Z M. YOKOYAMA. 



of Stockholm published a preliminary communication 5 ) on more than 

 70 species of Tertiary plants collected by Prof. Nordenskjold on his 

 visit to Japan during the famous Vega Expedition around the Asiatic 

 continent. This work was soon followed by a more complete one, 6 ) 

 in which leaves collected by Hilgendorf are also described. The 

 work principally treats of the young Pliocene, or, perhaps, the oldest 

 Quaternary flora of Mogi, a very important group, from which the 

 author was able to draw interesting conclusions as to the origin and 

 climatic relations of our recent flora. In this work he also men- 

 tions 7 ) 12 species of the older Tertiary plants from Ezo (Hokkaido) 

 and Honshu determined by Leo Lesquereux, but which were up to 

 that time yet unpublished. 



During the last two years our Geological Survey has sent to 

 Prof. Nathorst a large collection of Tertiary plants for investigation, 

 on a part of which he has already drawn up a brief preliminary 

 report. 8 ) These were exclusively from Northern and Central Japan. 

 For the most part they belonged to the older Tertiary, corresponding 

 in age to the floras of Sachalin and Alaska. Prof. Nathorst men- 

 tions in this paper plants collected by Mr. Petersen at Nagasaki. 

 About these, and the plants last sent chiefly including those of Shi- 

 koku and Kyüshü, he will write other memoirs. 



By the study of these fossils we shall be enabled to form quite a 

 comprehensive idea regarding the Tertiary flora of Japan ; but as to 



5) Dr. A. G. Nathorst : — Förvtskickadt meddelande cm Tertiärfioran vid Nangasaki pâ Japan. 

 Aftryck ur Geologiska Föreningens i Stockholm Förhandlingar, 1881, No. G8, vol. V, No. 12. 



0) Dr. A. G. Nathorst : — Bldrag till Japans Fossila Flora. Ur dvega expeditionens Vetens- 

 kapliga jakttagelserd. Stockholm 1882, vol. II, 105 pp. w. 16 pi. 8° — Also in a French transla- 

 tion : — Contribution à la flore fossile du Japon, 92 pp. w. 16 pi. 8° (Kougl. Svenska Velenskaps 

 Akademiens Handliuger, 1883, vol. 20, No. 2). 



7) Contribution à la flore fossile du Japon, p. 5. 



8) Dr. A. G. .Nathorst: — Beiträge No. 2 zur Tertiärflora Japans, Vorläufige Miltlieilung. 

 (Botan. Centrait»!, f. d. Gesammtgeb. d. 13 jtauik d. In-u. Auslaudes, vol. XIX, 1884. No. 29. 

 Cassel.) 



