﻿Vol. 6 1.] PKOCEEDINGS OF THE GEOLOGICAL SOCIETY. lxXXvii 



February 22nd, 1905. 

 J. E. Make, Sc.D., F.R.S., President, in the Chair. 



Edward Andrewes, B.Sc, Mining Engineer, Portmadoc (North 

 Wales) ; Moses Kellow, Bryn, Croesor, Penrhyndeudraeth (North 

 Wales); Geoffrey A. Longden, Mining Engineer, Pleasley, near 

 Mansfield ; and John Dunlop Millen, Launceston (Tasmania), were 

 elected Fellows of the Society. 



The List of Donations to the Library was read. 



Dr. F. A. Bather exhibited a series of Danish rocks 1 

 illustrating : 



(1) the share that Echinoderms may take in rock-building ; 



(2) the transition from the Secondary to the Tertiary Era in 



the Baltic basin near Denmark ; 



(3) the special conditions at the close of the Glacial Period, 



in the limited area where alone these rocks are now 

 found as erratic blocks. 



The specimens comprised : — (a) Fragment of a boulder from the 

 Free Harbour of Copenhagen, consisting of rock from the zone of 

 Crania tuherculata, and containing many unrolled echinoderm- 

 fragments ; it appears to have been formed in shallow water. 

 (6) Fragment of a boulder from Langeland, consisting of rock 

 of Paleocene age, and containing rolled fragments of Cretaceous 

 echinoderms with shells of Tertiary molluscs ; (c) Fragment of a 

 similar boulder, showing signs of further detrition ; (d) Fragment 

 of a boulder from the island of Riigen, with echinoderm-fragments 

 still more rolled. All these rocks appear, from the distribution of 

 the boulders, to have been deposited in a basin of the Baltic 

 between Scania and the islands of Riigen and Bornholm, where the 

 Paleocene sea was shallower than on the west of Denmark. 



The following communications were read : — 



1. ' On the Order of Succession of the Manx Slates in their 

 Northern Half, and its Bearing on the Origin of the Schistose 

 Breccia associated therewith.' By the Rev. John Frederick Blake, 

 M.A., F.G.S. 



2. ' On the Wash-outs in the Middle Coal-Measures of South 

 Yorkshire.' By Francis Edward Middleton, F.G.S. 



1 The rocks have been described in papers by K. A. Gronwall, Danmarks 

 geol. Undersog. II. Ktekke, No. 15; Medd. Dansk geol. Foren. vol. x, p. 1; 

 and Jahrb. Preuss. geol. Landesanst. vol. xxiv, p. 420 : all in 1904 ; also by 

 W. Deecke, Mitth. naturwissensch. Ver. Nenvorpoinmern, vol. xxxi (1899) p. 67. 



