ANATOMY OF CERTAIN SPECIES OF ENCEPHALAETOS. 459 



Encephalmios Altensteinii, Lehm. 

 Fig. 6. Transverse section of a mucilage-canal in the ])ith, surrounded by bundles. X 35. 



Encephalartos horridus, Lehm. 



Fig. 9. Diagram of a transverse section of a small part of the vascular ring from the transitional region 

 between stem and root, showing a series of more or less primitively-constructed strands in the 

 cortex, which represent the successive vascular rings of the higher part of the stem ; also a 

 medullary bundle. 



Encephalartos sp. 



Fig. 2. Segment of a transverse section of the stem, showing the general structure, viz. medullary 

 bundles, vascular rings, and leaf- trace bundles. Nat. size. 



