HARPOON-HEADS. 151 



Fig. 242. This figure represents a bone dart-head with bilateral barbs, two 

 on one side and three on the other. It is made of a long bone, showing the 

 internal cavity on one side. The pointed and barbed part is remarkably narrow 

 in proportion to the width of the dart, insomuch that the method of its application 

 is not quite obvious. This specimen, like the original of Fig. 221, was obtained 

 on Goose Island, during Professor Wyman's exploration of shell-heaps in that 

 locality. It is in the Peabody Museum.* 



1 * 



Fio. 243. (13023 a). FlO. 244. (13023). 



Fioa. 243-245. Bone dart-heads. Alaska. 



Fig. 243. A very fine and well-preserved bone point with two sharp barbs 

 on each side and a broad flat lower termination for insertion. This specimen is 

 altogether the neatest North American bone dart-head that has fallen under my 

 notice, being equally well worked on both sides, which show a regular slight 

 convexity. Its length, however, is not more than two inches and seven-eighths. 

 Found by Mr. Dall in the upper mammalian layer on Adakh Island, Alaska. 



Fig. 244. A larger specimen of corresponding form, but less perfect work- 

 manship, and somewhat damaged in various places. The object is a little curved, 

 apparently on account of being cut from a rib. It Was taken by Mr. Dall from 

 the middle mammalian layer on Adakh Island. 



Fig. 245. This dart-head has four sharp barbs on one side and three on the 

 other, the latter having all lost their points. Both extremities of this specimen 

 are likewise defective. A deep groove is cut out longitudinally, and slighter 

 grooves mark the places from which the barbs project. These grooves are in all 

 probability purely ornamental. The opposite side is worked smooth, but shows 



* Figured and described in Professor Wyman's article quoted on p. 143. 



