MONOGRAPH 



LIAS AMMONITES 



THE BRITISH ISLANDS, 



THOMAS WRIGHT, M.D., F.R.S., F.G.S., 



VICE-PRESIDENT OF THE PAL^ONTOGRAPHICiL SOCIETY; CORRESPONDING MEMBER OF HIE ROYAL SOCIETY OF SCIENCES 



OF LIEGE; THE SOCIETY OF NATURAL SCIENCES OF NEUCHATEL; VICE-PRESIDENT OF THE COTTESWOLD 



naturalists' FIELD CLUB; CONSULTING SURGEON TO THE CHELTENHAM HOSPITAL; 



AND MEDICAL OFFICER OF HEALTH TO THE URBAN SANITARY DISTRICTS 



OF CHELTENHAM, CHARLTON KINGS, AND LECKHAMPTON. 



PART THIRD— CLASSIFICATION. 



PAaES 165— 264; Plates XIX— XL. 



LONDON* 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1880. 



