46 



STIGMARIA FICOIDES. 



Xylograph 7. 



XVI 



The above xylograph represents accurately the arrangement of these roots as 

 seen from above ; it is reduced from a large plan carefully prepared by Chas. 

 Brownridge, F.G.S., for Mr. Adamson, F.G.S., the Secretary of the Geological 

 Society of Leeds, who has kindly allowed the above reduced figure to be 

 copied from it by photography. As the preceding pages have shown to be almost 

 invariably the case, four large primary roots, A, B, C, and D, radiate from a large 



