52 MINERALS OF TASMANIA. 
171. PSILOMELANE (Oxide of Manganese). 
Equally as abundant as the last mentioned and often associated 
with it. A common mode of occurrence is of stalactitie form as 
well as arborescent groups of dentritic markings caused by the 
infiltration of this mineral in the crevices and fractures of rocks. 
It always occurs amorphous, opaque, and of dark colouration. 
Common at the Penguin River ; Heazlewood ; Dundas ; Zeehan; 
Magnet Range, and many other localities in lesser quantity. 
172. PLAGIONITE (Sulphantimonite of Lead). 
Occurs as indistinct oblique tabular crystallizations, and as 
massive pieces of small size. The colour of the samples obtained 
is a dark lead-grey, but it is generally tarnished. The identifica- 
tion is uncertain. 
Heazlewood. 
173. PRZIBRAMITE (Sulphide of Zine and Cadmium). 
Cadmiferous blende occurs massive and in considerable quantity 
near the Scamander River on the East Coast, at several localities in 
the Ben Lomond district, and more sparingly at the Heazlewood. 
174. PHOLERITE (Hydrated Silicate of Alumina or Hydro- 
mica). 
A soft and friable substance, with a submetallic appearance and 
scaly structure. 
Mount Bischoff (?) ; West Coast (exact locality uncertain). 
175. PHILLIPSITE (Hydrated Silicate of Alumina, Calcium, 
and Potash). 
Somewhat abundant in vesicular Basalt with other forms of 
zeolitic minerals. It invariably occurs in compound groups of 
crystals. 
Near the railway bridge crossing the Hellyer River. 
176. PYROPHYLLITE (fydrated Silicate of Alumina). 
In small radiated masses, which are sometimes foliated ; it has 
a subtransparent pearly lustre. 
Near Oatlands (granular and subcrystalline) ; Bischoff; Table 
Cape. 
177. PORCELLANITE (Silicate of Alumina). 
A milk-white compact porcelain-like substance of close, even 
- texture, probably clay altered by heat. 
Mount Lyell. 
178. PIMELITE (Hydrated Silicate of Alumina, Nickel and 
Magnesia). 
Always of an apple-green colour. Occurs rarely as small 
