217 



he states that it very much resembles certain varieties of the younger 

 Alpine limestone. 



Unconformably deposited on this and other older rocks, within 

 a district the average diameter of which is about thirty-five 

 miles, there are spread out formations of considerable thick- 

 ness, the organic remains of which are exclusively lacustrine 

 and tertiary. These in the immediate neighbourhood of Baza are 

 divided into two principal groups ; the lowest, consisting of marls 

 with laminated gypsum, sulphur and brine springs, is zoologically 

 distinguished by the presence of Cypris ; the uppermost is a com- 

 pact, cream-coloured limestone, charged with many small Paludinae 

 of a species identical with one which is found in the lacustrine for- 

 mations of Central France. The united thickness of these fresh- 

 water groups in the neighbourhood of Baza cannot be estimated at 

 less than 300 and 400 feet; they are generally horizontal, but the 

 face of the country everywhere exhibits striking proofs of immense 

 degradation, the gypsiferous marls being denuded throughout the 

 greater part of the centre of the basin, and but rarely exhibiting* 

 caps of the compact paludina-limestone. On the southern, 

 eastern, and south-western flanks of the basin, particularly near 

 Gaudix, there are vast accumulations of pebble beds, conglomerate, 

 &c, the exact relations of which to the marls and limestone the 

 author could not satisfactorily determine, owing to the obscurity of 

 the sections ; although he is of opinion that there are conglomerates 

 which in some places pass under the marls, whilst in others they 

 are decidedly overlying. 



The reading of the Tetter on the Basin of Alhama was deferred 

 until another evening. 



April 2nd.— William Hallows Miller, Esq., M.A., of St. John's 

 College, Cambridge ; Lloyd Baker, jun., Esq., of Hardwick, Glou- 

 cestershire ; William Granville Eliot, Esq., Lieut. -Col. of the 

 Royal Artillery, Hastings ; Rev. Henry Engleheart, of Caius Col- 

 lege Cambridge, and Seal, Kent ; Josias Lambert, Esq., of Liver- 

 pool Street, London; and Thomas Morgan, Esq., of Thames Ditton, 

 Middlesex, — were elected Fellows of* this Society. 



The reading of a paper on the Geology of Weymouth, and the 

 adjacent parts of the coast of Dorsetshire, by the Rev. William 

 Buckland, D.D., F.G.S., F.R.S. &c, and Henry Thomas De la 

 Beche, Esq., F.G.S., F.R.S. &c, was begun. 



April 16th. — John Rennie, Esq., of 15, Whitehall Place; George 

 Rennie, Esq., of 21, Whitehall Place; Alfred Thomas, Esq., of 

 Haverfordwest, Pembrokeshire ; Charles Mundy, jun., Esq., of 

 Burton Hall, Loughborough ; and Alexander Turnbull Christie, 

 M.D., of the East India Medical Service, — were elected Fellows of 

 this Society. 



The reading of a paper on the Geology of Weymouth, and the 

 adjacent parts of the coast of Dorsetshire, by the Rev. Dr. Buck- 

 land, and Henry Thomas De la Beche, Esq., begun at the last 

 Meeting, was concluded. 



