Is^OTES ON THE MINERALS OF JAPAN. 267 



decomposed parts of the mother rock, as is the case with the 

 black augite of Azuna and other localities. 



109. Wollastonite. 



IsHiYAMA and GoBESSHo in Omi, Inariyama in Yamashiro, 

 IsHiGUEE in Ise, Tokiwa in Shinano, a place near Kasama in 

 Hitachi and other places are localities of fine-fibrous to needle- 

 shaped aggregates of wollastonite in crystalline limestone. Some 

 of the specimens from the provinces of Omi and Mino have 

 been analyzed. The wollastonite of Ishiyama is found along the 

 stratification of limestone, those of Gobessho and Tokiwa some 

 times form zones parallel to those of red garnet, of green augite, 

 &c. 



110. Hedenbergite. 



At Oktjradani in Obira in Bungo Province, there is an 

 extensive aggregate of hedenbergite in biotite-hornfels. Here the 

 mineral is found in large crystals, sometimes 18 cm. in length, 

 or in radial-columnar as well as granular aggregates. The large 

 individuals are cemented together by fluorite. This hedenber- 

 gite rock contains numerous dark-green garnet crystals and is 

 traversed by veins, in which assenopyrite, pyrrhotite, copper 

 pyrite, &c., are found in massive state. The veins just men- 

 tioned were formerly worked for copper. In them dark-brown 

 or dark-violet axiuite crystals, as well as very good hedenbergite 

 specimens (with oP, coPcöj copoo, odP, Pcö^ 2P, aPœ, and-P) 

 are collected in this. The following is one of the analyses made 

 by the chemists of the Imperial Geological Survey : 



