SECOND SUPPLEMENT 



TO THE 



MOSOGRAPH OF THE CRAG MOLLDSCA, 



WITH 



DESCRIPTIONS OF SHELLS 



FROM THE 



UPPEE TERTIABIES OF THE EAST OF ENGLAND. 



BY 



SEARLES V. WOOD, F.G.S. 



VOL. IV. 



UNIVALVES AND BIVALVES. 



LONDON: 



PRINTED FOR THE PAL^EONTOGRAPHICAL SOCIETY. 



1879. 



