PLATE XIV. 



Fig. 1. — Portion of a polished slab of Actino stroma stellulatum, Nich., from 

 the Middle Devonian, Lummaton, Devonshire, of the natural size. (Page 140.) 



Fig. 2. — Portion of another polished slab of the same species, from the 

 Middle Devonian Limestone of Dartington, Devonshire, of the natural size. The 

 specimen is composed of parallel columns, each of which is traversed by one 

 of the vertical canals of the astrorhizal system. Presented to the author by Mr. 

 Champernowne. 



Fig. 3. — Tangential section of Actinostroma stellulatum, Nich., enlarged 10 — 12 

 times. The specimen is a massive one. Middle Devonian, Teignmouth, Devon- 

 shire. 



Fig. 4. — Vertical section of the same specimen, similarly enlarged. The larger 

 rounded openings are the cut ends of the radiating astrorhizal canals. 



Fig. 5. — Tangential section of a laminar example of the same species from 

 Grerolstein, similarly enlarged. The section shows numerous capillary " arms," 

 given off from the radial pillars. 



Fig. 6. — Vertical section of the same specimen, similarly enlarged. 



Fig. 7. — Tangential section of an example of the same species from the Middle 

 Devonian of Dartington, similarly enlarged. The specimen is formed of numerous 

 parallel columns, and the section shows part of the centre of one column. 



Fig. 8. — Vertical section of the preceding specimen, similarly enlarged. The 

 art figured embraces half of one of the columns. 



