GEOLOGY OF FOLKESTONE — THE GAULT, 



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its immense calcareous deposits. Nitcida pectinata and Nucula ovata 

 are also common and cliaracteristic bivalves of tlie gault. 



Lign. 28.— Nucala bivirgata. Lign. 2Q.—Niicida ornatissima. 



And of the genus N'ucula we figure also two other species, which 

 are occasionally to be found, which, from their peculiar and beautiful 

 ornamentation, can be readily determined. 



Lign. 30. — FUcatida pectenoidea. 



Lign. 31. — Odrea Eauliniana. 



Amongst the other bivalves which the collector is likely to include 



