632 Geological Society. 



and compared with similar values obtained on the -supposition 

 that not atomic weights but either ordinals or atomic numbers 

 govern this proportionality, it may be seen that atomic 

 numbers give the best values (W = atomic weights; = 

 ordinals ; M = atomic numbers) . 



Should coronium, nebulium, &c. exist, then from this we 

 must conclude that they must be isotopic with hydrogen or 

 helium, but not that the periodic system must be changed, 

 or that atomic numbers are incorrect. 



Gorsel, July 1914. A. VAN DEN BROEK. 



LXVI. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 

 [Continued from p. 160.] 



April 29th, 1914.— Dr. A. Smith Woodward, F.R.S., President ; 

 and afterwards, William Hill, Vice-President, in the Chair. 

 HPHE following communications were read : — 



1. ' On the Lower Jaw of an Anthropoid Ape (Bryojoithecus) 

 from the Upper Miocene of Lericla (Spain).' By Arthur Smith 

 "Woodward, LL.D., F.R.S., Pres. G-.S. 



2. ' The Structure of the Carlisle- Sol way Basin, and the Sequence 

 of its Permian and Triassic Rocks.' By John Walter Gregory, D.Sc, 

 F.R.S., F.G.S., Professor of G-eology in the University of Glasgow. 



The Carlisle -Solway basin has been generally represented as a 

 syncline, with the Solway resting on a great thickness of Triassic 

 rocks. A boring made near Gretna in 1794 shows, on the contrary, 

 that Lower Carboniferous rocks crop out there at the surface. This 

 boring shows that the basin is not a simple syncline. 



The evidence derived from the boring necessitates reconsideration 

 of the Permo-Triassic sequence in North Cumberland, as to which 

 the Geological Survey maps, and memoirs are not in agreement. 

 According to Mr. Holmes's view, expressed in the memoir, there 

 are two series of Gypseous Shales, one above and the other below 

 the St. Bees Sandstone. According to the classification adopted 

 on the maps, there is only one horizon of Gypseous Shales, which 

 is below the St. Bees Sandstone. Mr. Holmes's case rests on 

 the identification of the rock at the bottom of the Abbeytown 

 boring as St. Bees Sandstone. If that rock be accepted as the 

 Penrith Sandstone, it is unnecessary to assume' two series of 

 Gypseous Shales. Arguments are given to show that the evidence 

 for the existence of the St. Bees Sandstone at the bottom of the 

 Abbeytown and Bowness borings is quite inconclusive, and the 

 fact is improbable. The view adopted by the Geological Survey 

 map as the alternative to Mr. Holmes's conclusion, that the area 

 west and north-west of Carlisle consists of Keuper deposits, is also 

 improbable, the rocks thus identified' being the G} r pseous Shales 

 above the Penrith Sandstone. 



