244 



M ELAN I A. 



HELICINA. 

 CARDITA, 



MYA. 



PECTEN. 



striata 47 



Heddingtonensis 

 sulcata 39 



compressa 



lirata 



obtusa 



similis 



lunulata 



producta 



abrupta 



striata 



deltoidea 



10 



197 



232 



89 



197 



tuberculata 143 



scripta 224 



angulifera 



literata 



mandibula 



plana 



intermedia 



subangulata 



lata 81 



fibrosus 



136 



LIAS. 



ditto. 



Upper oolite. 

 London clay. 

 LIAS. 



ditto. 

 LIAS. 



Lias. Cornbrash. 

 Under oolite. 



ditto. 



ditto. 



Ditto. Cornbrash. 

 Great oolite. 



ditto. 



Cornbrash, Kelloway stone. 

 Green sand. 

 LIAS. 



Lias. Kelloway rock. 

 Fullers' earth bed, near Bath. 

 Grey limestone, near Scarbro'. 

 Green sand. 



Sand under London clay. 

 London clay. 



ditto. 

 Crag. 



UNDER OOLITE. 

 5 Under oolite. Cornbrash. 

 I Kelloway rock. 



