Clapper Item Number: E16285-0 from the National Museum of Natural History
FROM CARD: "DANCE RATTLE OR CLAPPER CARVED FROM WOOD IN THE SHAPE OF A SHORT THICK PADDLE, SPLIT LONGITUDINALLY ACROSS ITS WIDTH. ONE SECTION IS SOLID WITH ITS HANDLE; THE OTHER IS HINGED TO HANDLE WITH A NOTCH BONE SPRING. THE FLAT SIDES OF EACH SECTION ARE HOLLOWED OUT LIKE A SPOON. THE WOOD IS STAINED BLACK. ILLUS. IN BULLETIN 136, USNM, PL. 8-J, P. 121."