The prevailing colour of the last-named species, as well as P. ursinus of Tasmania, is brownish grey.
The monoxybromide forms brownish-black needles, which melt at 277° and boil at 3 2 7.5; it is decomposed by water.
They may be recognized by the brownish violet colour they impart to a borax bead when heated in an oxidizing flame.
The colour is blackish, or of a dark olive-grey or brownish grey with round black spots or dots.
They are both reddish yellow and brownish black (according to individual variation) in skin colour, with head hair often tending to russet, and body hair of two kinds - black and bristly on the upper lip, chin, chest, axillae and pubes; and yellowish and fleecy on the cheeks, back and limbs.