•332 Heporfs and Proceedings- — 



regularly stratified, and characteristic Eh^tic fossils have been 

 obtained from them by Mr. Sanford. 



(2) The microscopical details of the various clay-washings are 

 given, and the great abundance of some forms of the acervuline 

 foraminifer Stacheia is noticed, included amongst which are forms 

 that have been previously desci'ibed under the name of " Psammo- 

 siphon" by Vine, and "Plaques de Rayonnes" and " Asteracanthion" 

 by MM. Terquem and Berthelin ; the former occurring in Silurian 

 strata, and the latter in the Lias. The Ebastic examples of the 

 genus Stacheia have numerous aggregated crystals of zeolites (?), of 

 which, however, only impressions remain, included in the material 

 of the tests. 



(3) In a comparison made with the foraminiferal faunae of the older 

 and younger rocks respectively, the Rh^tic fauna shows marked 

 affinities with both the Upper Palaeozoic and the Liassic facies. 



The bathymetrical aspect of the foraminifera from Wedmore is, 

 generally speaking, that of a shallow-water deposit. The genus 

 Stacheia is represented so abundantly in some of these Rhgetic rocks 

 that the fossils constitute distinct layers in the beds ot clay in 

 which they ai-e found. Stacheia appears to resemble Polytrema in 

 reference to its habitat, and also in the microscopical structure of 

 its test, with the exception that Stacheia includes in the test-wall 

 minute sand-grains and other foreign material. 



(4) Twenty-six species of foraminifera, chiefly of arenaceous types, 

 are described, nine of which are new forms, viz. : Eaplophragmitim 

 Bhcsticum, Ammodiscus nuriculus, A. fusiformis,Nodosinella Wedmori- 

 evsis, Stacheia intermedia, S. triradiata, S. dispansa, S. cuspidata, and 

 Truncatulina stelligera. 



II.— June 5, 1895.— W. H. Hndleston, Esq., M.A., F.R.S., F.L.S., 

 Vice-President, in the Chair. The following communications were 

 read : — 



1. " On a well-marked Horizon of Radiolarian Rocks in the 

 Lower Culm Measures of Devon, Cornwall, and West Somerset." 

 By George Jennings Hinde, Ph.D., F.G.S., and Howard Fox, Esq., 

 F.G.S. 



In the Lower Culm Measures the basal Posidonomya Beds and the 

 Waddon Barton Beds with Goniatites spiralis consist of fine shales 

 with thin limestones, and above these are the beds which form the 

 subject of the present paper. The Upper Culm Measures consist of 

 conglomerates, grits, sandstones, and shales, with occasional beds of 

 culm. There is evidence of the partial denudation of the Radiolarian 

 rocks during the accumulation of the Upper Culm Beds, as indicated 

 by the presence of pebbles of the former in the latter. 



The Radiolarian Beds consist of a series of organic siliceous 

 rocks — some of a very hard cherty character, others platy, and yet 

 others of soft incoherent shales. They are spoken of as the Codden 

 Hill Beds — a name applied to them by previous writers, though the 

 authors do not include in this series all the beds which have been 

 referred to it by others. The term " Grits," which has been used in 



