504 Zoological Proceedings of Societies. 



iVor/17. A notice was read, On some beds associated with 

 the magnesian limestone^ and on some fossil fish found in them ; 

 by the Rev. A. Sedgwick, Woodwardian Professor, F.R.S. F.G.S. 



Among the beds described in this communication is a deposit, 

 consisting, in some places, of shell-limestone, alternating with va- 

 riously-coloured marl, and in other places of thin-bedded, nearly 

 compact limestone, alternating with bituminous marls. In the 

 county of Durham, this deposit is associated with an extensive 

 formation of marl-slate. In this marl-slate many specimens of 

 fish have been discovered ; some of which appear to be identical 

 in species with the fish in the marl-slate of Thuringia. In the 

 same deposit have also been found many vegetable impressions. 



A paper was also read, entitled, Observations on the bones of 

 Uycpnas and other animals^ in tke cavern of Lunel, near Mont- 

 pelier, and in the adjacent strata of marine formation^ by the 

 Rev. W. Buckland, D.D., Professor of Mineralogy and Geology, 

 in the University of Oxford. 



Jan. 5, 1827. — A Notice was read, accompanying some speci« 

 mens from the Hastings-Sand Formation, with a copy of a work 

 on the Fossils of Tilgate Forest ; by G. Mantell, Esq. F.R., L. 

 and G. S., — in a letter to R. I. Murchison, Esq. Sec. G.S. 



The authour states, that his principal object in the present vo- 

 lume, is to give a correct and extended view of that division of the 

 Hastings-Sands, distinguished by him in the strata of Tilgate Forest, 

 the relations of which he illustrates by the section of a quarry at 

 Pounceford, where the Ashburnham limestone with bivalves, &c. 

 is seen overlying sandstone and calciferous grit (Tilgate-stone). 



A recapitulation of the animal and vegetable remains (in which 

 the authour particularly notices that gigantic Saurian the Iguano- 

 don), shows the vast preponderance of land and freshwater exuvias 

 in the Hastings strata over those of marine origin ; a circumstance 

 in strict accordance with what is now constantly occurring in all 

 deltas and estuaries of great rivers. A description is given in the 

 concluding chapter of the work, of the probable condition of the 

 country anterior to the epoch of this deposit. 



Feb. 16. At the Annual General Meeting this day, the Society 



