NOTES ON THE MINERALS OF JAPAN. 237 



rounded outlines produced by numerous striations, and prismatic 

 forms with blunt terminations are less frequently found. The 

 number of these pseudomorphs enclosed in the shale is very great ; 

 ten or twenty samples of them are easily collected in a few 

 minutes. 



Similar sjDecimens occur in marly nodules in the tertiary 

 shale of the Pokonai and other coal-fields in Hokkaido ; also 

 in another state at Okozu in Echigo Province. 



Beautiful limestone-caves with stalactites are found at Kiura 

 in Bungo, Kagemori in Musashi, &c. 



50. Dolomite. 



Crystals of dolomite occur rarely in the Aikawa mines ; 

 dolomite-nodules and beds are found in the tufaceous shale of 

 Nakayamatöge near Aikawa. Bhombohedral crystals of the 

 mineral, white to yellowish-grey in colour, are found iti the 

 Ani and Innai mines. 



51. Magnesite. 



At Yoshinomura in Tosa, magnesite cr^^stals of brown colour 

 were found imbedded in a white talc-like mass. 



52. Smithsonite. 



In the HosoKURA mines in E-ikuzen Province, there is 

 found massive smithsonite derived from zinc-blende and form- 

 ing botryoidal aggregates. Drusy crystals are sometimes found on 

 these aggregates. In the Kuratani mines grey-coloured sphe- 

 rical as well as botryoidal aggregates of smithsonite are found, 

 with attached and enclosed individuals of pyrite and zinc- blende. 

 A pseudomorph of smithsonite after calcite (-^R. co R) was 

 brought from the Kamioka mines in Hida, where massive smith- 

 sonite is found in other forms together with calamine. 



