448 



THE CARBONIFEROUS SYSTEM. 



Fig. 167.— Tree Ferns. 



A, Megaphyton magnificurn, restored. B 1 , Row of Leaf-scars, reduced. 



B, Leaf-scar of the same, § nat. size. C, Palseopteris Harttii, scars half nat. size. 



1), Palseopteris Acadica, scars half nat. size. 



