PREHISTORIC CLASSIFICATION 281 



be subject to whatever alterations and additions further and 

 closer study may necessitate. 



Firstly, we have the geological horizons, or ages, commencing 

 with the mio-pliocene Lenham-Diestian. Then the pliocene, 

 pleistocene, and holocene periods respectively. 



Next the anthropic divisions : protoanthropic, palseanthro- 

 pic, and neoanthropic. 



Of the first we are scarcely in possession of sufficient know- 

 ledge at the present to make subdivisions. There are several 

 more points which must first be decided. But the industries 

 are well marked. The second I submit can well be divided 

 into a lower, middle, and upper. The lower to include the 

 pre-chellian ; the middle the chellian and acheulian, with their 

 subdivisions ; and the upper the mousterian with its sub- 

 divisions. 



The neoanthropic may naturally be divided into two ; a 

 lower and an upper, the line being drawn at the top of the 

 passage industry, the azilian, just below the holocene. 



Although a vast amount is known of the upper neoanthropic, 

 a perfect sequence has yet to be worked out ; certain well-marked 

 lithoclasiological industries are indicated in the last column. 

 Nothing but a vast amount of co-operative work will enable 

 us to form a satisfactor}^ classification. I feel convinced that 

 the adoption of some such a one as is here offered will remove 

 a vast amount of difficulties which now hamper alike the 

 prehistorian and the palaeontologist ; and offer a good working 

 basis in harmony with recent discoveries. 



