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in diameter and the base is conical. The barbs on two fragments of 
harpoon points with barbs on both edges (Plate VII, figures 1, 2) are also 
of the fourth type. 
The fifth type of barb comprises those in which notches, from a third 
to a half as deep as the width of the harpoon head, are cut far into the 
shaft. This type is seen on eight specimens and fifteen others probably 
had it. Three are entire specimens, with a hole through the tang; five 
are mere fragments of harpoon heads; eight are fragments which prob- 
ably had a hole through the tang; and seven are fragments which have 
a hole through the tang and probably had barbs of this type. This type 
of barb occurs on most of the large harpoon points, entire specimens of 
which have a hole through the tang (Plate VI, figures 10, 11), and appears 
on the tip of a harpoon point (Plate VI, figure 14) which also probably 
had a hole through the tang. It may be considered as an enlargement 
and modification of the third type, which has a notch on each side and one 
across the edge, but in that type the notch is a small feature on the shaft. 
The outer or long edge of the barb is usually rounded, from the tip to the 
base of the next barb above, or to the tip of the harpoon head, if it be 
the tip barb. This rounding obscures the signs of a notch under the 
barbs. The grooves extending beyond the axil of the barbs show only 
slightly if at all. The barbs on the harpoon head shown on Plate VI, 
figure 4, if they had been deeper in proportion to the width of the specimen, 
might be considered to belong to this type rather than to type three, or 
to be an intermediate form, as the outer edge of each barb is cut in from 
the tip of the barb back to the base of the next barb. 
One specimen (Plate VI, figure 10) has two barbs and shows the 
marrow canal of the thick, large bone from which it was cut. The obverse 
is ridged, which gives the harpoon head a somewhat triangular cross- 
section. The tips of the barbs and the edge of the widest part of the tang 
seem to represent the original outline of the bone. The hole through 
the wedge-shaped tang is close to the barbed edge and is gouged out, taper- 
ing inwards from both openings. Another specimen (Plate VI, figure 11) 
is made of a rather flat bone and has two widely separated barbs. The 
tang is not wedge-shaped, but the whole object is thin. The perforation 
through the tang is in the widest part close to the barbed edge. On the 
obverse side the hole is worn down towards the back of the harpoon head, 
as if from the wear of a cord fastened on the other side by a knot. 
Another harpoon point (Plate VI, figure 12) is made of the wall of 
a bone and has six barbs. The tips of three of the barbs are broken, but 
the others each retain a part of the original outline of the bone blank 
from which the point is derived, as is the case on some of the specimens 
having barbs of type three, and on all of those having barbs of types one 
and two. The tang narrows nearly to a point and is slightly wedge- 
shaped. The hole through its widest part, nearer the barbed edge than 
the back, was gouged out and tapers inwards from both openings. 
A point found in heap A had at least two barbs, apparently of the 
fifth type, but they are lacking. It is made of a piece of the wall of a 
long bone, and is, consequently, convex on one side and shows the marrow 
canal on the other. The tang narrows to an end cut straight across and 
is slightly wedge-shaped. The hole through the widest part and near 
the barbed edge is gouged and tapers inwards from both openings. 
