158 OEIGINAL ARTICLES. 



Tert. Helvetia?" for the fossil species. Tlie total number of genera 

 common to Japan and tlie Tertiary is 77, as enumerated, p 175. 

 Nearly the same number, it has been observed, is common to Tertiary 

 and Eecent Europe. But the 77 common to Japan include 26 not 

 in Eecent Europe, and amongst these are several eminently charac- 

 teristic tertiary types. 



The Phanerogamia of Japan are approximately — 



Nat. Orders. Genera. 

 Dicots. . . 132 543 



Monocots. .17 126 



149 669 



Indigenous species hitherto published about 1550. Tlie 10 largest 

 Nat. Orders are — * 



Of the characteristic groups of the Swiss Tertiary, in addition to 

 those marked X iii the above, we have in Japan — 



t The sequence of Orders given by M, De Candolle (Geog. Bot. 1207) appears 

 to have been founded upon imperfect material. It is after Zuccariui. 



