BY W. F. PETTERD, C.M.Z.S. 197 



minute particles with crocoisite, Adelaide Proprietary Sil- 

 ver Mine, Dundas. 



338. ViviANiTE (Phosphate of Iron). 



In groups of crystals, which are occasionally nearly half 

 an inch in length; from cleavage planes in rock, adit, Mt. 

 Bischoff; in blue and green amorphous clay-like mass, 

 Waratah River; in crystallised bunches. No. 1 North 

 Pioneer Reef, at Watsrhouse ; as a soft clay impregnated 

 with the phosphat-e, Supply Creek; of a dark-blue colour 

 in fibrous radiating bunches, with granular quartz, Lucy 

 Creek, Pieman River ; in large quantity disseminated in 

 decomposing argillaceous shale. North Bischoff. 



339. VoLTziTE fOxy sulphide of Zinc). 



Formed as an incrustation of a thin lamellar structure, 

 and globular ; colour, clove-brown ; very rare. Silver 

 Crown Mine, Zeehan. Also in small quantity at the Her- 

 cules Mine, Mt. Read. 



340. Wavellite (Hydrated Phosphatt of Aluminium). 



This is always in all known localities a rare mineral. 

 It has been discovered in a rock-cutting in a greyish-green 

 clay slate. The mineral occurred in the cleavage planes 

 of the rock in the form of flaky radiating discs and hemi- 

 spherical forms of a white and glistening appearance, 

 which are usually under an inch in diameter. 



Australasian Slate Quarry, Back Creek; on the Forth 

 River, south of the Van Diemen's Land Company's block in 

 1864. associated with galena and blende (James Smith) ; 

 at Mt. Ramsay, as whit-e circular patches with a strongly 

 radiating structure and glistening surface, implanted upon 

 hornblende ; of small size in altered slate at Mt. Bischoff ; 

 also at the Den, near Lefroy. 



This mineral was first noticed by Professor G. H. F. 

 TJlrich, about 1876, on the occasion of an inspection of, and 

 report upon, the Australasian Slate Quarry, Back Creek, 

 for Messrs. Lyell and Gowan, Melbourne. Many fine 

 examples were then collected, a series of which Professor 

 TJlrich placed in the mineral collection of the Technological 

 Museum, Melbourne. Occurs in small white discs, with 

 the characteristic radiating structure implanted on the 

 cleavages of sandstone ; Ballast Quarry, Zeehan-Comstock 

 Line ; also as small globular aggregates of a pale yellowish- 

 green, in cavities in limestone, Mole Creek. 



