NOTES ON THE MINERALS OF JAPAN. 265 



Ogasawarajima in the Journal of the Science College of the 

 Imperial University of Tokyo, 1889. The mineral is found in a 

 glass, in the shape of crystal skeletons and crystals, together with 

 a similar-coloured monoclinic pyroxene in ooPcö. coP. oP. P. 

 The length of the green bronzite is 0.5 to 1 cm.; it forms a paral- 

 lel growth with the monoclinic pyroxene and has the crystal faces 

 CO Poo, CO Poo, CO p, Pj and 2P2. An analysis by Shimizu is 

 mentioned in Kikuchi's work. 



108. Augite. 



NiSHiNOTAKE in Hizen. — Ishii has described porphyritic in- 

 dividuals of a dark-green augite and a brown olivine found in 

 the basalt and its agglomerate exposed at tliis locality. The augite 

 crystals measure about 0.1 cm. to 2 cm. along the vertical axis 

 and show usually the faces go Pô), coP co, oP, go p aiid P and 

 sometimes 2P and 2Pcb besides. 



The crystalline habit is generally thick columnar, but we find 

 also tabular forms with prev^ailing oP. Twinning on go p cö 

 is quite frequent, and often repeated in the same individual. 

 Pleochroism is weak, glass and other interpositions are nu- 

 merous. 



AzuNA near Yatsugatake in Kai, Tateshina, &c. in Shinano, 

 Onnadani near Yoneyama in Echigo, and Myögi in Közuke. — 

 The black augites from all these localities are similar in 

 characters, and distinguished from other specimens by showing 

 an apparently simple, rhombic-hemimorphic habit of penet- 

 ration-twins on coPcö. Specimens from Azuna have been 

 described by Ishiwara, those of Onnadani by Iwasaki, and 

 and those of Tateshina, Myögi &c. were studied by Takimoto. 



