Fig. 154, No. 89777 [1004_b_], which belongs in the “kit” of Ilû´bw’ga, the Nunatañmiun, previously mentioned, is interesting from having been lengthened 3¼ inches by riveting on a piece of reindeer antler at one end. The two pieces are neatly joined in a “lap splice” about 2 inches long and fastened with three iron rivets. The owner appears to have concluded that his drill bow was too short when he was at home, in the interior, where he could obtain no walrus ivory. The incised pattern on the back is colored with red ocher. The mouthpiece (kĭ´ñmia) consists of a block of hard stone (rarely iron), in which is hollowed out a round cup-like socket, large enough to receive the tip of the drill shaft, imbedded in a block of wood of a suitable size to hold between the teeth. This block often has curved flanges on each side, which rest against the cheeks. Such mouthpieces are common all along the coast from the Anderson River to Norton Sound, as is shown by the Museum collection. No. 89500 [800], figured in Point Barrow Report, Ethnology, Pl. II, Fig. 3, is a type of the flanged mouthpiece. The block is of pine, carved into a thick, broad arch, with a large block on the inside. Into the top of the arch is inlaid a piece of gray porphyry with black spots, which is slightly convex on the surface, so as to project a little above the surface of the wood. In the middle of the stone is a cup-shaped cavity one-half inch in diameter and of nearly the same depth. This is a rather large mouthpiece, being 6 inches across from one end of the arch to the other. [Illustration: FIG. 153.--Drill bows. 3/8] [Illustration: FIG. 154.--Spliced drill bow. 1/4] There are two other specimens of the same pattern, both rather smaller. No. 89503 [891], Fig. 150, from Nuwŭk, has the stone of black and white syenite. This specimen is very old and dirty, and worn through to the stone on one side, where the teeth have come against it. No. 89787 [1004_c_], Fig. 155, is almost exactly the same shape as the type, but has for a socket a piece of iron 1.1 inches square, hollowed out as usual. The outside of the wood has been painted with red ocher, but this is mostly worn off. This mouthpiece belonged to Ilû´bw’ga. [Illustration: FIG. 155.--Drill mouthpiece, with iron socket. 1/2] Fig. 156, No. 89505 [892], from Utkiavwĭñ, represents the pattern which is perhaps rather commoner than the preceding. The wood, which holds the socket of black and white syenite, is simply an elliptical block of spruce. The remaining three specimens are of the same pattern and of the same material as the last, except No. 89507 [908], from Nuwŭk, in which the wood is oak. As it appears very old, this wood may have come from the _Plover_.