MONOGRAPH 



LIAS AMMONITES 



THE BRITISH ISLANDS. 



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



VICE-PRESIDENT OF THE PALiEONTOGEAPHlCAL 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 LECKHAMPION. 



PART SECOND— THE LIAS FORMATION. 



Pages 49—164: Plaies IX— XVIII. 



LONDON: 



PRINTED FOR THE PAL^SIONTOGRAPHICAL SOCIETY. 



1879. 



