PROF. OMORI has recently published a second valuable memoir on the eruption of Sakura-jima, which occurred on January 12, 1914.1 The volcano lies in Kagoshima Bay, in South Japan, a few miles to the east of the city of Kagoshima. Until the last eruption Sakura-jima was an island. It is now connected by a lava-stream with the east side of the bay. The part of the bay lying to the north of Sakura-jima ranges in depth from 70 to 107 fathoms, and is apparently of the same origin as the deep lakes which are found behind the sea-coast volcanoes of Usu-san and Tarumai-san.