TAB. X. 



Caudal vertebrae of the Hylaeosaurus, one sixth nat. size. 



Fig 

 1. 

 2. 

 3. 



Ten vertebrae from the base of the tail. 

 Eleven vertebras from near the end of the tail. 



Under view of anterior caudal vertebra?, showing the form, and place of articula- 

 tion, of the haemapophyses. 



4. Back view of a haemal arch from the same (A) region of the tail (half nat. size). 



4'. Under view of middle caudal vertebrae, showing the shape of the haemapophyses, h. 



5. Side view of a haemal arch from a middle caudal vertebra (half nat. size). 



6. Under view of caudal vertebrae beyond the middle of the tail. 



7. Back view of a haemal arch from one of these vertebrae (half nat. size). 



The further modification of the haemapophyses in the posterior caudal vertebras 

 is shown in fig. 2. 



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



