2. (noun) dark rock shell, snail whelk, Haustrum haustorium - a large species of predatory sea snail. The shell has a low point, weak spiral groves and large aperature. Dark brown to purple in colour, white inside. Common among rocks between tides.

3. (noun) freshwater mussel, Hyridella menziesi - a bivalve mollusc which lives in fine mud or sand in freshwater lakes, ponds, streams and rivers. Has a dark, olive-brown coated shell and the inside is grayish-white.