PLATE LXVI. 



Omphalophloios ctclostigma Lx. sp. 



(Page 218.) 



Fig. 1. Impression of olA stem in which the bosses are crushed, with iiifoliled cortex upon the holster 

 surface. This is one of the originals described by Professor Lesquereux as Lepidodendron 

 cyclosHgma. Lacoe collection, U. S. Nat. Mub., 5502. 

 la. Enlarged detail of bolster of the same, x 2. 



2. Cortex from which the epidermis has partly been removed. The bosses, resembling Lepido- 



deudroid leaf scars, are not so compressed as in the other cases. U. S. Nat. Mus., 6025. 

 2o. Detail of bolsters from No. 6025. X2. 



3. Impression of young trunk, to which the epidermis has adhered. The form of the bolsters is 



obscured by the prominent large bosses, in which may he seen the small raised oval bosses. 

 Collection of Dr. J. H. Britts, Clinton, Missouri. 

 3a. Detail of bolsters of the same. x2. 



4. iToung stem, or branch, with rounded cortical depressions in the lower portion. The aspect 



of the partially decorticated stem is also seen. The photograph is inverted on the plate. 

 U. S. Nat. Mus., 6027. 

 ia. Detail from the same. 



5. Fragment of young branch from which the epidermis has been removed. U. S. Nat. Mus., 6028. 



442 



