Geological Society. 679 



rilUt'EEDINCiS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



April .jtli, 1911.— Dr. C. W. Andrews, 13.A., F.R.S., 

 Vice-rresidcut, in the Chair. 



The followiug communications were read : — 



1. ' Trilobites from the Paradoxides Beds of Comley (Shrop- 

 shire).' By Edgar Sterling Cobbold, F.G.S. (with 2sotes on some 

 of the Associated Brachiopoda by Charles Alfred MaLley, D.Sc, 

 F.U.S.). 



The Author describes and illustrates the type-specimens of 

 I\inido.vi<les (jroomii Lapworth, l^Ul, and the associated trilobites 

 from the basement beds of the Middle Cambrian of Comley Quarry. 

 Among the latter there are two or three other species of Paradox ides, 

 represented by fragments insulhcient for specific determination ; 

 also a species of Dorypnije, allied to D. oriens Gronwall, and one of 

 Conocort/phe allied to U. e^nurrjlnata Linnarsson. He also describes 

 some of the trilobites from a higher horizon containing Pa?-afZoa-ntZfs 

 davidis Salter and P. rwjuhstis Corda; and notes on the brachiopoda 

 from this horizon are contributed by Dr. Matley. 



A complete list of the trilobites hitherto identified from the local 

 Cambrian deposits is giveu, arranged under the following provisional 

 faunal groups : — 



Middle Cambrian. 



i)«j7'c//s Fauna from the Shoot Rougli Road Beds. 

 G?"o(;»in" Fauna from the Quarry Ridge Grits. 



Lower Cambrian. 



Protolenus-Callnria. Fauna from the Grey and Olenellus 

 Limestones. 



The Author draws attention to the great divergence between the 

 two last-named faunas, and also describes the recently exposed 

 evidence of the accompanying physical break between the Middle 

 and the Lower Cambrinn beds of the locality : arguing from the 

 analogy afforded by American deposits that, if the OleneUi with 

 telson-like pygidia were ever present in Shropshire, their place 

 in the local series would be among the strata cut out by the 

 unconformity. 



2. ' The Stratigraphy and Tectonics of the Permian of Duiham 

 (Northern AreaV By David AVoolacott, D.Sc, F.G.S. 



The Permian strata of Durham and Northumberland lie uncou- 

 formably on a basin of the Coal Measures. They can be divided as 

 follows : — 



