40 



PETRIFACTIONS AND THEIR TEACHINGS. 



CHAP. I. 



fossils in Cases D, E, and F, which are respectively labelled 

 Lepidodendron, and Stigmaria. 



Besides the fine specimens of Stigmarise in the cases above 

 referred to, there is an instructive example of these trailing 



LlON; 13. PORTION OF A BRANCH OF LEPIDODENDRON: IN COAL SH4LE, 

 NEWCASTLE. 



Fig. 2. A scar of a petiole. (Nat. size.) 



roots, twenty-six feet long, attached to a board, placed over 

 the doorway of Room I. at the entrance from the Zoological 

 Gallery. 



Calamitia.Case E. On the left hand of the lower com- 

 partment, there are placed on some shallow ledges, many spe- 

 cimens of the silicified stems named Calamitia by M. Gotta 



