40 PROF. J. W. GEEGORY ON THE [Feb. I9°4-> 



range, and limited to the highlands of the Central Plateau. Johnston 

 considered 1 Sprent's erratics 



' as due to small glaciers in alpine situations, of which there is some evidence 

 in the deep sub-alpine valleys of the Western Highlands of Tasmania.' 



The author was emphatic 2 that 



' there is no similar evidence [to that in the Northern Hemisphere] of a severe 

 Glacial Period in the Southern Hemisphere.' 



He repeats that 



' in Tasmania a greater elevation of the land, dating from the close of the 

 Palaeogene Epoch, result[ed] in a limited amount of glaciation in alpine regions 

 only.' 



Further arguments in support of the view that Tasmania had 

 suffered no severe glaciation in Kainozoic times were advanced, in 

 1886, by Prof. F. W. Hutton, 3 on the evidence of the distribution 

 of Siphonalia maxima. He maintained that 



' Tasmania has not undergone a glacial epoch since S. maxima lived on its 

 shores.' 4 



The first conclusive evidence of Pleistocene glacial action in 

 Tasmania was published by Mr. E. J. Duun in 1894. 5 In this 

 paper he showed the occurrence of an extensive glaciation in the 

 country around Lake Dora, to the north-east of Mount Tyndall. 

 Mr. Dunn's experience as a glacial observer left no room for doubt 

 as to the accuracy of his observations ; but they were confined 

 to the evidence of glacial action on the summit of the Western 

 Highlands, and gave no proof of any extension of the glacial 

 action to low levels. Mr. Dunn also recorded the occurrence near 

 Mount Head, north-west of Mount Tyndall, of some glacial deposits 

 belonging rather to the close of the Palaeozoic or beginning of the 

 Mesozoic Era. Their altitude is apparently about 1100 feet above 

 sea-level. 



A further account of the glaciation near Mount Tyndall was given 

 by Mr. T. B. Moore in a short, but important, contribution issued in 

 1 ^i)4. G He described abundant traces of glacial action around 

 Mount Tyndall (3875 feet) and Mount Sedgwick (4000 feet) ; and 

 stated that the rocks were glaciated to within 20 feet of the summit 

 of Mount Tyndall, and to near the summit of Mount Sedgwick. 

 The eastern slopes of those mountains he described as swept bare 

 by glacial action. On the north-eastern side of Mount Geikie 

 (13950 feet) he found a well-marked roche moutonnoe, which he 

 named after Montgomery. He gave further information as to a 

 glaciated rock, found by Mr. Dunn, which he called 'Dunn's Boss,' 



1 ' The Geology of Tasmania ' 1888, p. 'lib. - Op. cit. p. 296. 



3 'On the supposed Glacial Epoch in Australia' Proc. Linn. Soc. N.S.W. 

 vol. x, 1885 (1886) pp. 331-41. 



4 Op. cit. p. 337. 



5 ' Glaciation of the Western Highlands (Tasmania)' Proc. Eoy. Soc. Vict, 

 n. s. vol. vi (1894) pp. 133-38 & pi. viii. 



6 'Discovery of Glaciation in the Vicinity of Mount Tyndall in Tasmania ' 

 Proc. Eoy. Soc. Tasm. vol. iv, 1893 (1894) pp. 147-49. 



