Cox.—On the Mineralogy of New Zealand. 427 
examination has been to show that in the Bismuth ore from the granite 
district of Beaver County, Utah, this mineral is largely represented, and 
moreover, in a rock which very closely resembles the one from Collingwood. 
Mr. Skey has tested this rock for Bismuth, but has not been able to 
detect the presence of this valuable metal; as, however, only two small 
specimens were forwarded, and these were taken from the outcrop, it by no 
means proves that a similar association may not occur here, and a careful 
examination of the rock in question may lead to valuable results. 
Meratuic Mryerats.—Class II. 
Metals brittle, easily fusible and volatile. 
ARSENIC. 
This metal has only been found in New Zealand in a native state, in the 
form of arsenical pyrites, and in one instance as Dufrenoysite, a description 
of which will appear under the lead ores. 
Jative Arsenic.—The first mention of this mineral in New Zealand is 
by Dr. Hector (Trans. N.Z. Inst., vol. ii., p. 368), where he states that it 
occurs at the Kapanga Mine, Driving Creek, Coromandel, associated with 
gold; and subsequently Captain Hutton, in his report on the geology of 
Coromandel (Geological Reports, 1870-1, p. 5) again mentions its occurrence 
in the same locality. 
The specimens which I have seen are all reniform and massive, and have 
all been obtained from the Kapanga goldmine; they are all tarnished to a 
blackish-grey colour, and are sometimes deposited on cale spar. In some 
cases free gold can be seen on the surface of the arsenic. 
Dr. Hector informs me that he had the good fortune to see a specimen 
extracted from the No. 5 Driving Creek Mine, which showed in a very 
characteristic way the manner of occurrence of this metal. 
The specimen consisted of a geode or cavity, formed at the point of inter- 
section of two slender quartz veins, which was lined partly up its sides by a 
coating of quartz. On this a mass of Calcite was crystallized, while both on 
and through the mass of these Calcite crystals arsenic had been deposited in 
a botryoidal form. On the surface of this was a deposit of Chalcedony, from 
which long slender quartz crystals had grown, and by @ subsequent action 
the terminal facets of these had been coated by small globular patches of 
arsenic, as if sublimed, sprouting from which were beautiful erystalline 
filaments of gold. 
Although, as is much to be regretted, this specimen was not secured for 
the Colonial Museum, having been presented to H.E. Sir George Bowen, 
still, specimens collected by Dr. Hector from the same druse are yet in the 
Possession of the Geological Survey, and these demonstrate the interesting — 
