176 Proceedings of tJte Royal Society of Victoria. 



Several much finer examples of necks have since been discovered 

 in the neighbourhood of Sydney. References to occurrences in 

 New South Wales are appended.^ 



The accompanying geological map of portion of South Gipps- 

 land is based upon the new Geological Map of Victoria. Such 

 additional information as has been obtained since the completion 

 of that map, has been added in a general way. The whole of the 

 Waratah Bay area has been retained as Silurian, since undoubted 

 Silurian limestones occur there. Mr. Stirling speaks- of some of 

 the rocks in it as pre-Silurian and Cambrian, while Professor 

 Gregory, D.Sc, F.R.S., Director of the Geological Survey of 

 Victoria, has suggested^ the probability of the occurrence there 

 of an outcrop of pre-Ordovician rocks. 



The period to which the granite of Yanakie, Wilson's Promon- 

 tory, and Cape Woolamai belongs has not yet been definitely 

 ascertained, though generally regarded as Devonian. 



The geological map of the locality at Townsend Bluflf, Ander- 

 son's Inlet, has been prepared from field notes obtained by a 

 careful survey made with a prismatic compass and by pacing. 

 The heights are aneroid measurements. The two sections across 

 the necks are added to simply illustrate their character. 



I am much indebted to Mr. E. F. Pittman, A.R.S.M., Govern- 

 ment Geologist of New South Wales, for references to the 

 Volcanic Necks literature, to Mr. A. Cuttriss and his two sons foi* 

 the kindly help the}- have given me in various ways while the 

 examination of the locality was being carried out, and to Mr. A. 

 Elms, who accompanied and assisted me during one of my visits 

 there. 



1 David, Professor T. \V. E., Snieeth, W. F., Watt, J. A. : Preliminary Note on the 

 Occurrence of a Chromite-bearing- Rock in the Basalt at the Pennant Hills Quarr}', near 

 Parraniatta. Jour. Roy. See. N.S.W., vol. xxvii., 1893. 



Clarke. W. B. : On the Transmutation of Rocks in Australia. Trans. Phil. Soc. Aus., 

 1862-65, pp. 267-368. 



Clarke, W. B. : The Sedimentary Formations of New South Wales, 4th ed., 1878, p. 72. 

 Wilkinson, C. S. : Ann. Hep. Dept. Mines, New South Wales, for 1879, p. 218. 

 Wilkinson, C. S. : Geology, in Handbook Aus. Assoc. Adv. Sci., Sydney Meeting, p. 34. 

 Curran, J. M. : Geology of Sjdney. 



Pittman, E. F. : The Mineral Resources of New South Wales, Sydney, 1901, pp. 393-4. 

 Came, J. E. : The Kerosene Shale Deposits of New South Wales, 1903, p. 240. 



2 Op. eit. 



3 The Heathcotian, a pre-Ordovician Series— and its distribution in Victoria. Proc. 

 Koy. Soc. Vic, vol. xv. (n.s.), pt. ii., 1903, pp. 167, 173. 



