Cox. — On the Mineralogy of New Zealand. 405 



Daintree, Esq., F.G.S. (Trans-. N.Z. Inst., vol. vii., p. 458), and is again 

 alluded to by Prof. Liversidge, from Dusky Bay and Charleston. (Trans. 

 N.Z. Inst., vol. x., p. 497). 



Lepidolite. — The occurrence of this mineral is mentioned by Dr. Hector 

 in the gneiss of the West Coast and in the marble of Thompson Sound 

 (Jurors' Eep. N.Z. Ex., 1865, pp. 266, 437). 



Biotite, j^\ Si + (Mg, K, Fe) 3 Si, is mentioned by Dr. Hector (Jurors' 

 Rep. N.Z. Ex., 1865, pp. 266, 437) as occurring on the West Coast, and 

 there are specimens in the collection of the Colonial Museum from Milford 

 Sound and Doubtful Inlet. In the last locality it occurs as a black-green 

 mica rock with numerous minute crystals of zircon. 



Eubellane is mentioned by Dr. v. Haast as occurring in the volcanic 

 rocks of Banks Peninsula (Jurors' Rep. N.Z. Ex., 1865, p. 257). 



Lepidomelane, Qy. jp c ) Si + (Fe, K) Si. — This mineral is mentioned by 

 Dr. Hector (Jurors' Rep. N.Z. Ex., 1865, pp. 266, 437) in the schists and 

 gneiss of the West Coast, and there are specimens in the collection of the 

 Colonial Museum from Milford Sound, where it occurs in thin hexagonal 

 plates of a blackish-green colour, bronze by reflected light in certain posi- 

 tions ; streak, dirty green. Thin laminae slightly flexible, rather brittle. 

 Before the blowpipe becomes bronze-yellow, and does not fuse. 



Marg.arite, J4i 2 Si + (Ca, Na, Mg) Si + H, is mentioned by Dr. Hector 

 (Jurors' Rep. N.Z. Ex., 1865, pp. 266, 437) in the schists and gneiss of the 

 West Coast, and by Dr. v. Haast from the same localities (Jurors' Rap. 

 N.Z. Ex., 1865, p. 257). There is a small specimen in the collection of the 

 Colonial Museum from Milford Sound of a pearl-grey colour. 



Chrome Mica. — This mineral is a chrome-magnesian mica, occurring in 

 flat tabular plates of a green colour, and belongs to the hexagonal system. It 

 is talcose in appearance and feels soapy to the touch, but Mr. Skey's analysis 

 precludes its falling into the talc group, and it must therefore be considered 

 as a chrome-magnesian mica, the percentage of water in which is somewhat 

 high. A somewhat similar mineral from Schwartzenstein, analyzed by 

 Schafhautl, is mentioned in Dana's System of Mineralogy, but it contains 

 more silica and less alumina than this specimen. 



Silica 



Scllwartzensteiu. 

 47-68 



Dead-horse Gully. 

 39-25 



Alumina 



15-15 



2212 



Chromic oxide . . 



5-90 



1-56 



Ferric oxide 



5-72 



18-69 



Manganous oxide 

 Magnesic oxide . . 



1-05 

 11-58 



•41 

 10-60 



Sodic oxide 

 Potassic oxide . . 



1-17) 

 7.27 J 



113 



Water 



2-86 



406 



Lime 



— 



2-18 



98-38 100-00 



