ON ITS EXTERIOR. VOLCANOES. 361 



Roche Poncie in 1848. As it is also called Iwosima, 

 care must be taken not to confound it with the more 

 northern island of the same name in the Strait of Van 

 Diemen. It has been extremely well described by 

 Captain Basil Hall. Between 26 and 27 of latitude 

 follow the Loo Choo islands, of which Klaproth had 

 given a special map so early as 1824 ; and more to the 

 south-west the little archipelago of Madschikosima which 

 approaches near to the great island of Formosa, and is 

 regarded by me as the termination of the East Asiatic 

 islands. In lat. 24 near the east coast of Formosa, in 

 October 1853, Lieutenant Boyle observed a great vol- 

 canic eruption in the sea. (Commodore Perry, Exped. to 

 Japan, vol. i. p. 500.) In the Bonin islands (Buna-sima 

 of the Japanese, lat. 26|to 27fN., 142 17' E.), Peel's 

 island has several craters with sulphur and scoriae, which 

 appear not to have been long extinct. (Perry, vol. i. 

 p. 200 and 209.) 



6. South Asiatic Islands. 



We comprise under this head Formosa (Thaywan), the 

 Philippines, the Sunda Isles, and the Moluccas. The 

 volcanoes of Formosa were first made known to us by 

 Klaproth from Chinese sources, which always give such 

 circumstantial descriptions of natural phsenomena. ( 489 ) 

 They are four in number, one of which, Tschykang, Red 

 Mountain, has a crater lake of hot water, and has had 

 great igneous eruptions. The small Baschi islands, and 

 the Babuyans which so late as 1831, according to Mayen, 

 had a vehement fiery eruption, connect Formosa with 

 the Philippines, the smallest and most broken of which 



