MONOGRAPH 



ON 



THE FOSSIL REPTILIA 



OF THE 



CRETACEOUS FORMATIONS. 



SUPPLEMENT No. IV. 



Pages 1—18 ; Plates I— IX. 



SAUEOPTEEYGIA (Plesiosaurus). 



BT 



PROFESSOR OWEN, D.C.L., F.R.S., E.L.S., E.G.S., &c. 



Issued in the Volume for the Year 1862. 



LONDON : 

 PEINTED FOR THE P AL^ ONTO GE A PHI C A L SOCIETY. 



1864. 



