MONOGRAPH 



ON THE 



LIAS AMMONITES 



OP 



THE BRITISH ISLANDS. 



BY 



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



VICE-PRESIDENT OF THE PALvEONTOGRAPHlCAL SOCIETY; CORRESPONDING MEMBER OF THE 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 FOURTH— DESCRIPTION OF SPECIES. 



Pages 265—328; Plates XXII a, XXII b, XLI— XLVIII. 



LONDON : 



PRINTED FOR THE P AL M ONTO G R AP H I C A L SOCIETY. 



1881. 



