TJie Igumiodon in the sands of the chalk. 



359 



Fig. 2, represents one of the four enormous caudal vetebrae of the 

 Iguanodon, one fourth the size of the original, of which I have an 

 interesting specimen consisting of four caudal vertebrae with one 

 chevron bone ; the largest vertebra is twenty four inches in circum- 

 ference : these vertebra) belonged about the middle of the tail of the 

 Iguanodon : if the vertebrae in this part were eight inches in diame- 

 ter, what would they have been when invested with their muscles 

 and integuments, and we may well exclaim — what a monster ! 



Fi2. 2. 



Fig. 3. This represents the thigh bone of the Iguanodon, which 

 is very peculiar ; the two |)rocesscs or trochanters are most remark- 

 able : do we know any thing like them ? The cleft between the 



