Apparently the toe end of a slippered foot. The slipper is decorated with a lotus bud and flower pattern. Three-quarters life size. In Reisner publication, this is thought to be the prow of a faience model boat.
From Nubia, Kerma, K III, Hall A. December, 1913: excavated by the Harvard University-Museum of Fine Arts Expedition; assigned to the MFA by the government of the Sudan.
Harvard University—Boston Museum of Fine Arts Expedition