22 THE GEOLOGICAL HISTORY OF PLANTS. 



fruits, in the Denbighshire grits, at the base of the Si- 

 lurian.* 



FIG. 2. NematopJiyton Logani (magnified). Vertical section. 



From comparison of this singular wood, the structure 

 of which is represented in Figs. 2, 3, 4, with the debris 



FIG. 3. NematopJiyton Logani (magnified). Horizontal section, showing 

 part of one of the radial spaces, with tubes passing into it. 



of fossil taxine woods, mineralised after long maceration 

 in water, I was inclined to regard Prototaxites, or, as I 



* "Journal of the Geological Society," August, 1881. 



