172 Proceedings of the Royal Society of Victoria. 



Phascolomys pliocenus^ from " the hard ferruginous gold cement 

 of Dunolly," — " Of great interest as thus showing that our gold 

 drifts are not ' alluvial,' but of the more ancient Pliocene Tertiary 

 period, at least as old as the Mammaliferous Crag ; thus corres- 

 ponding in age with the gold drifts of the Ural." 



In Victoria we have in the Palaeozoic the introduction of such 

 subdi visional terms of the Silurian and Ordovician as — Ludlow, 

 Wenlock shales. May Hill sandstones, Bala rock, Llandeilo flags, 

 for which the late Sir Frederick McCoy has been responsible, and 

 as a consequence we find these terms on our geological maps and 

 quarter-sheets, and through our various geological reports. We 

 may also note references to Arenig, Tremadoc and Caradoc." Is 

 it wise to accept these subdivisions from our colonial work ? 



We find then, according to Professor McCoy,^ Llandeilo flags 

 or Bala rock to the north of Camp, Lancefield, Llandeilo flags at 

 Bendigo, also in the parish of Bulla, etc. ; Bala at Bulla^; 

 Wenlock shale at Keilor^ ; May Hill sandstone at Moonee 

 Valley®; Upper Ludlow at Johnston-street, Collingwood^; and 

 many others needless to quote. The Lilydale limestone has been 

 referred to the Wenlock series by Mr. R. Etheridge, junr.,^ and 

 the Rev. A, W. Cresswell.^ 



In connection with the Ordovician Rocks of Victoria, Mr. T. 

 S. Hall in a recent paper^" remarks, " The general sequence of the 

 Victorian graptolites may be correlated with that of the Northel'n 

 Hemisphere, but experience has shown that it is unsafe to push 

 the analogy too far, and that the only safe method is that of 

 detailed stratigraphical work. Thus we find forms here 

 associated which elsewhere are separated by intervening zones ; 

 and, on the other hand, forms elsewhere associated may be here 

 separated." In our Tertiary series also far too much has been 

 made of resemblances to or diflerences from English or European 

 representatives. 



1 Prod. Pal. Vic, Dec. i., p. 22. 



•-' Lapworth, Geological Magazine; T. S. Hall, A.A.A.S., Sydney, vol. vii., 1898, p. 402. 

 3 Prod. Pal. Vic, Dec. i., p. 9. 

 * Op. cit., Dec. ii., p. 36. 

 5 Td., p. 37. 



<> Op. cit., Dec iii., p. 20. 

 7 Op. cit., Dec. vi., p. 27. 



s Records of the Australian Museum, vol. i.. No. 3, p. CO, and No. 7, p. 125. 

 9 Proc Roy. See Vic, vol. v., n.s., 1893, p. 38. 

 10 Geol. Mag., n.s., Dec. iv., vol. vi.. No. x., Oct. 1899, p. 440. 



