442 



THE CAKBONIFEKOUS SYSTEM. 



Fig. 163. — Calamites. 



A, Calamites Suckovii, restored. 

 A 1 , Foliage. 



A 2 , Ribs and scars. 



A 3 , Roots. 



A 4 , Base of stem. 



B, Calamites Cistii, restored. 



B 1 , Leaves. 



B 2 , Leaf enlarged. 



C, Leaves of C. nodosus. 

 C 1 , Whorl enlarged. 



D, Structure of stem. 



E, Vessels magnified. 



