73 
wherein there are some of the most beautiful and characteristic 
sharp-edged triclinic crystals of axinite of a brown-violet color, 
and whose edges, where broken, exhibit the curious serrated 
fracture of that mineral. These crystals are, roughly, from 
2” to }” across. In the section they are very pleochroic. 
Many of them show cleavage cracks parallel to 010 (xc P&) 
and the polarisation-tints are not high. If it occurs, as I 
imagine, in contact with the granite, which forms Rosetta Head, 
it can easily be understood that the conditions would be favorable 
to the occurrence of axinite. Jam not aware that axinite has 
before been recorded for South Australia, though Liversidge 
[‘‘ Minerals of New South Wales,” p. 183] has recorded it for 
that colony. 
The zircons seen in the section of this rock are very good. 
Taking it on the whole, axinite-amphibolite seems the most 
suitable name for it. The augite is frayed and bent in places. 
V. Eprpote Rock, Wooltana, Far North Ranges. 
Epidote of a greenish-yellow color and with high refractive 
index, for the greater part, composes this rock, which is exceed- 
ingly compact, fine-grained, and has a sp. gr. of 3:18. It 
seems rather altered and does not show much pleochroism. The 
hand specimen on one side shows some of the characteristic 
pistachio-green epidote. Magnetite in irregular grains is scattered 
throughout the mass There is a mineral, probably secondary 
quartz, filling up interstitial spaces. In mass it is of a very 
dark-green color and heavy. In the section the epidote appears 
to be quite granular, and it makes up by far the larger part of 
the rock, which seems to present no particular feature of interest. 
VI. ALTERED AMPHIBOLITE (with Epidote), Hale River, lat. 23° 
This is composed chiefly of hornblende, with the usual 120° 
cleavage cracks ; some of the hornblende is twined. It contains 
also a good deal of hornblende altered to chlorite and epidote. 
The epidote fills up the cracks. A little secondary augite is 
present. 
Some parts of the section appear greatly clouded. Its polari- 
sation-colors are most beautifully bright and the whole mass is 
greatly altered. The sp. gr. =3:10. 
It is holocrystalline and the texture inclines to coarse. It is 
an amphibolite which has undergone change. 
VII. Atrerep Diorirse, Hale River, lat. 23° 40’ S. 
This rock is a diorite, which has been somewhat altered. It is 
composed of hornblende, showing splendid cleavage cracks inter- 
