Geological Societij. 297 



of the rocks which are found in situ on the confines of Wales 

 and Shropshire, in order to show that from the disintegration 

 of these rocks, the clay, sand and gravel, of the red marl Ibrma- 

 tion have for the most part been derived. Tlie first line of 

 section which is particularly considered is near the river Dee 

 and Vale Crucis; the second, a line drawn from Oswestry 

 westward to Llansilen, which crosses within the space of five 

 miles the basset edges of all the strata from the new red sand- 

 stone to the slate. The author then takes a view of the rocks 

 occurring in the direction of the road from Welchpool to 

 Ludlow. The fourth district then noticeil is the vicinity of 

 Church Stretton. Mr. Yates then mentions some particulars 

 of the rock near Bewdley and in the Clent Hills, and the 

 neighbourhood of Dudley, and adds 5ome remarks on the 

 Bromsgrove Lickey, as supplementary to Professor Buckland's 

 paper in the 5th volume of the Societj-'s Transactions. 



The range of hills is also described which extends from 

 N.W. to S.E. beside the course of the Coventry canal and the 

 river Anker ; and lastly, a district in Leicestershire, a few miles 

 E. from Hinckley, consisting of a coarse-grained ci-ystalline 

 greenstone. 



The author then proceeds to show how the strata belonging 

 to the older formations which he has described, may be viewed 

 in connexion with the general physical structure of England ; 

 and then points out from what various sources the beds of sand, 

 clay and gravel, of the red marl formation, as well as the su^ier- 

 ficial debris which is sti'ewed over the midland districts of 

 England, may have originated. Mr. Yates concludes with 

 some reniiirks on the excavation of valleys, and on some opi- 

 nions on that subject now generally received among English 

 geologists from which he is inclined to differ. 



April 15. — A paper was read entitled, "On a new species of 

 Gyrogonite from the lower fresh-water formation atWhiteclift- 

 bay in the Isle of Wight, with sonic account of the strata in 

 which it occurs ;" by Charles Lyell, Esij. Sec. G.S. 



Mr. Lyell cfescribcs this species of gyrogonite as ver}' dis- 

 tinct from the three sj)ecies which have l)een found in France. 

 The spiral valves form nine rings, each of which are orna- 

 mented with a row of tubercles ; from which he has given it 

 the name of Cliara lubcrcidafa. An account is given of the 

 strata of the lower fresh-water formation at Whiteclifl-bay in 

 the Isle of Wight, in which this gyrogonite occurs very abun- 

 dantly. They consist of beds ol" compact limestone alternating 

 with whitish calcareous marls, and in most of them the casts 

 or shells of various fresh-water univalves are common. 



(iyntgonites appear not to have been noticed belbrc in ihe 

 Vol.'fj.-,, No. 321. ///'/// 1»25. Pp fresh 



