EXPLANATION OF PLATE VI. 



Ancient Stone Implements, New Guinea. 



Fig. 1. Stone Mortar of mica schist, weighing 30 lbs. Yodda Valley 

 Goldfield. 



2. Dagger-shaped object of clay-stone, weighing 3 lbs. Yodda Valley 



Goldfield. 



3. Slab of basalt weighing 62 lbs. from Boianai, Goodenough Bay, 



with spiral incised motive. 



