54 

 CHEIROPLEURIA:— 



Fig. 92. Cheiropleuria bicuspis; a, proximal face (x 1000); b, sclerine strati- 

 fication (X 2000); c, distal face (x 1000). 



CHRISTENSENIA: see Fig. 144 D, p. 79. 



CIBOTIUM:— 



Fig. 93. Cibotium barometz, proximal face (x 1000). a, lateral view (x 250); 

 h, distal face (x 250). 1 and 2, respectively, are identical. 



