BY W. F. PETTERD. 51 
this mineral ; the bunches of crystals are intricately interwoven 
and are of a somewhat unusually dark green colour; it is often 
more or less associated with Cerussite and other lead minerals; it 
also occurs in more or less quantity in many of our silver-lead 
mines at Zeehan, Dundas, and the Heazlewood; in small vein 
with cupriferous pyrites and galena in quartz, River Lee (James 
Smith). Pyromorphite is usually found at some distance from 
the surface as the result ofthe alteration of a pre-existing mineral, 
probably Galena. 
166. PICROLITE (Fibrous Serpentine). 
A pale-green radiating variety of Serpentine, often translucent 
and asbestiform. Occurs with Bastite and Chrysotile at Dundas. 
167. PLUMBOCALCITE (Carbonate of Lead and Lime). 
In physical appearance this species has the ordinary character- 
istics of a dark-coloured Calcite. 
Several small specimens have been obtained at the Bell’s 
Reward mine at the Heazlewood. 
168. PROUSTITE (Sulphide of Silver and Arsenic). 
Ruby-silver is of extreme rarity; it was found at the Bell’s 
Reward mine in the form of very minute crystals of a clear 
erimson-red colour implanted on Calcite, with small crystals of 
galena and red blende. 
169. POLYSPHAERITE (Phosphate of Lead and Calcium). 
Occurs as minute rounded pellets which have an internally 
radiated structure : colour usually brown with a somewhat greasy 
appearance. It is found intimately associated with bunches of 
Pyromorphite and Cerussite. 
Sylvester Silver mine, Zeehan. (Alfred J. Taylor.) 
170. PYROLUSITE (Owide of Manganese). 
An abundant and widely distributed mineral, commonly found 
in botryoidal, radiating, or granular masses, rarely crystallized. 
It is black or bluish-black in colour, and is much softer than 
Psilomelane. 
Alluvial drift is often cemented into a compact mass by Ferro- 
Manganese, which is a mixture of this mineral and Limonite. Its 
more important localities in this island are:—Penguin River; 
Heazlewood; Vale of Belvoir; Mount Claude; Zeehan; Dundas; 
Meredith Range; Pieman River; Fingal and the Dial Range. 
At the Balstrup Manganese Hill mine at Zeehan small crystals 
occur intermixed with the more profuse radiated masses ; Mount 
Zeehan in flattened bundles of acicular prisms on Limonite. 
(Ballarat School of Mines Museum.) 
