1940) (original description)
Zerotula nummaria A. W. B. Powell, 1940 (original description)
Zerotula ramosa A. W. B. Powell, 1940 accepted as Palazzia ramosa (A. W. B. Powell, 1940) (original description)

 Taxonomic remark

 for Rissoina fuscozona Suter, 1908

Referred to Potamopyrgus Stimpson, 1865 (Tateidae)by Powell, 1940 [details]