356 GEOLOGY OF THE ISLE OF PURBECK. 



observed before, — both slabs were preserved; and 

 Mr. Trotter, who casually visited the place, pur- 

 chased them, and presented them to me. These 

 slabs measure 3 feet 10 inches by 3 feet, and are 

 a few inches in thickness. Many of the bones 

 were split asunder in separating the stone, others 

 were deeply imbedded, and of a few, imprints 

 alone remained. Much labour and care were 

 required to unite the severed parts of the bones, to 

 develop the others, and bring the specimens into 

 the state in which they now appear. On one slab, 

 a considerable portion of the left side of the lower 

 jaw, with two teeth, is preserved; and several teeth, 

 and numerous dermal or skin-bones, of a very 

 peculiar form, are dispersed about the stone.* 

 The bones of the pelvis, and some of those 

 belonging to the extremities, with many caudal 

 and dorsal vertebrae, and chevron bones, are im- 

 bedded in the same slab. The corresponding 

 piece of stone bears the impression of the portion 

 of jaw, and contains numerous dermal bones, 

 vertebra?, &cf Teeth and dermal bones of this 

 reptile were among my earliest discoveries in 



* These dermal bones are figured in Medals of Creation, vol. ii. p. 702. 



t The .slab first described is figured in the Wonder* < if Geology, vol. i. pi. i. 

 Botb specimens are now placed in an upright glass case against the wall, near 

 the doorway of the room containing the remains of the Iguanodon and other 

 Sauriaus, in the Gallery of Organic Remains, in the British Museum. 



