PLATE XV. 



FIG. 1. A polished slab of Yorkshire entrochal, or encrinal marble, shewing different sec- 

 tions of the vertebral column. 



2. The pentagonal base of the cap encrinite of Derbyshire. 



3. A specimen of encrinal marble, shewing the manner in which the fragments of the 



column are disposed in relief on the exterior surface, both in the Yorkshire and 

 the Derbyshire marble. 



4. A part of a large vertebral column belonging to the turban, or Shropshire, en- 



crinite. 



5. A part of the vertebral column, with the base, or organ of attachment, of the 



turban encrinite. 



6. The screw-stone, or rather pulley-stone, being casts of the internal parts of the 



vertebral column of the cap encrinite. 



7. A piece of marble from Shropshire, in which is discovered a part of the pentagonal 



base of the turban, or Shropshire, encrinite; the difference observable between 

 which and that of the lily encrinite, Plate XIV. Fig. 2, and that of the cap 

 encrinus, Plate XV. Fig. 2, shews plainly that this must have belonged to 

 another species. 



8. A small vertebral column of the turban encrinite. 



9. The superior or body part of the cap encrinite of Derbyshire, and perhaps of 



Yorkshire. 



