THE CARBONIFER(>DS FLORA. 



129 



Fio. 56. — Tree-ferns of the Carboniferous, a, MegapTiijton mnrfnificum, 

 \ Dawson, restored, b, Leaf-scar of the same, two thirds natural size. 



V B' Row of leaf-sears, reduced, c, I'uLvopterU Ihrtii^ f^Q&xH h&M iiixi\x- 



ral size, d, Jiilceopteris Acadica^ scars half natural size, 



18 



