Reviews — BatvsorCs Acadian Geology, 



335 



whether the appearance in the fossil which Brongniart considers as 

 representing medullary rays are really so or not. The relation of 



A. Lepidodendron corrugatum, Dawson, restored. 



B. Leaf, nat. size. 



C . Cone and branch. 



D. Branch and leaves. 



E. Various forms of leaf areoles. 



F. Sporangium. 



G. Scalariform vessel, mas^nified. 



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



N. Ditto of old stem. 



O. Decorticated stem [Knorria). 



