138 THE MEDALS OF CREATION. Cuap. VI. — 
of their stems, occasioned by the angular scars left by the 
separation of the foliage, as is the case in arborescent ferns: 
Lien. 39. Fig. 1.—A TERMINAL BRANCH OF A LEPIDODENDRON; nat. 
2.—Leaf-scars on the stem of a Lepidodendron; nat. 
In Coal-shale, Newcastle. 
the term, however, simply indicates the appearance, for 
the surface is not imbricated. Some of these trees have 
been found almost entire, from the roots to their topmost 
