458 



THE CARBONIFEROUS SYSTEM. 

 Fig. 172. — Cordaites and Dijplotegium. 



A, Cordaites borassifolia restored. 

 A 1 . Portion of stem. 



A 2 , Portion of leaf, enlarged. 



A 3 , Base of leaf. 



A 4 , Point of leaf. 



A 5 , Transverse section of stem, showing axis. 



B, Fragment of stem of Diplotegium retusum. 

 B 1 , Scar of do. enlarged. 



