28 Proceedings of the Royal Society of Victoria. 



pocket lens reveals a few minute flakes of peai'ly muscovite 

 among the felspar bands. Later on biotite takes the place of 

 muscovite though the rock is otherwise similar. This laminated 

 characteristic occurs also in the rose quartz, many pieces having 

 a distinctly banded appearance and occurring in certain definite 

 shapes apparently indicating jointing. The joint planes run 

 almost at right angles to the planes of lamination. Another 

 feature of the rose quartz is a peculiar flecking of colourless 

 quartz in a milky matrix to both of which the rose colour seems 

 to be imparted. 



The fretted fragments of gneiss and rose quartz persist to near 

 the Monaro Gap where a grey, gneissose granite, appears. It 

 is composed of quartz, medium crystals of light flesh-coloured 

 orthoclase which weathers quite white, and small crystals of 

 biotite, and is the prevailing rock on this part of the main 

 divide. 



I desire to express my thanks to Mr. A. W. Howitt, F.G.S., 

 for generously undertaking to microscopically examine several of 

 the rocks noticed ; to Mr. T. S. Hall, M.A., for his kindness in 

 revising this paper and suggesting several alterations which I 

 have gratefully adopted ; and to Mr. C. A. Robinson, for kindly 

 preparing an enlargement of the maps before mentioned. 



"With the permission of the Society I hope at a future time 

 to submit a few notes on the Geology of the country between 

 Monaro Gap and Mount Kosciusko. 



Note. — The distances and heights (aneroid) are to be taken 

 as approximate only. 



