A MONOGRAPH 



OF THE 



MOLLUSCA FROM THE GREAT OOLITE, 



CHIEFLY FROM 



MINCHINHAMPTON 



AND 



THE COAST OF YORKSHIRE. 



BY 



J. MORRIS, F.GLS. and JOHN LYCETT. 



PART I. 



UNIVALVES. 



LONDON : 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1850. 



