NOTES ON THE MINERALS OF JAPAN. 215 



pointed pyramidal crystals of sulphur from a solfatara of Manza 

 on the western flank of the volcano. The individuals attain a 

 length of 1 .5 cm. along the c axis, show the faces, oP, P,^P, coP 

 and a brachydome, and carry terraced depressions on P, which 

 are due to imperfect development of crystals. Numerous minute 

 elliptic depressions on this face may be due to etching. 



In 1898, I found, at the same place, less numerous but 

 more perfect crystals showing a short- columnar habit. Their 

 size is smaller than one fourth of the above mentioned specimens ; 

 the faces are, however, more numerous. 



KoBui in Oshima Province. — On the western side of the 

 volcano Esan, a brownish-grey compact sulphur is found form- 

 ing thin layers in a grey tuff, in which we find, besides the 

 stratified specimen, quite irregular aggregates of ordinary yellow 

 sulphur (Jimbô's observation 1889). 



YoNAGO in Shinano Province gives orange-red tellurium- 

 sulphur, while Tateyama- JiGOKU in Etchü Province and the island 

 IwöjiMA near the province of Osumi are localities of selenium- 

 sulphur. 



The KosAKA mines in Rikuchü. — Small crystals of sulphur 

 with numerous faces are found in the metallic veins containing 

 copper, silver, &c. 



3. Arsenic. 



Akatani in Echizen. — As described by Beck in Tschermak's 

 Mittheilungen, 1897, and previously mentioned in the Zeitschrift 

 der deutschen Geologischen Gesellschaft, 1895, the native arsenic 

 of this place is found in the shape of globular as well as quite 

 irregular groups of numerous rhombohedral crystals showing 

 their poles outside. Their edges are usually rounded and their 

 surfaces roughened and tarnished. The centre of the aggregate 



