450 



PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [April 18, 



features. I am indebted to Sir E. Lacon and Co. for the opportunity 

 of inspecting this, and the interesting series of specimens. The 

 folio-wing description of them I made on the spot, in company with 

 Mr. Gunn and Mr. Rose. 



One column gives the specimens as read off previous to my having 

 formed any definite conclusion ; and in another column is added the 

 geological structure which the examination of the specimens in con- 

 junction with the coloured section led me to surmise. From the 

 nature of the work, the shells are necessarily small or fragmentary. 



Depth. 



Feet. 

 1 



to 

 50 

 58" 1. 



109 



Nature of Specimens. 



Ill 



113 



4. 



123 



5. 



150 



6. 



156 



7. 



158 



8 



160 



9 



161 



10 



166 



11. 



170 12. 



180 



13. 



190 



14. 



200 



15. 



210 



16. 



220 



17. 



230 



18. 



240 



19. 



240-50. 20. 



250 



21. 



260 



22. 



270 



23. 



280 



24. 



291 



25. 



294 



26 



300 



27. 



309 



28. 



320 



29. 



330 



30. 



340 



31. 



Coarse light-coloured sand, with 1 specimen of " 

 Ostrea edulis, 2 of the Cardium edule, 1 

 each of Corbula nucleus, Tellina Balthica, and 

 T. planata. 



Light-grey clay with a few pebbles of quartz, 

 fragments of Cyprina Islandica, 1 Tellina, 

 and 1 fragment of Pecten opercidaris. 



Yellowish shelly sand with fragments of small 

 Tellincs. 



Fragments of commiimted shells, none perfect. 



Light-coloured shelly sands. 



Light-grey shelly sands. 



The same, coarser, with concretions and a few 

 flints. 



Laminated micaceous grey clay. 



Light-brown clay. 



Grey clay and sand, with shells; Tellina (same 

 as in No. 2), 1 fragment of Mytilus edulis. 



Grey clay, with undeterminable fragments of 

 shells ; 1 valve of Balanus. 



Light-brown clay and small light-coloured con- 

 cretion (like those in the London Clay). 



The same, one concretion. 



Tough brown clay. 



The same, slightly greyer. 



The same, one concretion. 



The same, slightly variegated*. 



Brownish-grey clay. 



Dark-grey clay. 



The same, with 2 lumps of iron-pyrites and 

 2 small calcareous concretions. 



Grey clay. 



The same, darker and more compact. 



The same, ,, „ 



The same, ,, „ 



The same, browner ; iron-pyrites. 



The same, with wood and decomposing iron- 

 pyrites. 



Brown clay. 



Light-grey sandy clay. 



Greenish sandy clay. 



Streaked brown clay. 



Greyish-brown clay. 



Blown 1 , „ , 



BW.-»twf 



SHINGLE. J 



Eecent 

 estuarine 

 deposits. 



120 



feet. 



London 

 Clay. 



310 



feet. 



* Possibly caused by the boring tool. 



