T 



Hefietvs — T/ie Cottestoold Clah. 41 



VI. — The Cotteswold JSTaturalists' Field Clue. 



HE Proceedings for September, 1907, being part 1 of vol. xvi, 

 contain a record of the excursions of this Club during 1906, and 

 of the Winter meetings of 1906-7. An interesting excursion to the 

 Lickey Hills was made under the direction of Professor Lapworth, 

 and another notable excursion, in celebration of the 60th Anniversary 

 of the Club, was made to Bourton-on-the- Water and Burford. 

 Among the papers published is one by Mr. S. S. Buckman on " Some 

 species of the genus CinctaP Of these the genotype is Terehratula 

 numismalis, Yalenciennes, afterwards known as Waldheimia tiuinismalis. 

 Two plates are given to illustrate this and nineteen other forms of 

 Cincta. Another paper of considerable interest is by Professor C. Gr. 

 CuUis and Mr. L. Richardson, entitled " Some remarks on the Old Red 

 Sandstone Conglomerate of the Forest of Dean and the Aurifei,'ous 

 Deposits of Africa." During the course of last year some stir was 

 made in the newspapers about a discovery of gold in a locality about 

 200 miles distant from London. The locality is in the Old Red 

 Conglomerate about one and a half miles south-west of Mitcheldean 

 Road Station. The authors report that a small amount of both gold 

 and silver do occur, "but it still remains to be proved that the gold 

 occurs in any part of the rock, either at or below the surface, in 

 sufficient quantity to be workable with profit." 



iaEi:jpoi?,TS .A^nsriD i^i^ocEEiDiisrGrS. 



I. — Geological Societx op LoNcoisr. 



1.—Novemher20t]i, 1907.— Sir Archibald Geikie, K.C.B., D.C.L., Sc.D., 

 Sec. R.S., President, in the Chair. 



The following communications were read: — 



1. " Glacial Beds of Cambrian Age in South Australia." By the 

 Rev. Walter Howchin, F.G.S., Lecturer in the University of Adelaide. 



The known extension of the beds in question is 450 miles from 

 north to south (Onkaparenga River to Willouran Range). The 

 greatest width across the strata between Port Augusta, at the head of 

 Spencer's Gulf, in an easterly direction to the Barrier Ranges of New 

 South Wales, is about 250 miles. The beds occur as part of a great 

 conformable series, in the upper part of which Cambrian fossils have 

 been found. The rocks above the glacial beds are mainly purple 

 slates and limestones ; below they are quartzites, clay-slates, and 

 phyllites, passing into basal grits and conglomerates, resting on a pre- 

 Cambrian complex. The beds consist of a groundmass of unstratified 

 indurated mudstone, more or less gritty, carrying angular, subangular, 

 and rounded boulders, up to 11 feet in diameter. In most sections 

 there are more or less regularly stratified bands. The thickness of the 

 glacial series has been proved up to 1,500 feet. The commonest rock- 

 type among the boulders is a close-grained quartzite ; but gneiss, 

 porphyry, granite, schistose quartz, basic rocks, graphic granite, 

 mica- schist, and siliceous limestone occur. The discovery of ice- 

 scratched boulders has placed the origin of the beds, according to the 



