26 K. HONDA, T. TERADA, Y. YOSHIDA, AND D. ISITANI. 



This bay lies in the south of the bay of Kojiroliama and 

 not far from it. Stations were Yoshihama, Konpaku, Senzai 

 and Kokabe. The secondary undulation was generally irregular 

 and inconspicuous ; but on Aug. 2-3, there appeared an unusual 

 undulation of regular type of the period 18.5"-19.6'". Probably 

 this undulation was connected with the low pressure then pre- 

 vailing over the Pacific to the south of Tosa. It was also found 

 that the undulation was very faint at Senzai and Kokabe near 

 the mouth, and conspicuous at Yoshihama and Konpaku at and 

 near the end of the bay respectively, and that the phases of the 

 principal undulation were the same for these stations. The 

 periods observed are 15.4"\ 16.5'"-17.9"\ 18.5™-20.r, 22.2™- 

 23.r\ and 32.0'"-37.2'". The calculated period is 21.1'" in good 

 coincidence with the period of the conspicuous undulation. 



(6) Okirai (Aug. 4-7, 1904). Top. 22. 



Stations were chosen at Okirai and Koisliihama. The bay 

 of Okirai had a rather narrow mouth. Tlie observed periods are 

 10.0™, 27.5'"-29.9™, and 54.5'", while the calculated period is 26.4™. 



(7) Ryôri (Aug. 8-9, 1904). Top. 23. 



The bay of Ryori lias a form similar to tlie bay of Yosliiliama, 

 but its dimension is much smaller ; the station was chosen at 

 Nonomae. 



The undulation was not conspicuous ; but the periods 12.9"', 

 18.3'", 29.0"^ and 33.3'" may be traced. The undulations ob- 

 served by us were not conspicuous, though one of the periods 

 lies fairly near the calculated period of free oscillation 18.4'". 



(8) Ofunato (Aug. 8-10, 1904). Top. 24. PL X, Fig. 1-4. 

 The bay of Ofunato lias an elongated form and is some- 



A 



what crooked near its mouth, so that at Ofunato situated at 

 the end of the bay, the sea is extremely calm. It has a form 



