80 



B. KOTO 



o 



u 



CM 

 • r-l 



o 



ce 



Q) 

 U 

 Pa 



8 



9 



Pi 



o 

 u 



be 



o 



O 





m 



Ol 



bx) 

 o 



Ol 



5 Red, and white, platy qnartzite. 



6 Adinole-slate overlying the preceding. 



7 The lower schalstein, intercalated with the adinole-«late, 

 and also the limestone with crinoidal stems and corals. 

 Graywacke-sandstone and slate, intercalated in their loAver 

 horizon with the adinole slate. 



Siliceous slate or common hornstone overlaid by another 

 series of the adinole-slate. 



The upper schalstein and the siliceous Iladlolarian slate. 

 Diabase- sheet sometimes occurs in this horizon. 

 The FusuUna-\m\e,^ione.j etc. 



The Jurassic subgroup composed of the medium -grained, 

 grayish sandstones and shales. 



(«) Ihe above-mentioned sandstones afford rich remains 

 of Cijrena, Mdania, Mijacitcs ; while (6) in shales we have 

 found the remains of plants, viz., TJnjrsoptcris, Nilsonicif 

 Dichsoiiia, Podozavtitcs, rccoptcris and Zamitcs. 

 14 The Cretaceous subgroup consists of thick sandstones and 

 shales with Tri<joniœ belonging to the section Scahrce, 

 Peteroperna, Ostrea ( Alectryonia), Patella, Exogijra, an 

 e volute form of Ammonites, Inoceramus, Alaria, Ecliino- 

 spatangus, Area, Ciicullaea, Sohn, Anisocardia, Nucida, 

 Pholadomija, Montlivaidtia and Lucina. 

 Lastly, the Tertiary basin of Chichibu, being made up of 

 hard sandstones with marly layers, has furnished many 

 fossils, the descriptions of which have lately been given 

 by Dr. D. Brauns in his valuable contribution to the 

 geology of Japan, entitled : 'Geology of the Environs of 

 Tokio.' Mr. Otsuka made an addition of other forms to 

 the list of Brauns, viz., Area, Turritella, Voluta, Nucula, 

 \ and an Eehinoid. 



/15 



