BY W. F. PETTERD. Ppl 
aluminium. It is found associated with Cassiterite in lodes 
occurring in Granitic rocks. Ben Lomond; Ethel mine, Blue 
Tier: North Pieman River, near the coast; Gould’s Country ; : 
Black Bluff Mountain; Mount Thomas, near Mount Claude ; 
Castra, Upper Leven. 
Wolfram ma y be known from Cassiterite by its perfect cleavage, 
which is a constant character; the latter mineral has always ‘a 
eranular structure. 
240. WAD (an impure mixture of the Oxides of Iron, Manganese, 
and other elements). 
A common associate of other ores of Manganese, usually 
occurring in botr yoidal masses and bunches. Godkin and Heazle- 
wood Silver-lead mines, Heazlewood ; often met with at Dundas 
and Zeehan. 
This is not a species, but simply a mixture of decomposed 
minerals ; when it contains a few per-centum of Cobalt oxide it is 
termed Asbolite. 
241. YTTROCERITE ( Hydrofluoride of Calcium, ¥ttria, and 
Cerium). 
An extremely rare mineral, occurring in amorphous masses, 
which usually have a sub-crystalline to earthy structure. Its 
only known locality in this island is Mount Ramsay, where, Mr. 
W. R. Bell informs me, it forms reddish-brown irregular flakes 
and patches of small size in the Hornblende rock of the locality. 
242. ZINCITE (Oxide of Zinc). 
Found as minute crystals and as small patches on Siderite and 
Quartz, which are usually aggregated in clusters. The colour is ¢ 
bright clear red. Heazlewood. 
243. ZARATITE (Carbonate of Nickel). 
This is usually termed “ Emerald Nickel” from its beautiful 
green colour. It occurs in varnish-like coatings on Chromite 
and Magnetite, upon either of which it is invariably parasitic ; at 
its original locality it sometimes forms mammillary or stalactitic 
crusts on the same iron minerals. It is mineralogically a rare 
and local form, its principal and original locality being Texas, 
Pennsylvania, U.S. America: it occurs in less quantity in Shetland 
and Spain. It is not known to occur in Australia. In physical 
character it closely resembles the well known commercial Nickel 
ores of New Caledonia (Garnierite and Noumeaite), but they are 
hydrated silicates of Magnesia and Nickel. So far as known 
Zavatite is not of any economic value, although if discovered in 
large quantity it could probably be worked with profit. 
Heazlewood, on a high hill on the north side of the river, with 
Serpentine and a small ¢ quantity of Pentlandite, 
