INAUGURAL ADDRESS. 49 



1890. Etheridge, R., juu. (Trans. Roy. Soc, S. Aust., vol. xiii., 

 p. 10). 



1892. Tate fid., vol. xv., page 183). 



(bj West Australia. 

 1890. Etheridge, R,, jun. (Geol. Mag., vii., p. 97), describes 

 an Olenus and a Salter el la ixom. the Kimberley district as Cambrian. 



LOWER SILURIAN. 

 faj Victoria. 

 1858. Selwyn (Quart. Journ. Geol. Soc, vol. xiv., p. 533) drew 

 the line of demarcation between the auriferous graptolite slates 

 and Upper Silurian, which McCoy had shown to have faunas 

 characteristic of the corresponding series in Europe, and thus estab- 

 lished the fact of the specific identity of the two faunas over the 

 whole world. 



fb) Central Australia. 

 Fossiliferous limestone, discovered in tlie Macdonnell Ranges by 

 C. Chewings (Trans. Roy. Soc. S.A., vol. xiv., p. 249*, 1891) 

 was referred by Tate, id., p. 255, to Upper Silurian, and by 

 R. Etheridge, jun. (Pari. Paper, S.A., No. 158, pt. 9t, 1892, 

 No. 23, 1892; No. 50, 1893), to Lower Silurian. 



fcj West Australia. 

 The existence of Silurian rocks forming the Mount Barren Range, 

 as reported by F. T. Gregory (Quart. Journ. Geol. Soc, vol. xvii., 

 p. 479), has not been proven; Avhilst the clay slates and schists 

 described by H. Y. L. Brown (Pari. Paper, W.A.) may be Archaean ; 

 at any rate, their Silurian age has not been conclusively determined. 



UPPER SILURIAX. 



fa) Neiv South Wales. 



(yASS and HUME SERIES.) 



1838. Mitchell, Major T. ("Three Expeditions," &e.), dis- 

 covered coralliferous limestones about Yass Plains. 



1840. Vernueil (Bull. Soc. Geol. de France, xi., p. 177) 

 recorded Silui-ian fossils from New Holland [probably from Mur- 

 rumbidgee, teste W. B. Clarke, " Sedimentary Formations," 1878.] 



1845. Morris (in Strzelecki's " Phys. Description," p. 296) 

 considered the limestone about Yass Plains [and Shoalhaven] as 

 the probable equivalents of the Devonian system in Europe. 



• ReadJuiie2nd, 18'Jl. t Submitted September 9th, 1891. 



D 



