FLINT IMPLEMENTS AND). PALiEOLITHS - 95 



implements, which were made on precisely the same plan as the 

 pointed examples, owe their ovoid shape to the substitution of 

 a rounded cutting edge for the pointed end, and their evolution 

 may be due to the breaking off of the area indicated by crosses, 

 and the re-chipping of the broken end into a curve instead of a 

 point. Ovate palaeoliths often exhibit a " lateral platform," 

 which, as has been shown, is probably the remains of either the 

 dorsal or ventral surfaces of the rostro-carinate implement. 



?0ST. 



SECTION. 



UVTEWVL 



Figs. 6 and 7. 



The chief points of this r paper may be summarised as follows : 



(1) The most primitive implement known is a tabular 

 piece of flint with a hollow flaked out of one of its edges. 



(2) The next stage is represented by a similar piece of 

 tabular flint in which two opposing hollows have been fashioned 

 in its edges. The flake areas of these two hollows have con- 

 verged and formed a keel or gable, and have also inevitably 

 produced a beak-like profile at the anterior region of the 

 implement. 



