A set of three Ivory harpoon heads tipped with with iron blades. Each of the harpoon heads has a single set of paired barbs, and the iron blades also are barbed. The blades are secured in slots in the harpoon heeads with copper rivets.
FROM CARD: "1 OR 2 ILLUS. IN PROCEEDINGS, USNM, VOL. 60; P1. 25, NO. 11; P. 48."