NOTES ON THE MINERALS OF JAPAN. 230 



sions. These dodecahedra resemble f-^V^J of the reguhir sys- 

 tem and have rounded edges and slightly depressed faces. How 

 such a remarkable form was produced is still a question. 



The structure of each ball is concentric and radial-fibrous, 

 with a nucleus of some decomposed rock-fragment. The size 

 varies from that of very minute sand-grain uj) to that of a 

 hen's eg^g (about 4 cm. in length). 



MuTsuKEJiMA near Nagasaki. — Ko has mentioned the 

 occurrence of white and grey-yellow hemispherical aggregates of 

 aragonite on a dark rock of this island. 



The same author has also described the same mineral as 

 being found in the Ichinokawa mines in lyo. 



58. Witherite. 



Ko has mentioned radial aggregates of white-coloured 

 witherite in metallic veins at Tsubaki in Ugo, where crystals are 

 also found with o^ P, 2P^, uP and P. 



57. Cerussite. 



Ko has described stellar trillings of this mineral from the 

 mines of Kamioka and Kosaka (in Eikuchü). In the former 

 locality P, c/=P, Pœ and œPoo were observed. Saito has 

 brought from Kosaka, trillings showing a combination of P. 

 CO P GO. CO P, P Û0 ; and from Arakawa in Ugo, small pyramidal 

 crystals of white cerussite. They are about 1.5 cm. in length 

 and apparently in the form of hexagonal pyramids, which are 

 all trillings with faces P and go P oo. Besides, columnar ag- 

 gregates of the same mineral occur in this locality. 



58. Malachite. 



In the mines of Ani and Aeakawa, there occur, besides 



