I will now consider the variations of the different parts of these harpoons in detail, beginning with the head. Our series is so large, containing in all forty-eight heads, besides some spare blades, that it probably gives a fair representation of the common variations. The longest of this series is 6 inches long and the shortest 3½, but by far the greater number are from 4½ to 5 inches long. Their proportions are usually about as in the types figured, but the long head just figured (No. 56772 [534]) is also unusually slender. Sheet brass is the commonest material for the blade (thirty blades are of this material), though iron or steel is sometimes used, and rarely, at present, slate. There is one slate-bladed head in the series (No. 56620 [199]) figured above, and four blades for such heads. The blade is commonly of the shape of the type figured, triangular with curved edges, varying from a rather long triangle like the slate blade just mentioned to a rather short one with very strongly curved edges like Fig. 215_a_ (No. 89750 [1038]), which is peculiar as the only walrus harpoon head with a body of reindeer antler. It also has an iron blade and a rivet of iron, not seldom with rounded basal angles so as to be almost heart-shaped, like Fig. 215_b_ (No. 56621 [283]). A less common shape of blade is lanceolate, with the base cut off square as in Fig. 216_a_ (No. 89764 [940]). Only eight blades out of the series are of this shape. A still more peculiar shape of blade, of which we saw only one specimen, is shown in Fig. 216_b_ (No. 89790 [943]). This is made of brass. It was perhaps meant for an imitation of the barbed blades used at the Mackenzie, of which I have already spoken. [Illustration: FIG. 215.--Typical walrus-harpoon heads. 1/2] [Illustration: FIG. 216.--Typical walrus-harpoon heads. 1/2] The blade, when of metal, is generally fastened in with a single rivet. One only out of the whole number has two rivets, and three are simply wedged into the blade slit. The slate blades appear never to have been riveted; Nordenskiöld, however, figures a walrus harpoon from Port Clarence[N335] with a jade blade riveted in. The rivet is generally made of whalebone, but other materials are sometimes used. For instance, in the series collected two have rivets of iron, two of wood, and five of rawhide. The body is generally made of white walrus ivory, (five of those collected are of hard bone, and one already mentioned and figured, No. 89750 [1038], Fig. 215_a_, is of reindeer antler), and the hexagonal shape, often with rounded edges, and the line grooves continued to the tip, as in Fig. 217_a_, No. 89757 [947], appears to be the commonest. Three out of the forty-eight have four-sided bodies. It is unusual for the body barb to be bifurcated, as is common farther south. Only three out of the forty-eight show this peculiarity, of which No. 56613 [53], Fig. 217_b_, is an example. [Footnote N335: Vega, vol. 2, p. 229, Fig. 3.]