Revieivs — DawsorCs Acadian Geology, 



331 



and structures preserved together may check the imagination, and 

 cautious inductions on their affinities may come very near to a de- 



rm. 1. 



A. Megaphyton maffnijicwn, Dawson, restored.* 



B. Leaf-scar of the'same, two-thirds nat. size. 

 B.i Row of Leaf-scars, reduced. 



C. PaJceopteris Harltii, Dawson, scars half nat. size. 



D. Palceopteris Acadic, Dawsona, scars half nat. size. 



1 We are indebted to the publishers of the *' Acadian Geology " for the use of this and the 

 three other woodcuts from that work. 



