614 P. W. KNOWLTON MESOZOIC FLORAS OF THE AMERICAS 



America, Central America, and the entire length of South America; but 

 the fact that the obvious affinity of this flora is with the floras of India, 

 Europe, and thence to England, rather than with western America, leads 

 me to think it at least possible that the land bridge over Antarctica was 

 still existent. 



