#mollusc_shell__molluscshell__shell  the hard largely calcareous covering of a mollusc
  supertype:  natural_covering__naturalcovering__covering__cover  a natural object that covers or envelops; "the fox was flushed from its cover"
  subtype:  scallop_shell__scallopshell  a shell of a scallop
  subtype:  oyster_shell  a shell of an oyster
  subtype:  phragmocone__phragmacone  the thin conical chambered internal shell (either straight or curved) of a belemnite
  subtype:  seashell  the shell of a marine organism
  subtype:  clamshell  the shell of a clam

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