12 AKT. 5- — H. YABE : 



It is not my intention in this i)lace to enter into a detailed 

 description of the stratigraphy of our upper Palaeozoic strata and 

 faunal contents ; a very condensed account of them is found in 

 late lh\ T. Harada's work ' Japanischen Inseln', and ' The 

 Outlines of the Geology of Jai:)an ' issued by our Imperial Geo- 

 logical Survey. Some authors are accustomed to regard our 

 /«Mi/ma-limestones as belonging to one and the same horizon, 

 but such an assumption is at present without foundation in fact 

 and can oidy be settled l)y a careful investigation, both strati- 

 graphical ami paUeontological, of the limestones in question. 



The only well known I\isi(lina-\\mesioneä of Japan are those 

 of Kinshö-zan behind the small town of Akasaka, near the city 

 of Ogaki in the province of Mino. In this locality Richthofen 

 got his fossils which Schwager afterward studied. Geological 

 studies of the district were subsequently undertaken by Professors 

 GoTTSCHE,^' KöTö"^ and Wakimtzu.'""^ All these investigators agree 

 in accepting two grand divisions of the limestone deposits, which 

 have been designated, (as in the Garnie Alps, and Russia), as the 

 Fusulina-nnd the Schicageo^ina-limestone series respectively. Both 

 series are again subdivided into a number of zones in which, 

 however, they do not quite agree. I examined more than a 

 hundred microscopic sections of the limestones brought from all of 

 these zones, mostly by Mr. Wakimizu, and came to the con- 

 clusion that the distribution of Fusulina among them quite 

 justifies the two grand divisions of the strata. The distribution of 

 the Foraminifera in the respective divisions is as follows :^^ — 



1) C. Uottsciik: Ueber J apanisclic Carbon. Zeit. il. deiitsch. geol. Gesell. Bd. XXXVl. 1881. 



'J) ß. KöTö: Ciassi ficJilion of the Carboniferous Liiuestones of Akasaka (in Japanese). 

 Juurn. Geol. See. Tükyö. Vol. V. 1898. 



3)T.Wakimizü: Limestone Beds ofKinshü-zan, Akasaka (in Japanese). Ditto. Vol. IX. 100. 



4) Yabe: a Trip to Kins!iô->:an (in Japanese). Ditto. Vol. XI. 1904. The Second 

 Trip, (in Japanese). Ditto. Vol. XIV. 1906. 



