Typo. Etching Co. Sc. 



Note.— The only geological map of New South Wales, aa a whole, yet pub- 

 lished is that which accompanies Mr. Wilkinson's ' Notes on the Geology of 

 New South Wales.' It is based on the original map compiled by the Eev. W. B. 

 Clarke, F.R.S., and is on a scale of about 30 miles to 1 inch, of course much too 

 small to display detailed geology. On it the limits of the Silurian and 

 Devonian rocks are certainly not drawn correctly for the neighbourhood of 

 Bathuist. 



The accompanying sketch-map has been drawn up by the writer from his 

 own observations, and, although on a small scale, is yet, it is believed, suffi- 

 ciently clear to enable the geology of the district, which is comparatively 

 simple, to be understood. The zone of rocks highly altered by contact-meta- 

 morphism was symbolized in the Original sketch by a thick line drawn round 

 the junction of the Silurian and the granite, but this has been unintentionally 

 omitted by the draughtsman who recopied the map. For 'Nap Reef read 

 ' Napoleon Reef ; ' for ' Glanmure ' read ' Grlanmire.' 



[Since this paper was written, a new geological map has been issued by the 

 Department of Mines, N.S.W. It is on a scale of about 15 miles to the inch, 

 and is in all respects a great improvement on the old one.] 



