n. Simotomai — Tarumai Dome in Japan. 95 



Fig. 7. 



Fig. 7. View from a point in the large trench on the top surface of the 

 dome. In the background, the somw a- wall is seen. The large fissure, trav- 

 ersing the inner crater- wall, was formed on May 15th, 1909. In front is seen 

 the steep cliff of the south wall of the trench. Photograph by the author, 

 October 20th, 1916. 



Fig. 8. 



Fig. 8, Slickened surface on the north wall of the large trench on the top 

 of the dome. Photograph by the author, October 20th, 1910. 



