236 K. JIM BO : 



Supplementary twins of Rs are found in the mines of Ani, 

 and FuROKURA near Osaruzawa; in both of these localities Hz is 

 also found as simple individuals. 



Some crystals from the Handa mines in Iwashiro are, ac- 

 cording to Sakurai, in the form of R2 (instead of Us) with 

 peculiarly rounded crystal edges. 



Scalenohedral calcite with numerous faces was brought by 

 Saitö, from the zeolite locality of Osawa near Nikkö. 



Prismatic sub-individuals are found upon calcite crystals with 

 -iR. CO R from the zeolite locality of Maze. In the Kosaka 

 mines in Rikuchü, the crystals in -2R are covered by sub- 

 individuals in -2R. -2R. A reddish-white sharp-pointed rhom- 

 bohedron of calcite from Chikugo Province (in the University 

 collection in Tokyo) is covered with prismatic sub-individuals in 

 00 R. -iR. 



Peculiar brownish-grey pseudomorphs of calcite found in the 

 tertiary shale of Aoki in Shinano Province, are of special in- 

 terest. The shale is well stratified, and in it w^e have found 

 remains of vertebrae, a skull (about 18 cm. long) and other bones 

 of an animal belonging to Delphinidœ (?), which are all deformed 

 by pressure. The pseudomorphs vary in length from 3 to 13 cm., 

 and their forms are of at least four different types. Hiki has 

 refered two of these to Gay-Lüssite. As chief characteristics of 

 these pseudomorphs, we may mention rough transverse striations 

 like those of oscillatory combinations, the arrangement of indivi- 

 duals parallel to the stratification of the shale with their imper- 

 fectly developed edges below, and their frequent grouping in 

 an irregularly branched finger-like figure. Acute pyramidal forms 

 resembling a monoclinic form are most numerous ; flattened py- 

 ramids with sharp polar edges, very short pyramids with nearly 



