366 Transactions. —Geology. 



Mr. Skey, the Government Analyst, describes a mixture of 

 this mineral and stibnite from Waikaii containing 78-9 per 

 cent, of antimony. 



Pyromoephite (Phosphate and Chloride of Lead). 



A small specimen of this mineral was forwarded to me 

 from the Champion Mine, Tui Creek, Te Aroha, towards the 

 end of 1891. It occurred as an incrusting layer of small, irre- 

 gular, yellowish-green crystals, on a yellowish-brown crypto- 

 crystalline quartz, which is found associated with the galena- 

 lode in that mine. It has not been identified in any other 

 part of New Zealand. 



Anglesite (Sulphate of Lead). 



In 1889 I collected several examples of this mineral at the 

 Champion Mine, Te Aroha, where it occurred in thin veins 

 and small threads in the galena-lode, especially near the out- 

 crop. Its colour was greyish-white, and it occurred in a 

 massive form. 



In a paper read before the Auckland Institute in October, 

 1885, Mr. J. A. Pond, F.C.S., stated that the ore-body cut in 

 the low-level tunnel at the Surprise Mine, Te Aroha, was a 

 sulphate of lead, containing a few enclosed grains of galena. 

 This appears to be the first record of this mineral from this 

 colony. 



Cekussite (Carbonate of Lead). 



During a visit to Te Aroha, in 1889, I collected this 

 mineral at the Champion Mine, where it occurred in a quartz 

 lode in large lenticular-shaped shoots. In the paper referred 

 to above Mr. Pond described the lode in the Surprise 

 Mine, which, near the surface, he stated was composed prin- 

 cipally of carbonate of lead. 



The lustre of the Tui Creek cerussite which I possess is 

 vitreous or resinous, and the colour greyish-white to dark- 

 brown. It occurs in a compact, granular or massive form, 

 and crystals are rare. 



The rocks at Te Aroha, in which the last three minerals 

 are found, consist principally of indurated tuffs and ash-beds, 

 with which are associated flows of solid hornblende-andesite 

 and dacite. 



Genthite (Hydrated Silicate of Nickel and Magnesia). 



During the operation of clearing away a slip on the Tapu 

 Koad, in the month of September, 1891, the roadmen dis- 

 covered a small vein of this rare and interesting mineral. I 

 subsequently examined the locality, and found it situated 



