This is an as-yet-unnamed Powelliphanta species, provisionally known as Powelliphanta "Egmont". It is one of the amber snails, an undescribed species of large, carnivorous land snail, a terrestrial pulmonate gastropod mollusc in the family Rhytididae.
Conservation status Powelliphanta "Egmont" is classified as Range Restricted by the New Zealand Threat Classification System.
References
Powell A W B, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 New Zealand Department of Conservation Threatened Species Classification Department of Conservation Recovery Plans