Reports and Proceedings. 39 



was tlie Chillesford Clay, and showed that the gentle dip to the 

 North would bring it into the required position ; moreover, he had 

 found indurated nodules of loam, resembling weathered Chillesford 

 loam, in the base of the Norwich Crag at this locality. Mr. Fisher 

 next noticed the occurrence of the same beds at Southwold, and 

 stated that the well-known deposit from which the late Colonel 

 Alexander obtained so many mammalian remains was the Mya-bed. 

 The Norwich Crag is also seen in this neighbourhood at Wangford, 

 differing in character from the Mya-bed, and resting on a loamy 

 clay resembling, and probably identical with, the Chillesford Clay. 

 The sequence of these beds is therefore, in descending order :— (1) 

 Norwich Crag; (2) Chillesford Clay; (3) Mya-bed; (4) Ked Crag. 



The following specimens were exhibited : — A collection of Newer 

 Pliocene Fossils from Chillesford, and Aldborough, Suffolk ; exhi- 

 bited by the Kev. 0. Fisher, M.A., F.G.S. Impressions and Crystals 

 of Selenite from the Woolwich Beds and London Clay ; exhibited 

 by Dr. P. Martin Duncan, Sec. G.S. A very fine species of iej^fdoftts, 

 from the Wealden Beds at Sevenoaks ; exhibited by Arthur Bott, 

 Esq., A.A., F.G.S. Minerals from the North Highlands ; exhibited 

 by G. E. Roberts, Esq., F.G.S. Devonian Corals from Poland ; 

 presented by Sir E. I. Murchison, K.C.B., F.K.S., F.G.S. Speci- 

 mens of Cannel Coal from New South Wales j presented by the 

 Eev. W. B. Clarke, M.A,, F.G.S. 



IL — December 6, 1864, — W. J. Hamilton, Esq., President, in the 

 chair. The following communications were read : — 1. " On the 

 Western Limit of the Ehastic Beds in South Wales, and on the 

 position of the Sutton Stone." By E. B. Tawney, Esq., F.G.S. 

 With a Note on the Corals of the Sutton Stone ; by P. Martin 

 Duncan, M.B., Sec. G.S. 



Mr. Tawney commenced with a description of the Ehsetic beds 

 as they occur near Pyle station, west of Bridgend, and at Cwst y 

 Coleman, north-west of that place, giving detailed sections of the 

 beds at these localities, and showing the distribution of the fossils 

 in them. The author then describes tlie characters of the " Sutton 

 Stone," and showed its relations to the beds above and below, giving 

 to the building stones generally called "Sutton Stone" the name 

 " Sutton Series," and to the beds which intervene between the 

 Sutton Stone and the base of the true Lias, and which have hitherto 

 been considered Lias, the name of " Southerndown Series," illustra- 

 ting the stratigraphical features by a general section from Sutton to 

 Dunraven Castle, and by vertical sections at Southerndown and 

 Luleston. From the evidence yielded by the fossils, the author was 

 of opinion, that the Southerndown series belonged to the Ehsetic 

 formation, and must be separated from the Lias ; that the Sutton 

 series is somewhat older than the Avicula-contorta beds, and has 

 .af&nities with the Trias ; and that, by the discovery of Ammonites in 

 the Sutton beds, the first appearance of that genus in the British 

 area has been proved to have occurred during a period anterior to 

 the Lias. 



