Cylichna bulloidea Dell, 1956
Height 4.3mm, Width 2.5mm
Marine, Native - Endemic
Kermadec Islands, north-eastern North Island, north-eastern South Island and Chatham Rise, from 302-1568m

Cylichna thetidis Hedley, 1903
Height 11mm, Width 4mm
Marine, Native - Non-endemic, Shell narrow, elongate-cylindrical, white under a pale yellow periostracum. Columella thickened, with a single strong fold
Eastern Australia and New Zealand. Middlesex Bank, North Island and Antipodes Islands, from 0-246m

Cylichna zealandica T.W. Kirk, 1880
Height 13mm, Width 5.5mm
Marine, Native - Endemic
Kermadec Islands, Middlesex and King Banks, Three Kings Islands, north-eastern and south-western North Island, and northern South Island, from 0-805m

Toledonia succineaformis Powell, 1955
Height 2mm, Width 1.5mm
Marine, Native - Endemic
South-eastern South Island and Auckland Islands, from 174-660m