Cox.—On the Mineralogy of New Zealand. 395 
occurs as veins traversing serpentine and hornblende schist, one variety 
being speckled with chromic iron. It is found as boulders, sometimes of 
great size, in the auriferous wash of a few localities on the West Coast, such 
as the Kumara diggings, on the banks of the Teremakau River, and the 
Greenstone diggings near Lake Brunner. Two analyses of this mineral, 
quoted by Dr. Hector (Jurors’ Rep. N.Z. Ex., 1865, p. 418) give the follow- 
ing composition : — 
Silica is » s Hager UB 56°00 
Protoxide of iron, with traces " 
; 12:43 
manganese and chromium | 11:18 
Alumina .. ee 25 a 1:42 
ime id ee s es 9:00 9:94 
Magnesia .. s T 4 9185 21:96 
Soda d. |a ké .. traces traces 
Water of constitution  .. oe 97 97 
96°25 100-00 
Diallage, (Ca, Mg, Fe) Si.—The first mention of this mineral in New 
Zealand is by Dr. Hector (Jurors Rep. N.Z. Ex., 1865, pp. 266, 488) as 
occurring in diorites on the West Coast, and during his trip round the West 
Coast Sounds in 1868, he-collected specimens in gabbro from Hokuri Creek, 
Martin's Bay, Lake MeKerrow, and the head of Kakapo Lake; he again 
mentions it (Trans. N.Z. Inst., vol. ii., p. 877) as dykes in the Dun Moun- 
tain. It is mentioned by Dr. v. Haast as occurring in gabbro in the Mt. 
Torlesse Range and Upper Rakaia (Jurors’ Rep. N.Z. Ex., 1865, p. 257) ; 
by Mr. J. C. Crawford in reefs traversing mesozoic limestones at Waike- 
kino (Trans. N.Z. Inst., vol. ii., p. 851); by Mr. E. H. Davis, at the Dun 
Mountain (Geol. Rep., 1870-71, p. 112); and again by Prof. Liversidge in 
his description of the minerals in the Otago Museum (Trans. N.Z. Inst., 
vol. x., p. 496), from Lake McKerrow and Dun Mountain. There is a 
specimen in the collection of the Colonial Museum, from Kakapo Lake, ‘of a 
dark-green colour and metallic lustre, which is not well marked, corre- 
sponding with the specimen described by Prof, Liversidge from Lake 
McKerrow. 
Hypersthene, (Mg, Fe) Si.—This mineral is mentioned by Dr. Hector in 
diorite rocks on the West Coast (Jurors’ Rep. N.Z. Ex., 1865, pp. 266, 438), 
and was collected by him from Warp Point, Kaduku River, in 1863. It is 
again mentioned by Dr. v. Haast in hypersthenite, Malvern Hills (Jurors’ . 
Rep. N.Z. Ex., 1865, p. 257); by Mr. E. H. Davis at the Dun Mountain 
(Geol. Rep., 1870-71, p. 112) ; and by Prof. Liversidge as occurring in the 
collection of the Otago Museum from Warp Point, Kaduku River (Trans. 
N.Z. Inst., vol. x., p. 497). * 
