THE CARBONIFEROUS FLORA. 



127 



Fio. 52. — Alethopteris grandia (Dawson). Middle ooal-fonnation of Nova 

 Scotia. 



Pio. 58. — OyclopterU (Anmmies) Aoadiea (Dawson), a tree-fern of the 

 Lower Cfarboniferous. a, Pinnules, b, Fragment of petiole, c, Ee- 

 m^B of fertile pinnules. 



