﻿FRAAS ON THE JURA FORMATION. 79 



Jurassic Series in 



Burgundy. 



Neocomian. 



Portlandian Lime- 

 stone. 

 Exogyra virgula. 



Kimmeridgian 

 Schistous Lime- 

 stone. 



Perna. Pinna. Am.gi- 

 gas. 



Diceras. Corals. 

 Corallian. 



Argovian Group. 

 T. lacunosa. Spongia, 



Normandy. 



Greensand. 



Honfleur Clays. 



Mya. Trigonia. 

 Coral Rag Oolite. 



Ter. insignis. Cidaris, 

 Hemicidaris. 



South-England. 



Hastings Sand. 

 (Purbeck Stone.) 



Portland Stone. 



A. biplex. Buccinum 

 naticoides. Terebra 

 Portlandica. Trigo- 

 nia incurva. Perna. 



Kimmeridge Clay. 



Ostrea deltoidea. 

 Plants. 



Coral Rag Oolite. 



Cidaris. 

 {Heddington, &c.) 



Calcareous Grit. 



North-England. 



Greensand. 



Kimmeridge Clay. 

 Plants. 



Oolite. 



Turbinolia. Caryo- 

 phyllia. 



Coral Rag. 



Astrsea. Apiocrinus 

 Milleri. Cidaris. 



Calcareous Grit. 

 Am. perarmatus. 



