146 SOME PREHISTORIC ARTEFACTS FROM NEW GUINEA 
Althougti Lihir is a volcanic Island, obsidian is not found 
there. 
The implement, which measures 7f by 5| inches, is made 
from a large flake. The secondary chipping has been done 
from both front and back, so that the edge is in the medial 
plane. The bulb of percussion has been removed, but was 
approximately at the point A in Pig. 4. The side B-C has 
been formed by a single fracture which is not an accidental 
break, since it would be impossible to break the flake here 
ij 2 j 3j 4| 5| e| Inches 
Fig. 4. Obsidian Fish-hook, Lihir Island. 
after the hook had been shaped. The sharp upturned edge 
of the fracture has been slightly trimmed down at D-D. 
That this remarkable artifact is indeed a fish-hook, is 
clearly shown by its similarity in form to certain fish-hooks 
from the Carolines. Fig. 5 shows three types of hook used at 
Nukuor, a small island south of the Mor'tlock group. Nos. 1 
(6) and 2 (7) are of pearl shell and are of a type peculiar to 
this island. Nos. 3 (7) and 4 (8) are of turtle shell, and are 
types which were used also in other parts of the Carolines. 
Although it is much larger, the Liliir hook is strikingly similar 
in form to Nos. 1 and 2. These latter, however, lack the projec- 
tion opposite the point, but such a projection (the lug to which 
the line is attached) is present in the other two types. In 
