BARROW-DIGGING AT AiARTINSTOWN. ii 



bevelled off from both faces ; it shows indications of little or no 

 use. Depth 5'8 feet. 



12. An extremely fine flint borer (Plate III., No. 12), consist- 

 ing of a flint flake with a tapering and projecting spur, so fine 

 that it would serve admirably for boring the eyes of bone 

 needles such as have been frequently found in the French caves. 

 In this instance the two curved sweeps by which the boring part 

 of the tool is formed have been chipped from the opposite faces 

 of the flake, so that the cutting-edges are at opposite angles of 

 the blade, which is of rhomboidal section. Such a tool is, of 

 course, well adapted for boring by being turned in the hole 

 continuously in one direction. The secondary chipping extends 

 on both edges nearly to the base of the instrument. It is 

 composed of greyish-brown translucent flint. The bulb of 

 percussion is well marked on one face and exhibits a good 

 example of eraillure. The very tip of the borer appears to 

 have been broken off. Total length, 30 mm. ; width at base 

 26 mm. ; greatest thickness 6*5 mm. Found at a depth of 

 7-5 feet. 



13. Large, oval, flint scraper (Plate III., No. 13), of blackish- 

 brown colour, with secondary chipping at end and on one side ; 

 the bulb side presents a considerable curvature, to a depth of 

 6 mm. Found at a depth of 7 feet from the surface, at top of 

 the cairn of flints. 



14. Long, duckbill-shaped flint scraper, of a slaty colour, with 

 a "squared" scraping-edge, and a well-defined median ridge 

 running along back, giving a triangular cross -section to the 

 implement. Depth 8*2 feet. 



15. Portion of an implement of yellowish-brown translucent 

 flint, finely chipped on one face. Possibly the larger part of a 

 fabricator (Plate III., No. 15). Depth 4 feet. 



1 6. Broken flint implement, bearing excellent examples of 

 conchoidal fracture and ripple-flaking. The smooth face 

 exhibits a prominent bulb of percussion. Depth 6*7 feet. 



17. Black flint scraper, with a very obtuse bevelled edge at 

 upper end. Depth 7*8 feet. 



