PLATE I. 



Fig. 1. Schizoneura planicostata. (Catamites planieostatus, Rogers). Pages 14 to 18. 

 Fig. 2. Rhizoino of Equisetum Eogersi. ? Page 11. 

 Fig. 3. Internal cast of Schizoneura, spec. ? Page 16. 

 Figs. 4-6. Schizoneura Virginiensis, spec. nov. Page 17. 



Fig. 4. Portion of a stem showing several nodes. 



Fig. 5. Fragment of a smaller stem with broader leaves 



Fig. 6. Leaf of full size of the broader kind. 



