Geological Society. 679 



PllOCEEDIXGS OF LEARNED SOCIETIES. 

 GEOLOGICAL SOCIETY. 



April 5th, 1911.— Dr. C. W. Andrews, B.A., F.R.S., 



Vice-President, in the Chair. 



The following communications were read : — 



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

 Bhire).' By Edgar Sterling Cobbold, F.G.S. (with JS'otes on some 

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

 F.G.S.). 



The Author describes and illustrates the tj-pe-speeiraens of 

 Paradoxides groomii Lapworth, 1S91, 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 Paradoxides, 

 represented by fragments insufficient for specific determination ; 

 also a species of Doryj)y<ie, allied to D. oriens Grrbnwall, and one of 

 Conocoryphe allied to C emarginata Linnarsson. He also describes 

 some of the trilobites from a higher horizon containing Paradoxides 

 davidis Salter and P. rugulosus 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 given, arranged under the following provisional 

 faunal groups :— 



Middle Cambkian. 



Davidis Fauna from the Shoot Rough Road Beds, 

 Groomii Fauna from the Quarry Ridge Grrits. 



Lower Cambrian, 



Profoletms-Callavia 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 Cambrian beds of the locality : arguing from the 

 analogy afforded by American deposits that, if the Olenelli 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 Durham 

 (Northern Area).^ By David Woolacott, D.Sc, F.G.S. 



The Permian strata of Durham and Northumberland lie uncon- 

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

 follows : — 



