ORDERS OF FOSSIL PLANTS. 



23 



MONOCOTYLEDONES. 



Petaloidese 

 Glumiferse 



ACOTYLEDONES. 



ThallogensB 



Acrogense 



Doubtful 



437 



2121 



These plants are arranged in the different strata as follows : — 



Fossil Species . 2421 



During the twenty years that have elapsed since this enu- 

 meration was made, the number of fossil species has been 

 very greatly increased. The proportion exhibited in this 

 table is likewise greatly altered from the enormous additions 

 made to the Tertiary Flora by linger, Ettingshausen, and 

 Heer, and from the important contributions by Principal 

 Dawson to the Deyonian Flora. 



Among the fossil Thalamifloral Dicotyledons, Unger men- 

 tions species belonging to the orders — 



Magnoliacece. 



Anonacese. 



Nympliseaceae. 



Capparidacese. 



MalvacejB. 



Byttneriacece. 



Tiliacese. 



Aurautiaceae. 



Malpigliiaceae, 



Aceracese. 



Sapindacese. 



Cedrelacese. 



Zygopliyllacese. 



Xanthoxylaceae. 



Coriariacea3. 



