1926 



SYSTEMATIC 



35 



Beds which bear the same number as a hemeral term may be 

 considered as dated on fairly satisfactory evidence : those not numbered, 

 but placed more or less on the same level, are suggested as possibly 

 isochronous, but the suggestions require further proof. 



Table VIII — Chronology and Correlation 



Swindon 



37- 



Isle of Purbeck 



Creamy 



Limestone 

 Roach 



Blue Bed 



{Briareites ?) 



Cap Spengel 



Whit Bed or 

 (u)poN Free- 

 stone 



Chert Vein 



LiSKY Bed 

 (white, soft) 



Cap 



Base Bed, or 

 Bottom Free- 

 stone 



Chert Beds 



Cockly Bed 22. Shell Bed 

 Sandy Limestone 



10. subvariabilis 

 9. LingiJa 



