Vol. 69.] PROCEEDINGS OE THE GEOLOGICAL SOCIETY. XCY 



whole region by several thousands of feet daring the Mio-Pleistocene 

 Epoch. The chart showed at a glance the submerged structure of 

 the ocean-bed and bordering coasts on both sides of the Atlantic, 

 indicating a rise of 1000 to 1200 fathoms (6000 to 7200 feet) 

 during the culminating stage of the Glacial Period. This was 

 proved by the fact that the channels of the existing rivers — such 

 as the Loire, the Adour, the Mondego, the Tagus, and the Congo — 

 were continued down to the depths above named, across ' the Con- 

 tinental Platform ' and ' the Great Declivity ' to the floor of the 

 Abyssal Ocean. The details had been worked out by means of the 

 soundings taken from the Admiralty charts and the isobathic 

 contours, the details of which are recorded, with the charts apper- 

 taining thereto, in the speaker's ' Monograph of the Sub-Oceanic 

 Physiography of the North Atlantic Ocean.' In the view of the 

 speaker this great uplift of the Northern Hemisphere was the vera 

 causa of the Glacial Period or ' The Great Ice-Age' of Prof. James 

 Geikie. 



The following communications were read : — 



1. ' On the Fossil Flora of the Pembrokeshire Portion of the 

 South Wales Coalfield.' By Reginald H. Goode, B.A. (Communi- 

 cated by Dr. E. A. Jewell Arber, M.A., E.G.S.) 



2. ' The Halesowen Sandstone Scries of the Southern End of 

 the South. Staffordshire Coalfield; and the Petrified Logs of Wood 

 found therein at Witley Colliery, Halesowen (Worcestershire). 1 

 By Henry Kay, E.G.S. With an Appendix on the Structure of 

 a New Species of Dadoxylon, by E. A. Newell Arber, M.A., Sc.D., 

 E.L.S., E.G.S. 



In addition to the exhibit described on pp. xciv-xcv, the 

 following specimens, maps, etc. were exhibited : — 



Specimens and lantern-slides of Carboniferous plants from 

 Pembrokeshire, exhibited in illustration of the paper by K. H. 

 Goode, B.A. 



Petrified logs of wood, etc. from the South Staffordshire Coalfield ; 

 also photographs, microscope-sections, and lantern-slides, exhibited 

 by Henry Kay, F.G.S., in illustration of his paper. 



Geological Survey of England & Wales : 1-inch Geological Map 

 (n. s.) Sheet 349 — Ivybridge (colour-printed), 1913. Presented by 

 the Director of H.M. Geological Survey. 



Geological Survey of Scotland : 1-inch Geological Map, Sheet 64 

 — Kingussie (colour-printed), 1913. Presented by the Director of 

 H.M. Geological Survey. 



Geological Map of Victoria : 1 inch = 16 miles, 1912. Presented 

 by the Director of the Geological Survey of that State. 



Imperial Geological Survey of Japan : 1 : 200,000 Geological 

 Map — Ichinohe, KanazaAva, Kiso, and Shichinohe, 1912. Presented 

 by the Director of that Survey. 



