666 Geological Society :— 
June 8th.—J. E. Marr, Sc.D., F.R.S., President, 
in the Chair. 
The following communications were read :— 
1. «The Paleontological Sequence in the Carboniferous Lime- 
stone of the Bristol Area.’ By Arthur Vaughan, Esq., B.A., B.Se., 
F.G.8. 
2. ¢On a small Plesiosaurus-Skeleton from the White Lias of 
Westbury-on-Severn.’ By Wintour Frederick Gwinnell, Esq., F.G.S. 
3. ‘The Evidence for a Non-Sequence between the Keuper and 
Rheetic Series in North-West Gloucestershire and Worcestershire.’ 
By Linsdall Richardson, Esq., F.G.S. 
The section at Wainlode Cliff shows a transition in the ‘ Bone- 
Bed,’ from a thin pyritic stratum of an inch or so in thickness and 
crowded with fish-remains, to a micaceous sandstone-bed, usually 
devoid of such remains and about a foot thick, but containing Strick- 
land’s Pullastra arenicola. This sandstone is seen in many Worcester- 
shire sections, and may be called the ‘ bone-bed-equivalent.’ Thus 
as the bed which is full of vertebrate remains, or the Bone-Bed 
(Bed 15 of the author’s sections), can be traced in a single section 
laterally into a sandstone-bed devoid of those remains, the contem- 
poraneity of the two developments is considered satisfactorily 
established. Particular stress is laid upon the fact that above this 
main ‘ Bone-Bed’ the component deposits of the Rheetic are remark- 
ably persistent, while below it such persistency is not found. Black 
shales are generally present below the Bone-Bed or its equivalent in 
Worcestershire, but in places there comes in a sandstone between 
them and the ‘ Tea-Green Marls.’ At Dunhampstead the Rheetic 
rocks are thicker than at any other locality in Worcestershire. At 
Denny Hill, near Gloucester, the ‘ Bone-Bed’ rests directly on the 
‘Tea-Green Marls’; there is no infra-Bone-Bed deposit of Rheetic 
date. At Garden Cliff, however, a comparatively thick accumulation 
is seen in that position. The anticlinal and synclinal areas esta- 
blished in the Mid- and North Cotteswolds by Mr. 8.8. Buck- 
man are referred to; and it is found that the greatest thicknesses 
of the Rheetic rocks under the Bone-Bed coincide with synclines, and 
the least thicknesses with anticlines. The Moreton and Birdlip 
anticlines are especially mentioned, as also the syncline of Cleeve 
Hill and that between Painswick and Stroud. Thus Dunhampstead, 
where the Rheetic deposits below the *‘ Bone-Bed’ are thicker than 
anywhere else in Worcestershire, is situated on a continuation of the 
Cleeve-Hill synclinal axis ; Denny Hill, where the ‘ Bone-Bed’ rests 
directly upon the ‘ Tea-Green Marls,’ is near the westward con- 
tinuation of the Birdlip anticline ; and Garden Cliff, where the infra- 
Bone-Bed deposit is thickest, is situated on a continuation of the 
synclinal axis which runs near Painswick. Thus the earth-pressures 
recognized in later times were probably at work at the close of the 
Keuper Period. As the area, once covered by the waters of the 
Keuper sea and the diminished representatives of that sea in the 
form of lakes, gradually sank, the Rhetic ocean slowly encroached 
