JOURNAL OP THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XVI, ARTICLE 1. 



Notes on the Raised Coral Reefs in the 

 Islands of the Riukiu Curve. 



By 

 S. YOSHIWARA, ' 



Science College, Imperial University, Tokyo. 



With 2 Plates. 



In the southern seas of Japan we meet with the reef corals of 

 both recent and more remote ages. They are not only found in 

 Formosa, our new territory, but also in the islands of the so-called 

 Riukiu Curve.* The following notes which treat of these coral reefs 

 are based upon observations made on my geological trip to those 

 islands during the nine months from July 1899 to March 1900. , 



I. DISTRIBUTION OF RAISED CORAL REEFS IN EACH ISLAND GROUP. : . 



The Riukiu Curve consists of many scattered groups of islands", 

 arrano:ed in a curve extendino^ over hundreds of miles béttvèeii 

 Formosa and Kyûshû. The southernmost is called the Saki-shima 



* The name was first proposed by Prof. B. Koto, Jouni. Geol. Soc. TôJcyô, Vol. V. No. 49 

 {1897). The word Rinkiu is transliterated " Loochoo " on foreign maps. 



