[ 72 ] 



X. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from vol. x. p. 449.] 



December 1, 18S0. — Robert Etheridge, Esq., F.B.S., President, 

 in the Chair. 



T 



HE following communications were read : — 



1. "On Remains of a small Lizard from the Neocomian Rocks 

 of the Island of Lesina, Dalmatia, preserved in the Geological 

 Museum of the University of Vienna." By Prof. H. G. Seeley, 

 F.R.S., F.G.S. 



2. " On the Beds at Headon Hill and Colwell Bay in the Isle 

 of Wight." By Messrs. H. Keeping and E. B. Tawney, M.A., 

 F.G.S. 



The authors criticised the views put forward by Prof. Judd in his 

 paper published in the Q,. J. G. S. xxxvi. p. 13, and supported those 

 established by the late E. Eorbes and the publications of the Geolo- 

 gical Survey. At the west end of the island, viz. at Totland and 

 Colwell Ba}^s, the authors stated that there is only one marine 

 series, the Middle Headon, which they traced continuously through 

 the cliffs — identifying it bed by bed at various points — the result 

 entirely corroborating the sections of the Geological Survey. The 

 section at the N.E. end of Headou Hill was described in detail, and 

 Prof. Judd's interpretation of this part of the section analyzed. 

 Prof. Judd places the marine Middle Headon at this point at the level 

 of the sea, maintaining that 250 feet (the altitude of the Bembridge 

 limestone-quarry) of beds intervene between the Bembridge lime- 

 stone and the sea-level. The authors maintained that the top of the 

 marine series is about 105 feet above the sea-level, that thickness 

 of beds intercalated above the Middle Headon having no existence 

 in fact, also that the Brockenhurst bed does not exist below the 

 Bembridge quarry, where it is supposed to be (concealed by gravel) 

 by Prof. Judd, and stated that there is no gravel at that spot 

 to conceal any thing, and that the beds which do exist there are the 

 freshwater Osborne and Upper Headon beds as described by E. 

 Forbes. They then adduced fossil evidence confirmatory of the 

 stratigraphical ; thus out of 57 species collected this summer at 

 Colwell Bay they found 53 at Headon Hill. (2) The sections at 

 Whitecliff Bay and the New Forest (Brockenhurst) were next 

 described. At Whitecliff Bay the 90 feet of beds which constitute the 

 Middle Headon of the Survey section have been renamed " Brocken- 

 hurst series " by Prof. Judd. The authors maintained that the Broc- 

 kenhurst bed, identical as to its fossils and position with that of the 

 Whitley Ridge cutting, is represented by the lower 2 feet only, imme- 

 diately above the freshwater Lower Headon. The Middle Headon at 

 Whitecliff Bay contains lower zones than any developed in the Middle 



