Shell gimlet, roughly shaped, one of four specimens mounted on a board illustrating the stages in the manufacture of a carpenter's tools

Shell gimlet, with the shell formed, one of four specimens mounted on a board illustrating the stages in the manufacture of a carpenter's tools

Shell gimlet, pointed and sharpened, one of four specimens mounted on a board illustrating the stages in the manufacture of a carpenter's tools

Shell gimlet, polished and finished - missing, one of four specimens mounted on a board illustrating the stages in the manufacture of a carpenter's tools

Bronze ant-nose coin, in conventionalized form of cowrie shell: China, Zhou dynasty, 770 - 255 BC

Bronze ant-nose coin, in conventionalized form of cowrie shell: China, Zhou dynasty, 770 - 255 BC

Shells, mya arenaria, Linn, two valves: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, ostrea sp. var., six valves: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, arca granosa, Linn, four bivalves and on valve: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, pecten lagricatus, Sowerby, two valves each broken: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, lutraria nutallu, Conrad, two valves: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, cyclina chimensis, three valves: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Oyster shells, ostrea demelamellosa (Lischke), two valves one of which has been pierced: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Shells, japes melanaegis, Romer, two bivalves: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Clam shell, arca suberenata (Lischke), one valve: Japan, Musashi province, Mitsusawa shell-mound, prehistoric

Six shells, solens gouldi, Conrad: Japan, Musashi province, Mitsusawa shell-mound, prehistoric