190 



THE GEOLOGICAL HISTORY OF PLANTS. 



able beds of coal, probably of this age, also exist in China, 

 India, and South Africa ; and jet, which is so extensively 

 used for ornament, is principally derived from the car- 

 bonised remains of the old Mesozoic pines. 



In the next chapter we have to study a revolution in 

 vegetable life most striking and unique, in the advent of 

 the forest-trees of strictly modern types. 



NOTE TO CHAPTER V. 



I APPEND to this chapter a table showing the plant-bearing series 

 of the Cretaceous and Laramie of North America, from a paper in 

 " Trans. R. S. C.," 1885, which see for further details : 



(!N DESCENDING ORDER.) 



