JURASSIC PLANTS FROM KAGA, H[DA, AND ECHIZEN. 



3 



the Mesozoic flora nothing farther has been done 8 ') since the publica- 

 tion of the work by Dr. Gey] er. 



Since Dr. Rein's discovery of Jurassic plants, the valley of the 

 Tetori°"awa has been twice visited by geologists. The first visit, a 

 very short one, was made in 1880 by Dr. B. Kotö. On his return 

 he made a brief report 9 ) accompanied by a sketch map of the river 

 valley and four geological sections. The second and more extensive 

 visit was undertaken my friend Mr. Tadatsugu Kochibe. 



In 1883 the Imperial Geological Survey undertook the recon- 

 noissance of various parts of Central Japan, one of which was a 

 region including the provinces of Kaga, Hida, Echizen and Etchü, 

 between the parallels of 35° and 37° K. Lat. The survey was con- 

 ducted by my friends, Mr. T. Kochibe as geologist and Mr. K. Ködari 

 as topographer. This survey which lasted three months brought 

 back many interesting fossils, some of which together with those 

 formerly collected by Dr. Kotö, form the subject of the present 

 paper. 



As a detailed account of this survey will appear in future reports 

 of the Geological Survey, I need not dwell on this point more than 

 to indicate briefly the general outline of the geographical and geologi- 

 cal features of this part of Japan. This is done from data kindly 

 furnished to me by Mr. Kochibe. 



First, as to the geography. A mountain chain beginning with 

 Ishidogiyama in Noto runs nearly due south, with the provinces of 

 Kao-a and Echizen on one side, and those of Etchü and Hida on the 

 other. This culminates in llakusan, a group of volcanoes which rise 

 on the boundaries between Kaga, Hida and Echizen. There are three 



8') A. Schenk, in Richthofm's China vol. IV (p. 263, pi. LIV. fig. 1) 1883, described ami 

 figured a single specimen of Thyrsopteris elongata Geyl. from an unknown locality in Japan. 



9) B. Kotö :— Ishikawa-ken ka Kaga no Kurd Teiorigawa Klnbd Ohishitsu Gaisoku- Published 

 by the Imperial Geological Survey of Japan, 1880, Tokio. 



