Area, including nearly the entire width of the impression, about 

 5 cm above that shown in plate 4. The impressions of the leaf 

 cushion rows are becoming more regular and distinctly longi- 

 tudinal, while the number of rows is increased by the introduc- 

 tion of new ones. The individual cushions are less compactly 

 alined in each row near the upper end of the area here shown. 

 This is the region of rapid contraction above the enlarged base 

 of the tree. [See pi. 2, 3] 



