4 NOTES ON A CHIPPED BOULDER. 



which is, however, somewhat lighter on the planes of 

 fracture than on the original crust. 



2. THE SPALLS. — I collected altogether 39 frag- 

 ments, weighing 2lbs. i^jAoz. in the aggregate, which 



apparently were struck off this core ; and 34 could be 

 replaced in their original position. It is very probable 

 that the remaining 5 fiakes belong to the same specimen, 

 but too much is missing to permit them to be fitted 

 together with the others. However that may be, the 

 fact that 34 liakes, weighing 2lb. 12V2OZ., could again 

 be replaced in their original position, is of the greatest 

 interest. 



The flakes vary, of course, in size and shape ; but on 

 the whole they are of a lamelliform character — that is to 

 say, of comparatively small thickness. Most of them 

 show a fine bulb of percussion, and it may be said that 

 almost every one of them could have been used as an 

 implement. I select only two — the largest and the 

 smallest — for description. The largest measures 5 inches 

 in length, and exhibits a fine, smooth pollical face ; its 

 general outline is somewhat triangular, the base broad, 

 and pointed at the opposite end. The two lateral edges 

 are sharp ; the indical face shows a g'ood deal of flaking ; 

 the smallest flake measures about 2^4 inches, and is of 

 irregular circular shape ; the edges are very sharp ; the 

 pollical face shows a fair bulb of percussion ; the indical 

 face is flat, but shows no traces of chippins:. Weight, 

 80Z. 



3. THE FRAGMENT WHICH W\-\S USED AS 

 AN IMPLEMENT.— Unfortunately this is missing— 

 in fact, it can hardly be expected that this were pre- 

 served, as it was evidently the desired object and in 

 whose manufacture the pebble was broken. By refitting 

 the fragments to their original place, the general out- 

 line of this missing fragment could, however, be ob- 

 tained by filling up the empty space with plaster of 

 Paris or any other suitable material. This showed that 

 the flake, which was apparently desired for an imple- 

 ment, was of triangular shape, and rather thin. It 

 measured about 4 inches by 25^, was Inroad at the base, 

 and sharply pointed at the opposite end. The lateral 



