A MONOGRAPH 



OF THE 



MOLLUSCA FROM THE GREAT OOLITE, 



CHIEFLY FKOM 



MINCHINHAMPTON 



AND 



THE COAST OF YORKSHIRE. 



BY 



J. MOERIS, F.G.S. AND JOHN LYCETT. 



PART 11. 



BIYALVES. 



LONDON - 



PRINTED FOR THE PAL.EONTOGRAPHICAL SOCIETY. 

 1853. 



