Cylichna bulloidea Dell, 1956 Height 4.3mm, Width 2.5mm Marine, Native - Endemic Lower North Island and Chatham Rise to Chatham Islands, 280-600 metres CM |
Cylichna thetidis Hedley, 1903 Height 11mm, Width 4mm Marine, Shell narrow, elongate-cylindrical, white under a pale yellow periostracum. Columella thickened, with a single strong fold Northland to Bay of Plenty and occasional occurences as far south as Wellington. Also New South Wales, Australia KA |
Cylichna zealandica T.W. Kirk, 1880 Height 13mm, Width 5.5mm Marine, Native - Endemic, Closely resembling thetidis, but has a sudden narrowing of the shell at the apex, and the columellar fold is very slight to obsolete North Island down to Cook Strait. In shell sand and dredged to at least 60 metres AC |
Toledonia succineaformis Powell, 1955 Height 2mm, Width 1.5mm Marine, Native - Endemic Southern Islands. Off Auckland Islands, 175 metres FAn |