564 Report and Proceedings — Geological Society of London. 



as determined by Prof. T. Eiipert Jones. The find was perhaps the 

 more interesting because the specimens were obtained from a quarry- 

 by the road-side in the village of Miirren, and actually between the 

 two principal hotels. 



Mr. Etheridge referred to the position of the Orbitoidal limestones 

 on the slope of the Miirrenberg, and stated that Prof. Eupert Jones 

 had examined and named the Foraminifera, etc., contained in the 

 several specimens collected by Sir John Lubbock and himself at 

 Miirren. 



The following communications were read : — 



1. "Notes on some recent sections in the Malvern Hills." By 

 Prof. A. H. Green, M.A., F.R.S., F.G.S. 



The sections described occur on the east side of the Herefordshire 

 Beacon, and for convenience are named the Warren House Eocks. 

 They are bedded, and have a general north-and-south strike. The 

 great bulk of the rocks are hard, close-grained, and splintery, and 

 are largely altered, and in many cases thickly veined with calcite. 

 Details of their structure are given ; and the author states that he 

 is inclined to regard them as a group of bedded acid lavas and tufi's, 

 crossed by three bands of dolerite. What little balance of evidence 

 there is seems to be in favour of the intrusive character of the 

 dolerites. No true limestones have been found, and the only very 

 calcareous rock seen is regarded as a rock belonging to the volcanic 

 group which has been largely calcified. 



Somewhat similar rocks are found on the southern part of Eagged- 

 stone Hill, and a shattered felstone occurs forming an isolated boss 

 south of Chase End Hill. 



Several hypotheses present themselves as to the relationship 

 between the Warren House Eocks and the crystalline schists. 

 The former may be distinct from the latter, in which case the 

 absence of mechanical deformation would indicate that they are 

 younger. If we consider that the Malvern Schists have been formed 

 out of volcanic rocks by dynamic metamorphism, the Eagged-stone 

 Hill Eocks may be a portion of the volcanic complex which has 

 undergone only partial transformation, whilst the Warren House 

 Eocks have altogether escaped metamorphism, the crystalline schists 

 representing its final stages. 



2. " The Denbighshire Series of South Denbighshire." By Philip 

 Lake, Esq., M.A., F.G.S. 



The area to which this paper chiefly refers is the south-western 

 quarter of the Llangollen basin of Silurian rocks. The beds are 

 here very little disturbed, and the sequence is readily made out. 

 The following subdivisions are recognized (in descending order) : — 



Leintwardinensis Slates ; with Monograptus Leintwardinensis. 

 Upper gritty beds ; with no fossils known. 

 Nantglyn Flags ; with M. colonus, Cardiola, etc. 

 Moel Ferna Slates ; with M. priodon, M. Flemingii. 

 Pen-y-giog Grit. 



Pen-y-glog Slate ; with M. personatus, M. priodon, Betiolites 

 Geinitzianus, etc. 



