Cox. — On the Mineratogy of Neiv Zealand. 433 



crystals." This is the only instance yet recorded of the occurrence of 

 Calamine in New Zealand. Zinc also enters into the composition of Eich- 

 mondite previously referred to. 



Lead. 



The ores of lead which have hitherto been discovered in New Zealand 

 are native lead, Galena, Dufrenoysite, Mimetesite, and Bournonite, as well 

 as a doubtful case of Pyi-omorphite, and red oxide of lead. 



Native Lead. — In the Greol. Eeports, 1870-71, p. 85, Mr. Skey mentions 

 the occurrence of native lead in the wash of a creek at the Thames. It 

 occurs in the form of shot, but was found at the very commencement of the 

 goldfield, so may possibly lay claim to being the native metal. 



Galena, Pb'. — This mineral is widely distributed in the colony, but has 

 not hitherto been worked. The first mention of its occurrence is by Mr. J. 

 C. Crawford in his " Essay on the Geology of the Wellington Province," p. 5, 

 where he mentions that specimens were brought by Professor Hochstetter's 

 party from the Kaimanawa Eanges. In the Jurors' Eep. N.Z. Ex., pp. 404, 

 265, and 437, mention is made of the occurrence of Galena in the Nelson 

 District, and also pretty generally throughout the colony, but in most 

 instances associated with a great deal of quartz. Captain Hutton has 

 mentioned its occurrence at Great Barrier Island ; Perseverance Mine, 

 Collingwood ; and also at the Thames — this last district being again 

 referred to by Mr. Skey and Mr. Davis. Dr. Hector refers to the silver 

 lead ore of the Wangapeka, and I have mentioned its occurrence as thin 

 veins in a large quartz reef at Eichmond Hill, Collingwood ; in boulders in 

 the rivers on the West Coast, south of Mount Cook ; and associated with 

 pyrites at the Mount Eangitoto Mine. These comprise the principal locali- 

 ties at which Galena has been discovered, but the only one in which the ore 

 has been yet found in sufficient quantities to promise well for opening a lead 

 mine is at Bedstead Gully, Collingwood, where some rather important 

 deposits were discovered in the workings of the Perseverance Gold Mining 

 Company, but even these have received but little attention. Galena occurs 

 in all degrees of coarseness from a very fine grained ore to a coarsely crystal- 

 lized variety, and the samples which have been assayed for silver show a great 

 variation in the proportions of this precious metal contained by them, but a 

 notice of these will more properly be placed under the silver ores. The crys- 

 tals observed have been uniformly cubes, the octahedron never being seen. 



Dufrenoysite, Pb' + ^ As^ S^ — Great Barrier Island. The composition of 

 the type mineral as given by Dana is 



Sulphur .. .. .. 22-1 



Arsenic .. .. .. 207 



Lead 57-2 



47 100-0 



