898 Transactions.—G eology. 
4:5; sp. gr. 2:592. Is completely decomposed by hydrochloric acid. In blow- 
pipe flame infusible, turns faint buff colour, no distinct soda reaction, but 
sd reaction of manganese with the proper fluxes." 
ANALYSIS. 
2, 8 
Silica.. re. i e .. 40:20 41:20 45:91 
Protoxide of iron .. d ae 12-10 1:67 
Alumina... es traces traces 5°63 
Manganese .. s T 3. » 5 traces 
Chromium .. mn oe oe , ” 
x ea vs s 33-20 34:02 35:07 
Water of constitution vs v. 190 1244 . 12:67 
8-20 100-06 
This is alluded to by Prof. Liversidge (Trans. N.Z. Inst., vol. x., p. 497) 
as marmolite. E 
There is also a specimen in the collection of the Colonial Museum, from 
Jackson's Bay, which is of a grass-green colour, translucent and laminated. 
Antigorite.—' The occurrence of this mineral at the Dun Mountain is 
mentioned by the late Mr. E. H. Davis (Geol. Rep., 1870-71, p. 112). 
Hectorite oceurs at the Dun Mountain, Nelson (for description see below, 
Art. xlviii.). 
Picrolite, a coarsely fibrous variety, of dark dirty green colour, occurs at 
the Dun Mountain. 
Chrysotile occurs as thin veins of a silky texture and pale green colour 
traversing the dark green serpentine of the Dun Mountain. 
Picrosmine, 2 Mg Si + H.—A massive sectile variety of this mineral, of 
a greenish-grey colour, occurs associated with chromite at the Dun Moun- 
tain ; it is also found as a network of veins, in which crystals of bronzite 
occur, in the sume district. 
Schiller Spar, Mg (Fe, Ca), Si (M, Cs DA + H.— The occurrence of 
this mineral with pyrites on the West Coast is mentioned by Dr. Hector 
(Jurors’ Rep. N.Z. Ex., 1865, p. 266). 
Chlorite, 9 À Si + K? A} + 8 H, occurs as a constituent of the ehlorite 
schists, which are found in many localities between Otago and Nelson on 
the West Coast side of the South Island. It is mentioned by Dr. Hector 
(Jurors' Rep. N.Z. Ex., 1865, pp. 266, 497) in the schist of the West Coast, 
and also as an amorphous form in the vesicular basalts of Otago Heads and 
elsewhere; by Dr. v. Haast in lamine in the metamorphic schists of 
the West Coast, (Jurors' Rep. N.Z. Ex., 1865, p. 257); by Mr. Skey, at 
Tararu Creek, Thames (Geol. Rep., 1870-71, p. 88); by myself in chlorite 
schists at the Fox Glacier, Westland (Geol. Rep., 1874-76, p. 78); and by 
Professor Liversidge, from ed Creek, — Lake (Trans. N.Z. Inst., 
vol. x., p. 497). 
