﻿6 WEISS AND LOMAX, Lepidodendron selaginoides. 



secondary growth, in which case the lateral branch would 

 of course approximate to the main stem in structure. 



But in the two specimens before us, the structure in 

 the main stem and the lateral branch differs considerably 

 in the amount of secondary wood formed, while the 

 continuity of tissue is proof of the correctness of Binney 

 and Williamson's views as to the identity of the plant to 

 which these two kinds of axes belonged. 



