196 PROCEEDINGS OF THE GEOLOGICAL SOCIETY, 



Thickness and Description of Strata. 



Thickness 

 No. in feet. 



29. Iron, fossiliferous, with dark sand. Above the boat-houses, Ladder 



Chine - ...___ 3 



(No. 19a crops out on the shore.) 



28. Gryphcece at the top, with dark sand - - - 8 



27. Gryphs.ce at the top, with dark sand - - - 3 



26. Gryphcece at the top, with dark sand containing Terebratula?, Echini, 



&c. &c. &c. - - - - - 4 



25. Gryphcece at the top, with dark sand ■• - - - 9 



(Nos. 15, 16, 17, 18, 19. Gryphcea and Crioceras nodules crop out 

 on the shore. ) 



24. Terebratulce at the top, with dark sand - - - - 30 



23. Nodules containing Crioceratites, a layer of Gryphcea under them, 



with dark sand - - - - - - -7 



(No. 14. or Scaphite nodules crop out on the shore.) 



22. Crioceras nodules; a zone of Gryphcea, with dark sand - 13 



21. Crioceras nodules, a zone of Gryphcea, with dark sand containing 



Gryphcea irregularly placed - - - - 3 



20. Crioceras nodules with Ammonites - - - - - 26 



1 9 a At the top black sand and clay, a zone of Gryphcea in the centre, 



with clay under, very fossiliferous - - - - 34 



19. 

 18. 

 17. 

 16. 

 15. 



f Crioceras nodules with zones of Gryphcece, dark sand between them 38 



(Nos. 13. 12. 11. 10. crop out on the shore below these zones.) 

 14. Nodules containing Scaphites ; Gryphcea zone under; Ostrea cari- 

 nata, &c. at the top of dark sand ; at the bottom layers of Serpulce, 

 Terebratulce, &c. &c. - - - - - -16 



(No. 8 crops out on the shore below.) 



13. Zone of Gryphcea ; below red sand and clay, full of Gryphcece, Ostrece, 

 Terebratulce, Pectens, Serpulce, &c. &c. &c. very fossiliferous, and in 

 some places divided into four zones of Gryphcece - - 22 



(No. 7. crops out on the shore.) 



12. Layer of Terebratulce, dark sand at the top, and a layer of small no- 

 dules and yellow sand at the bottom - - - - 22 

 1 1 . Dark clay, red at the top, and very fossiliferous - - - 20 



(No. 6. crops out on the shore.) 



10. Upper lobster bed, dark sand at the top, fullers' earth in the middle, 



and sand at the bottom, very fossiliferous - - - 45 



9. Upper Crackers ; nodules at the top, clay and sand, very fossiliferous 6 

 8. Lower Crackers; nodules at the top, full of Gervilliae, &c. &c, with 



brown sand and clay, fossiliferous - - - - 1 2 



(No. 4., or Perna Mulleti bed, crops out on the shore.) 



7. Lower lobster bed, fullers' earth, very fossiliferous - - - 29 



6. The best fullers' earth with clay at the bottom, some fossils, but not 

 very plentiful, and in some parts full of large crystals of sulphate 

 of lime - - - - - - - -64 



5. Layer of small nodules, clay at the bottom containing fossils - 6 



