Reports and Proceedings — Royal Physical Society, 8fc. 141 



polished, and more or less moutonnee. Here also the ice came from 

 a southerly point. These beds are succeeded by Pertuo-Carbon- 

 iferous glacial beds having an approximate thickness of at least 20U0 

 feet, consisting of mudstones with well-glaciated boulders. 



It is extremely prohable that the glacial beds of Bacchus Marsh, 

 Wild Duck Creek, and Springhurst in Victoria were of homot axial 

 if not contemporaneous origin, and they may probably be correlated 

 with the glacial conglomerates at Mount Reid in Tasmania, th^se 

 correlations being mainly hased on lithological evidence. The 

 evidence for the correlation of the Bacchus Marsh glacial beds with 

 the erratic-bearing Permo-Carboniferous mudstones of Maria Island, 

 One Tree Point, and Bruni Island in Tasmania, of Maitland, Branxton, 

 and Grasstree in N.S. Wales, and of the Bower River coalfields in 

 Queensland, is that the genus Gangamopteris is distributed somewhat 

 abundantly throughout the formations in all these localities. 



This glaciation was probably homotaxial with that of the period 

 of the Dwyka Conglomerate and Ecca Beds of Southern Africa, 

 and of the Talchir Group of the Salt Range of India, the Boulder 

 Beds in Western Rajputana, and the Panjak Conglomerates of 

 Kashmir. In the case of Southern Africa and India, as in that 

 of Australia, the general direction in which the ice moved appears 

 to have been from south to north. In the Bacchus Marsh beds there 

 are at least nine or ten distinct boulder-beds separated by sandstones 

 and conglomerates ; this may possibly indicate a sequence of glacial 

 periods separated by milder interglacial periods. The glacial con- 

 ditions in Australia may have been prolonged into early Mesozoic 

 times, as indicated by the Mesozoic facies of certain plants in the 

 uppermost glacial beds of Bacchus Marsh. 



Royal Physical Society of Edinburgh. 



February 19th, 1896.— Prof. Struthers, M.D., LL.D., in the Chair. 



Mr. J. S. Flett, M.B., B.Sc, read a paper on his ' ; Discovery in 

 Orkney of the John o' Groat's Horizon of the Old Red Sandstone." 

 The strata examined and described in this paper were in the parish 

 of Deerness, on the mainland of Orkney, and from them he had 

 obtained Microbrachius Dicki (Peach), Dipterus macropterus, Traq., 

 and Tristichopterus alalus, Egert., species which had hitherto been 

 found only in the John o' Groat's beds in the north-east of Caithness. 

 The identification of these fishes was confirmed by Dr. Traquair, to 

 whom Mr. Flett had submitted his specimens for examination. 



Geologists' Association. — At the Annual Meeting of the 

 Association, held on Feb. 7th, 1896, Mr. E. T. Newton, F.R.S., was 

 elected President, and Mr. H. W. Monckton was elected Excursion 

 Secretary in the room of Mr. T. Leighton, who for a number of 

 years has filled that arduous office with great success. The retiring 

 President, Lieut.- General C. A. McMahon, read an address on 

 " Some Structural Characteristics of the Granite of the N.W. 

 Himalayas," illustrated by numerous lantern-slides. 



