112 



Annals of the South African Mnseum. 



they are spherical or ovoid ; in the Mediterranean region they 

 are either spherical or pyriform, and better finished. The Atacama 



Fig. 14. 



Desert specimen, Fig. 159, does not differ much in shape from 

 South African ones, nor does the Tanganyka Plateau implement, 

 Fig. 158, which is, however, somewhat quadrangular. 



