1. 1) T. Matuzawa, K. Hasegawa and S. Haeno, Bull. Earthq. Res. Inst., 4 (1928), 85.
2. 3) The latter alternative appears more plausible for explaining the depression of the bed of Sagami Bay; these Proceeding, 4 (1928), 45.
3. 1) The authors' view on the mechanism of formation of Japanese Arc is propounded in the papers published in Bull. Earthq. Res. Inst., 3 (1927), 67 and also 4 (1928), 21.