X] 



EUCALAMITES. 



377 



Weiss' has subdivided this species into several ' forms/ which he 

 bases on the number of branch-scars on each node and on other 

 characters; a more extended subdivision of C. cruciatus has 



Fig. 102. Calamites (Eucalamites) cruciatus, Sternb. 



From a specimen in the Barnsley Museum, Yorkshire. | nat. size. 



1 Weiss (84), p. 96. 



