MONOGRAPH 



ON 



THE FOSSIL REPTILIA 



OF THE 



LONDON CLAY. 



PART I. 



CHELONIA. 



BY 



PROFESSOR OWEN, F.R.S. F.L.S. F.G.S. &c. 



PROFESSOR BELL, Sec.R.S. F.L.S. F.G.S. &c. 



LONDON: 



PRINTED FOR THE PAL^ONTOGRAPHICAL SOCIETY. 



1849. 



