STATISTICS OF METASPERMAE. 641 
recollected, the reverse was the case. In the northern extra- 
tropical generic element the parallelism is resumed as appears 
in the next table. 
8. Northern Extratropical Generic Element. 
Per cent. of all/Northern Ex- 
Northern Ex-|tratropical per 
tratropical. cent. of each. 
Monocotyledones........... 28 20.9 26.6 
Archichlamydeae............ 67 50.0 38.2 
Metachlamydeae ............ 39 29.1 30.4 
Total North’n Extratropical] 184 |... .. eee eee eee cele e eee eee ee cee 
Northern Extratropical per 
cent. of all genera. ........ Bord ilies teareeeoley weaunel| Saaguseas eee @ereunes 
In the above the Archichlamydez appear once more as 
distinctly extratropical, both numerically and by percentage. 
The next tables indicate in a most convincing manner the 
juniority of the Metachlamydez. Both of these tables are in 
line with the tabulations of families which precede and those 
of species which are to follow. 
9. Western Hemisphere Generic Element. 
Per cent. of all Western 
Western Hemisphere 
Hemisphere. |percent. of each. 
Monocotyledones..... ......- 9 28.1 85 
Archichlamydeae........... zi 21.9 4.0 
Metachlamydeae..........- 16 50.0 12.5 
Total Western Hemisphere] 32 |... .... cee eee elec cece cece eee 
Western Hemisphere per ct.. 
of all genera............-- LO |seekoyes veaewesion [peices eeam nas 
From the above the weak position of the Archichlamydez 
and the strong position of the Metachlamydee as furnishing 
sub-endemic genera is very apparent. Of the total group of 
—41 
