62 Art. 8. — A. Kryshtofovich : 



distinct species. I have mentioned above, that the connection of 

 our Cretaceons fossils with the Arctic Tertiary is not at all sur- 

 prising. For instance, M. trlnervls Hr.,^^ having been previously- 

 observed together with Populus arctica and Hedera McClurii in the 

 so-called Tertiary of Atanekerdluk, was afterwards recognized by 

 Dawson in the Upper Cretaceous Bed of Port McNeil of Vancouver,^ 

 which corresponds to the Nanaimo Group and overlies the Beds of 

 Quatsino.^^ 



Dawson has also recorded M. crdacea of Patoot from the 

 Mill-Creek Series in the Cenomanian,*-* if his determination is correct. 

 We must also throw a glance upon the " Miocene " 31. tenera Hr. 

 from Spitzbergen,^^ similar with our specimens in size and form. 



There are in our collection still very many other dicotyledo- 

 nous leaves, which represent different species not above mentioned. 

 But not having the greater part of our collection at my disposal, 

 where these leaves are represented by far more perfect specimens, 

 I must postpone their determination. 



Geological Institute 



Imperial University 

 Jan. 22nd, 1918. Tokyo. 



1) Heeb (1868), p. 115, pi. XV, f . 7-13 ; (1869 c) p. 480, pi. L, f. 12 ; LII, f . 8 a. 



2) Dawson (1893), p. 64, pi. X, f. 38. 



3) Id. (1890), p. 180. 



4) Dawson (1889), p. 13, pi. IV, f. 3. 



5) Heer (1876 a), p. 83, pi. XXI, f. 6. 



