Cox.—On the Mineralogy of New Zealand. 398 
Augite, È Si = (Ca, Mg, Fe) Si.—This mineral enters into the composi- 
tion of all our basalts, dolerites, anamesites, trachydolerites, diabases, and 
melaphyres. Isolated crystals are rare, but there is a specimen in the 
collection of the Colonial Museum, of porphyritic diabase from Nelson, in 
which dark-green monoclinic crystals of augite are well developed, some of 
them being half an inch long. No macles are seen in this specimen. 
It is mentioned by Dr. Hector in the basalts around Dunedin (Jurors’ 
Rep. N.Z. Ex., 1865, pp. 266, 488), in basalt from the Snares, and in 
dolerite from Antipodes Island (Trans. N.Z. Inst., vol. ii., p. 179), and in 
the dolerites and basalts of the Auckland Islands (Trans. N.Z. Inst., vol. ii., 
p. 183); by Dr. v. Haast in trachydolerites and as fine twin crystals im- 
bedded in agglomeratic tufa, Banks Peninsula (Jurors’ Rep. N.Z. Ex., 
1865, p. 257), in concretions in basaltic rocks of Chatham Islands (Trans. 
N.Z. Inst., vol. i., p. 180), and in basalts of Banks Peninsula (Trans. 
N.Z. Inst., vol. xi., p. 499); and by R. Daintree, Esq., F.G.S., in dolerite 
from the Selwyn River, Snowy Peak Range, Hororata District, Flagstaff 
Hill basin and Acheron section. 
Asbestos.—The occurrence of this mineral at Milford Sound is men- 
tioned by Dr. Hector (Jurors Rep. N.Z. Ex., 1865, p. 266), and the late 
Mr. E. H. Davis records it from Dun Mountain (Geol. Rep., 1870-71, 
p. 112). There are several specimens in the collection of the Colonial 
Museum, but none of them possess that flexibility and readiness to separate 
into fibres without which the mineral is of but little value. The best 
sample was collected from Collingwood by Dr. Hector; it is of a pale green 
colour and fibrous. It occurs associated with the mt there. 
Tachylite, Al Si?-4-8 (Fe, Ca, Mg, Mn, Na, K) Si.—The occurrence of 
this mineral on the sides of fissures in the volcanic rocks of Banks Penin- 
sula, where trachytic dykes have intruded, is mentioned by Dr. v. Haast 
(Trans. N.Z. Inst., vol. xi., p. 508). 
Hornblende, È Si.—Is of very common occurrence in New Zealand as 
a constituent of the syenites, trachytes and diorites which abound, and also 
in certain hornblendic schists and gneiss which are met with in the north- 
western part of the South Island, and again at the Bluff, Southland. It is 
mentioned by Dr. v. Hochstetter (New Zealand, 1868, Eng. ed., p. 471) as 
a blackish-green hornblende in the syenite of the boulder-bank, Nelson; 
by Dr. Hector as veins in syenitic and older trap-rocks in Milford Sound 
(Jurors' Rep. N.Z. Ex., 1865, pp. 267, 488), in the trachyte of the Sugar 
Loaves, Taranaki (Geol. Rep., 1866-67, p. 8), as a hornblende rock in the 
Auckland Islands and Ruapuke (Trans. N. Z. Inst., vol. ii., pp. 188, 185), 
and in diorite on Great Barrier Island (Trans. N.Z. Inst., vol. ii., p. 875) ; 
by Dr. v. Haast, in basaltic and doleritic rocks at Banks Peninsula, Malvern 
