84 MR. C. T. TRECHMANN ON 



Plate IV. 



Fig, 1. Scraper, dark flint. Semicircular form. 



,, 2. Scraper or thumb flint, a characteristic specimen. Brown trans- 

 lucent flint. 



,, 3. Scraper, bluish flint. 



„ 4. Scraper, grey mottled flint. Worked to a semicircular edge. 



,, 5. Scraper. Rough specimen in brown flint. 



,, 6. Scraper. A flake taken from outside of a nodule of flint and 

 worked to a semicircular edge. 



,, 7. Scraper. A very small and delicately worked specimen. Grey 

 flint. 



,, 8. Scraper. "Duck bill" form, showing crust of pebble. Dark 

 flint. 



,, 9. Scraper, pink flint with crust of pebble. 



,, 10. Flake, grey flint worked to a triangular almost arrowhead form. 



,, II. A similar specimen with less secondary chipping. 



,, 12. Knife, dark translucent flint, flaked and notched. 



,, 13. Flake, with both edges trimmed. Grey flint. 



,, 14. Flake in white translucent flint. 



,, 15. Borer, curved point, worked along one edge. 



,, 16. Scraper-like implement, possibly a knife. Yellow opaque flint. 



,,17. A symmetrical flake of lower carboniferous chert. 



„ 18. Hainmerstone, quartzite, bruised at both ends. 



,, 19. Flake, showing part of crust of flake nodule and scar of another 

 flake. 



All the specimens figured on Plate IV. are from Blackton in Teesdale. 



Plate V. 



Fig. I. Arrowhead. Opaque grey flint. 



2. Arrowhead. Pink flint, bleached white by exposure. 



3. Arrowhead. Bleached to a glossy white surface. 



4. Arrowhead of unusual fineness. Black translucent flint. 



5. Arrowhead. Black translucent flint. 



6. Arrowhead, leaf shape. Brown mottled flint. 



7. Flake or splinter. Yellow flint worked to a point. 



8. Flake worked to a point. 



9. Splinter of brown flint, worked to a curved cutting edge. Possibly 

 a form of arrowhead. 



