Plate II. 

 Map of the Riukin Curve. 



Scale 1 : 3.000.000. 



Geological Map of the Okinawa Group (excluding the Kerama and Iheya 

 Subgroups, Kume-jiraa, Tonaki-jinia, Aguni-jima, and Tori-shima ) 



Scale 1 : 200.000. 



