64 J. G. WALLER ON SAND. 



4. Middle London Clay. White Cliff Bay. 



5. Middle London Clay. Alum Bay. 



6. Base of Bournemouth Series. Alum Bay. 



7. Base of Bournemouth Series. Alum Bay. 



8. Bournemouth Beds. White Cliff Bay. 



9. White Cliff Bay. 



10. Studland Beds. Alum Bay. 



11. Hengistbury. 



12. Hengistbury. White Sand. 



13. High Cliff. 



14. Cruch Barrow. 



15. Cruch Bai'row. 



16. Lower Boscombe Beds. White Sand. 



17. Thanet Sands. Alum Bay. 



18. Upper Bagshot. Hendon Hill. 



Examined by polarized light give the following results : — 



1 . Quartz, grains medium size, clean, few flint grains. 



2. Quartz, grains generally small, a few larger, no rounding, flint 

 grains few. 



3. Quartz, grains clean, medium size, some conglomerate of fine par- 

 ticles, few flint grains. 



4. Quartz, grains small, irregular in shape, some opaque grains, flint 

 grains few and small. 



5. Quartz, grains generally small, intermingled with a few larger, all 

 ragged in outline. 



6. Quartz, grains small, minute particles, brilliant under polarized 

 light, very few and small grains of chalk flint, edges ragged. 



7. No material difference, but less of minute particles. 



8. "Very similar in character to 6 and 7. 



9. Quartz, clean, medium size, few flint grains, no rounding. 



10. Quartz, grains large, ragged edges, mixed with smaller grains, red 

 colour due to an oxide of iron. 



11. Quartz, grains large, rounded, brown grains caused by a cementing 

 of smaller ones together with a substance of that colour, a few flint grains. 



12. Quartz, grains lai^ge, not rounded, few and small flint grains. 



13. Quartz, grains not rounded, of medium size, some cemented to- 

 gether by a dark substance, few flint grains. 



14. Quartz, grains large, apparently once rounded by attrition and after- 

 wards broken by crushing ? some grains conglomerate of small particles. 



15. Quartz, grains large, some much rounded, as above (14). 



16. Quartz, grains generally large, some rounded, others irregular in 

 outline, and then smaller, some conglomerate of fine particles, very few 

 flint flakes. 



17. Quartz, grains variable in size, but generally small, very fine par- 

 ticles, also few flint grains. 



18. Quartz, grains variable in size, but generally small, like 6 and 7. 



