1844.] 413 



Thickness and Description of Strata. 



Thickness 

 No. in feet. 



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



Chme - ...----3 



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



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



27. Gryphaa at the top, with dark sand - - - - 3 



26. GryphcecB at the top, with dark sand containing Terebratulse, Echini, 



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



25. Gryph(B(B at the top, with dark sand - - - - 9 



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

 on the shore. ) 



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



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



with dark sand - - - - - - -7 



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



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



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



Gryphaa irregularly placed - - - - - 3 



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



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



with clay under, very fossiliferous - - - - 34 



19.' 

 18. 

 17. 

 16. 

 15., 



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

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



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



Terebratula, &c. &c. - - - - - 16 



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



1 3. Zone of Gryphaa ; below red sand and clay, full of Gryplicea, Ostrece, 

 Terebratula, Pectens, SerpuJa, &c. &c. &c. very fossiliferous, and in 

 some places divided into four zones of Gryphceai - - 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 - - - - 12 



(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 



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



