370 



THE CANADIAN NATURALIST. 



[June 



Fig. 168. — Lepidodendron corrugation. 



A, Restoration. 



B, Leaf, nat. size. 



C, Cone and branch. 



D, branch and leaves. 



E, Various forms of leaf areoles. 



F, Sproangium. 



G, Scalariform vessel, magnified. 

 H, I, K, L, M, Bark with leaf-scars. 

 N, Do. of old stem. 



0, Decorticated stem (Knorria.) 



