THE 



PLIOCENE MOLLUSCA 



OF 



GREAT BRITAIN. 



INTRODUCTION. 



MoBK than sixtj years have elapsed since the pubhcation of the classical 

 Monograph on the Mollusca of the Crag by my old friend, Searles V. Wood, and 

 between thirty and forty years since that of the Supplements to it. Much fresh 

 material it seems desirable to describe has been obtained, especially from a new 

 and interesting section at the village of Little Oakley, near Harwich, midway 

 between Walton-on-Naze and Felixstowe. 



Many important works dealing with the Pliocene and Pleistocene, as well as 

 with the Recent Mollusca of various parts of the northern hemisphere, have 

 appeared, moreover, during recent years. Among these may be mentioned as 

 specially helpfid to students of the Crag, Prof. C O. Sars' ' Mollusca Pegionis 

 ArcticEe Norvegite ' (1878), Nyst's ' Conchyliologie des Terrains Tertiaires de 

 la Belgique ' (1878-81), Bellardi's ' Molluschi dei Terreni Terziarii del Piemonte e 

 della Liguria' (1873-88) continued by Prof. Sacco (1890-1904), Sign. CeruUi-Irelli's 

 'Fauna Malacologica Mariana' (1907-11), Fischer's 'Manuel de Conchyliologie' 

 (1880-87), Seguenza's ' Studii Stratigrafici sulla formazione pliocenica dell' Italia 

 Meridionale ' (1873-7), ' Mollusques marins du Rousillon ' by MM. Bucquoy, 

 Dautzenberg, and Dollfus (1882-98), ' Mollusques provenant des campagnes de 

 r Hirondelle et de la Princess-Alice dans les Mers du Nord ' (Monaco, 1912) by 

 MM. Dautzenberg et H. Fischer, ' Mollusques Pliocenes de la Vallee du 

 Rhone,' by M. Fontannes (1879-82), ' Conchyliologie du Miocene moyen du Bassin 

 de la Loire,' by MM. Dollfus and Dautzenberg (in course of publication), ' Den 

 Norske Nordhavs Expedition (Mollusca),' by Mr. Hermann Friele (1882-1901), 

 ' Prodromus Faunee Mediterrane£e,'vol. ii, by Dr. Carus (1889-93), ' Senglaciale og 

 Postglaciale nivaforandringer i Kristianiafeltet (Molluskfaunan),' by Prof. W. C. 

 Bv0gger (1900-1), 'Catalogue of the British Species of Pisidium,' by Mr. B. B. 

 Woodward (1913), ' Essais de Paleoconchologie comparee,' by M. Cossmann 

 (1895-1909), ' Iconographie der schalentragenden europaischen Meeresconcbylien,' 



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