4. 
osmiridium mining and the old Great Western 
Railway survey may still be traced in places 
following much the same route. 
Kallista is in the centre of a basin in old 
palaeozoic rocks the same as those of the west¬ 
ern mining fields. Mining prospects abound 
all round. There was a gold prospect almost 
at the siding. A little way Forth was the 
Humboldt Mine which gave gold, silver, copper, 
lead, zinc and ironc Other scratchings for 
gold can be seen west of Junee. There are 
persistent rumours of rich copper deposits on 
the flanks of Mueller, Osmiridium can be 
dished out of all the creeks. 
The new railway cuts through some folds 
of the rocks in which have been found the int¬ 
eresting fossils known as trilobites and the 
whole district abounds in features of geolog¬ 
ical interest. Along the forest tracks 
wallaby and other animals roam nightly and 
little oppossum mice may visit any camp. The 
devil himself is not extinct in this area. The 
stream near the railway should yield platypus 
to a careful searcher. Above all, there is 
the luxuriant rain forest of the West with its 
wealth of plant life to be studied and enjoyed, 
and even where this has suffered the ravages 
of bush fires, huge tree ferns are beginning 
to replace the damage. 
Trilobites . 
Trilobites were primitive crustaceans,some¬ 
what resembling a gigantic wood-louse, often 
4 inches long by 2 inches broad. The family 
is now entirely extinct and only to be found as 
fossils in lower palaeozoic rocks. They are 
world wide in distribution and are most useful 
in correlating these early rocks in different 
parts of the world. 
