Glycymeris modesta (Angas, 1879)
Width 26mm, Height 24mm
Small Dog Cockle, Marine, Native - Endemic
King Bank and Three Kings Islands, Cape Reinga, north-eastern and south-western North Island, far northern and southern South Island, Stewart and Chatham Islands and Mernoo Bank, from 0-805m

Tucetona laticostata (Quoy & Gaimard, 1835)
Height 124mm, Width 110mm
Large Dog Cockle, Marine, Native - Endemic
Middlesex and King Banks, Three Kings Islands, off Cape Reinga, North Island, far northern and far southern South Island, Stewart, Snares and Chatham Islands, and Mernoo Bank, from 0-805m