44 Reports and Proceedings — GeoIo(jic((l Socief// of London. 



Tables of fossils enable tbe autbor to establisli a complete com- 

 parison of tbe wbole of tbe local zones of tbe Ebayader district with 

 those of Southern Scotland, Wales, and Sweden. In tbe Ebayader 

 area we find, for tbe first time in Britain, tbe entire Valentian 

 succession developed in one general sequence of rocks, with a more 

 or less common h'tbological character, and with a fauna composed 

 throughout of similar pala^ontological types. 



11.— December 6, 1899.— W. Whitaker, B.A., F.R.S., President, in 



the Chair. 



Dr. Blanford said that be had been asked by Professor Judd, who 

 was unable to attend, to say a few words about certain photographs 

 sent by Mr. E. H. L. Schwarz, and representing the Dwyka 

 boulder-bed and tbe rounded and grooved underlying surface, in 

 the neighbourhood of the Orange River near Hopetown and Prieska. 

 The importance of these photographs lay in tbe evidence which they 

 afforded on a disputed point. Dr. Sutherland and Mr. Griesbach 

 had called attention to tbe evidence of ice-action presented by the 

 Dwyka Conglomerate in Natal, and additional evidence bad been 

 brought forward by several observers, especially by Mr. Dunn from the 

 Orange Free State and Cape Colony, and recently by Dr. Molengraaff 

 from the Transvaal. Other observers, however, and especially the 

 late Professor Green, bad disputed the glacial origin of tbe Dwyka 

 beds. Tbe photographs now exhibited would, tbe speaker thought, 

 convince most geologists that tbe phenomena presented were due to 

 ice-action. The resemblance to similar photographs shown to the 

 Society in 1896 by Professor T. W. Edgeworth David, and repre- 

 senting the beds corresponding to the Dwyka Conglomerate in South 

 Australia, was noteworthy. Evidence of glacial action in Upper 

 Palfeozoic times bad graduall}'^ accumulated from India, Australia, 

 and South Africa, and there was a probability that similar indications 

 existed in South America. 



Tbe following communications were read: — 



1. " On tbe Geology and Fossil Corals and Eclninids of Somali- 

 land." By Dr. J. W. Gregory, F.G.S. 



British Somalilaud consists of a high plateau, of which the 

 northern scarp is separated from the Gulf of Aden by a belt of low 

 hills and plains known as the Guban. Tbe southern plateau 

 consists of Archaean gneisses, quartzites, amphibolite - schists, 

 chloritic schists, and pegmatites. It is capped by purple grits, 

 red sandstones, and conglomerates, which are covered by limestones 

 of Neocomian, Turonian (? Cenomanian), and Eocene ages. The 

 Neocomian limestone, which may be correlated with that of Singeli 

 described by Rocbebrune, occurs at Dobar in the Guban ; while 

 a Jurassic limestone, probably of Bathonian date, occurs at 

 Bihendula in tbe Guban. Fossils collected from these limestones 

 and from raised reefs of Pleistocene age, by Mr. and Mrs. Lort 

 Phillips, Miss Gillet, Mr. G. P. V. Aylmer, Captain E. T. Marshall, 



