418 Geological Society : — 



Jukes, among others, claimed a southern derivation for those of the 

 Permian breccia, from local hill-ranges to the south. The latter 

 view accords with the fact that the pebbles composing these 

 calcareous horizons, and also the broken fragments constituting the 

 Permian breccias north of the Abberley and Lickey Hills, are coarser 

 in the south-easterly direction, and gradually become finer to the 

 north-west. 



The fragments embedded in the Middle Permian calcareous bands 

 near the Lickey are chiefly of Archaean rocks, but in all the other 

 districts described there are very few rock-fragments older than 

 Woolhope Limestone. On the other hand, pebbles of dolomitic Wen- 

 lock and Carboniferous Limestones are abundant, while Aymestry 

 Limestone, Old Bed, Carboniferous, and Lower Permian sandstones 

 occur in greater or less abundance ; and all these rocks, except the 

 Carboniferous Limestone, may be seen in situ near at hand to the 

 south. A summary of work done in the Halesowen Coal-Measure 

 conglomerates and in the Permian breccia north of the Abberley 

 and Lickey Hills is given, to bring out one of the lines of argument 

 adopted. 



(1) Ridges near the Lickey were denuded down to the Archaean 

 rocks in Upper Carboniferous time ; therefore, as might have been 

 expected, both the adjacent Upper Carboniferous conglomerate and 

 the Middle Permian calcareous cornstoues are composed of such 

 fragments of Archaean rocks as are to be found in situ there, or at 

 Nuneaton ; and the Upper Carboniferous conglomerate is also largely 

 composed of Palaeozoic rocks identical with those in situ on the 

 flanks of the Lickey. 



(2) The Middle Permian calcareous conglomerates of the other 

 districts described are for the most part made up of fragments not 

 older than the Woolhope Limestone, which were presumably derived 

 by denudation from ridges which had become more extensive. 



(3) The Lickey ridges having been denuded to the Archaean rocks 

 and the more extended area to the Woolhope Limestone, the later 

 Permian breccias are composed of Archaean fragments near the 

 Lickey, but of rocks not newer than the Woolhope Limestone in the 

 other districts north of the Abberley and Lickey Hills. 



The author has for several years called the ancient ridges from 

 which these materials were derived the ' Mercian Highlands,' and 

 claims that the Palaeozoic and Archaean rocks composing the stumps 

 of these highlands lie almost entirely buried under the Trias of 

 the Midlands south and east of the S.E. Shropshire and South 

 Staffordshire regions. 



December 21st.— W. Whitaker, B.A., F.R.S., President, 

 in the Chair. 



The following communications were read : — 



1. " On a Megalosauroid Jaw from Rhaetic Beds near Bridgend, 

 Glamorganshire.' By E. T. Newton, Esq., F.R.S., F.G.S. 



