The Collaborative International Dictionary of English v.0.48:

Papboat \Pap"boat`\, n.
   1. A kind of sauce boat or dish.
      [1913 Webster]

   2. (Zool.) A large spiral East Indian marine shell
      (Turbinella rapha); -- so called because used by native
      priests to hold the oil for anointing.
      [1913 Webster]