92 B. KOTÖ. 



matter. Only a few quantities of felspar, and a yellowish-green, 

 highly pleochroic epidcte, are sporadically discernible. 



(a.) A typical rock of the appearance of a compact chlorite- 

 schist is found in Nakakubo, in Kanra Göri,* Közuke. 



Here the pyroxene presents many characteristic features quite 

 distinct from those already mentioned. The most striking aspect 

 of the pyroxene is its light yellowish-brown colour, very common in 

 augites of Basalts, but less so in andésites and trachytes. It is, as 

 usual, traversed by various transversal cracks, from which the process 

 of 'glaucophanization' has been commenced as well as from peripheries. 

 The paramorphosed glaucophane is compact so as to lead observers to 

 think that there is an intergrowth with a pyroxene. In other respects 

 it presents nothing very special, except its intensely blue colour. The 

 glaucophane, in turn, passes into a somewhat finely striated, deep 

 green substance, and its transformation is very gradual ; the only 

 difference between them is in the colour of both minerals, (Fig. III.) 

 The above-mentioned, deep yellowish-green mineral might be classed 

 near arfvedsonite, judging by its external habitus and colour after 

 comparing it with a specimen from a locality unknoAvn to me, in 

 Greenland. This, as well as the glaucophane, resolves into a con- 

 fused aggregate of a yellowish, fibrous mass and the latter may fitly 

 be called crocidolite. 



(h.) On the southern side of the Tsuyetate pass, in the village 

 of Kitagawa, Tosa province, there occurs an ash-grey, earthy slate 

 which under a simple macroscopical consideration, gives scarcely any 

 indication as to nature of the mineral contained in it. 



Under the microscope thin slides show nothing more than glau- 

 cophane, and its derivatives of an extremely fine fibrous structure, 

 together with some remnants of the original diallage. We may follow, 



* Köri or Gôii is nearly syuonymous with a township or 'Kreis ' in Germany. 



