ROOM 



SIGILLABIA. 



37 



these roots were unquestionable Stigmariae ; the tubercles with 

 the attached rootlets (the supposed leaves), being clearly 



This stem is a solid cast in claystone, the carbonized bark retaining the character- 

 istic markings, only remaining in a few places. 



c, the decorticated part of the stem, which is covered with minute scales as far as 

 the point k, which is a few inches below the first ramification of the roots. The car- 

 bonaceous crust that enveloped the roots was thick at the upper part, but gradually 

 became thinner towards the extremities, and at a, and b, was a mere pellicle that fell 

 off on the slightest touch. 1 



Journal of the Geological Society of London, 1847 and 1849. 



