Meanings

kanji "shell" radical at left

small shell

kanji "big shell" radical

pattra (palmyra leaves used in Ancient India for writing upon)

pattra (palmyra leaves used in Ancient India for writing upon)

bivalves

Korean mussel (Mytilus coruscus)

Soletellina diphos (species of clam)

tiger cowrie (Cypraea tigris)

lingulate brachiopod (esp. species Lingula anatina)

Cinnalepeta pulchella (species of spiral-shelled gastropod)

fritillary (Fritillaria verticillata var. thunbergii)

Japanese big-ear radix (pond snail, Radix auricularia japonica)

Japanese scallop (Patinopecten yessoensis)

Beyrich's slit shell (species of sea snail, Pleurotomaria beyrichii)

giant clam (any clam of subfamily Tridacninae)

Mya arenaria oonogai (subspecies of soft-shell clam)

full-blooded tellin (Pharaonella sieboldii)

Placamen tiara (species of venerid)

shell money