io8 



THE CHAIN OF LIFE. 



Fig. 99. — Lepidodendron corrugaUon (Dn.). A characteristic Lycopod of the Lower 



Carbuniferous of America. 



A, Restoration, b, Leaf, natural size, c, Cone. d, Leafy branch, e, Forms of 

 leaf-bases. F, Sporangium. I, L, M, N, o, Markings on stem and branches, in 

 various states. 



