280 Reports and Proceedings — Geological Society of London. 



of examples were found. The total number of species now recorded 

 by the author from the Bristol Coal-field amounts to seventy-four 

 they are as follows : Echinodermata, 1 ; Vermes, 2 ; Brachiopoda, 9 

 Pelecypoda, 25; Gasteropoda, 13; Cephalopoda, 8 ; Arthropoda, 6 

 and Pisces, 10. 



II. April 5, 1911.— Dr. C. W. Andrews, B.A., F.B.S., Vice- 

 President, in the Chair. 

 The following communications were read : — 



1. " Trilobites from the Paradoxides Beds of Comley (Shropshire)." 

 By Edgar Sterling Cobbold, F.G.S. ; with Notes on some of the 

 Associated Brachiopoda by Charles Alfred Matley, D.Sc, F.G.S. 



The author describes and illustrates the type-specimens of 

 Paradoxides Groomii, Lapworth, 1891, 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 Dorypyge allied to D. oriens, Gronwall, 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. rugulosas, 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 Cambrian. 



Davidis Fauna from the Shoot Eough Koad Beds. 

 Groomii Fauna from the Quarry Eidge Grits. 

 Lower Cambrian. 



Protolenus-Callavia Fauna from the Grey and Olenelhts 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 Stratigraphv and Tectonics of the Permian of Durham 

 (Northern Area)." By David Woolacott, D.Sc, E.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 : — 



(4) Upper red beds with salt and thin fossiliferous Magnesian Limestones 



(only exposed in the south of Durham). BOO feet. 

 (3) The Magnesian Limestone. 

 (a) Upper. 



1. Yellow bedded limestone of Eoker. 100 feet. 



2. The concretionary limestone of Fulwell and Marsden — a series of 



concretionary and non-concretionary limestones and marls. 150 to 

 250 feet. 



3. The Flexible Limestone. 10 to 12 feet. 



