FLINT IMPLEMENTS AND PALiEOLITHS 87 



lateral surface (R.L.S.) will also be delineated. A sectional 

 drawing of each implement will also be given. 



The " keel " of the specimens exhibiting this feature will be 

 indicated clearly, and the author thinks that the drawings will 

 be readily understood by the reader. The arrows marked in 

 on the flake-areas of the specimens indicate the direction of the 

 blows which removed the flakes. 



Fig. 1 . — The most primitive type of flint implement known 

 is here represented. It is simply a more or less tabular piece of 



ANT 



ANT 



?o^T 



Post 



sect von. 



rW 



Fig. 1. 



flint, the dorsal surface of which exhibits unflaked cortex, while 

 the ventral surface shows the hard interior of the flint which 

 has become exposed owing to a clean thermal fracture. On 

 one side of this flat thermal fracture surface blows have 

 been delivered and flakes removed, so that a hollow has 

 been produced in the edge of the stone, which encroaches 

 on the dorsal surface. It will be noticed that all the arrows 

 marked in on the flake areas of this hollow, which forms part 

 of the left lateral surface of the implement, point away from 



