PLATE IX. 



TORBANEHILL COAL. 



1. — Scalariform tissue abundant in the Stigmariae. 



2. — Horizontal section, showing the action of heat on the upper edge of 

 the section. 



3. — Vertical section, showing the relation which exists between dense 

 masses of vegetable tissue and the general structure of the coal. 



4. — Horizontal section, showing what appear to be bands of fibre with a 

 reticulate arrangement. 



5. — Vertical section passing through what appears to be a membranous 

 capsule, tubercular or hairy on the external surface, and smooth 

 within. 



6. — Horizontal section, showing another view of a similar body to the 

 last. 



