PRE-CARBONIPEROUS PLANTS. 



n 



neous black cherty mass, only faintly marked with a longitudinal striatioa 

 parallel to the fibres. It then presents its structures in a perfection unsur- 



Trunk of Prototaxiies Logani, eighteen inches in diameter, and Branch, as seen in the cliff near- 

 L'Arut Brehaut, Olatpf. 



as 



jeds, 



that 



ie to 



3d in 



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Trunk qf Prototaxiies Logani, nearly two feet in diameter, as seen in the cliff near Little Cape' 

 Oiseau, Gasp4. 



passed by any fossil wood known to me. In other cases the infiltrated 

 silicious matter has a granular character, and the texture is destroyed or 

 broken up in such a manner as to resemble a coarse cellular structure - 



