Vokano O^hima, Tdzn. J 



pait of fclie island in contrast to tlie regular slope of the western 

 part, and tried to explain this by supposing the existence of older 

 volcanic bodies to the east of the present Oshima. On this as- 

 sumption, he divided the whole volcanic history into two stages: 

 the first stage being represented by the hypothetical volcanoes 

 which he considered to have been mostly submerged in water, so 

 that only high parts of the crater wall were above the sea level 

 as in the island of Santorin ; the second stage being represented 

 by the present volcanic body which consists of a somma and a 

 central cone. 



The harbour of Habu'- [oe), according to him, was one of 

 the craters in the first stage, the hills standing to the north of 

 Habu being the remains of the older volcanic bodies. 



He moreover recognized the tectonic line running through the 

 island in the direction N.N.W. — S.S.E., along which the central 

 crater and a number of parasitic cones are hnearly arranged. 



A brief description of the rocks was also given. 



It is an interesting fact that some remains of the prehistoric 

 stone age were discovered in 1901, under a lava flow (PI. VI. 

 BC 3) imbedded in a rugged cliff of Tatsunokuchi'^ (Id) not far 

 from the village of Nomashi'^^ (Ic). Yônosuke Otsuki^^ and Eyôzô 

 ToEif-" were sent at the time to examine these and to report on 

 what they saw there. _ 



Next year (1902), Denzô Sato and Nobuyo FuKUcnf^ visited 



I) rÉL^' 2} t|/ p 3) E^it 



4) " Human Remains under a Lava of Oshima in the Province of Idzu," Jour. Geol. Soc 

 Tokyo, Vol. VIIL, No. 99, 1901 (in Japanese). 



5) " Remains of the Stone (Age under a Lava of Oshima in the Province of Idzu," Jour 

 Geogr. Tokyo, Vol. XIV., Nos. 159 & 160, 1902 (in Japaness) ; Joiir. Anthropol. Soc. Tokyo, Vol 

 XVII., p. 320, 1902 (in Japanese). 



6) " Geobgùal Notes on Oshima, Idzu," Jour. Geocjr. Tokyo, Vol. XIV., Nos. 161 & 162, 1902 

 (in Japanese). 



