4 i6 STUDIES IN FOSSIL BOTANY 



a transverse striping is exhibited, answering exactly 

 to the sclerotic plates of the petrified specimens 



Fig. 159. — Sphenoftteriselegans (probably = /[etcrangiu}/i Grievii). Ribbed stem, bearing 

 several petioles. Note tbe transverse marks on tbe surface, where the inner cortex 

 is exposed, corresponding to the sclerotic bands of //. Grievii, as shown, for 

 example, in Fig. 154. 3 nat. size. After Star. 



(see Figs. 159 and 160, and compare with Fig. 154). 

 We may therefore, on the whole of the evidence, 

 take it as proved that the structural specimens 



