TAB. VII. 



The body of the fourth sacral vertebra of a young Iguanodon ; nat. size. 



Fig. 



1 . Side view. 



2. Front view. 



3. Under view. 



4. Upper view, showing the place of the escape of the sacral 



nerves at o o. 



From the Wealden of Tilgate Forest, Sussex. In the British Museum. 



