48 JReporis and Proceedings — Geological Society of London. 



Catesby to Rugby is described ; as the ground falls while the strata 

 rise in this direction, quite low beds in the Lower Lias are met 

 ■with near Rugby. The lowest zone exposed is that of Ammonites 

 semicostatiis, in the lower part of which, and in Boulder-clay derived 

 from it, A. Turneri has been found. The next succeeding zone, that 

 of A. obtnsus, although for the most part barren, yielded the 

 characteristic fossils at its base. The oxynotiiS'Zone is well developed 

 and well displayed, besides being richly fossiliferous. The zone of 

 A. raricostatus merges into that of A. oxynotus below and that of 

 A. armatus above, and is not more than three or four feet thick. 

 The armatns-zone, beds between that and the Jamesoni-zone, and 

 the Jamesoni-zone itself follow ; the middle beds of the latter being 

 rich in Bhynchonella and A. pettus, the name of this ammonite is 

 attached to the zone beai-ing them. The Ibex-zone occurs east of 

 Plecknoe, covered by rocks yielding A. Henleyi ; and the highest 

 beds of this cutting appear to belong to the capricornns-zone. 

 Lists of the characteristic fossils of each zone are given, followed 

 by a complete list of all those found in the Lower and Middle Lias 

 of the cuttings, with a statement of their distribution. 



The glacial deposits are described under the following headings : 

 Blue or local Boulder-clay, brown and grey contorted Boulder-clay, 

 Chalky Lower Boulder-clay, (Mid-Glacial) sands and gravels, and 

 red Upper Boulder-clay. 



The paper is accompanied by a measured section along the railway. 



3. " On the Remains of Amia from Oligocene Strata in the Isle of 

 Wight." By E. T. Newton, Esq., F.R.S., F.G.S. 



The specimens described in this communication were found by 

 Mr. Clement Reid in the Berabridge Marls of Hamstead, and by 

 Mr. Colenutt in the Bembridge Beds and in the Osborne Series of 

 King's Quay, near Ryde. After a reference to species described in 

 America and referred to the genera Amia, Protamia, Hypamia, and 

 Pappichthys, the author proceeds to the description of the specimens 

 in question, referring them all to the genus Amia. The specimens 

 include the following bones : vertebrae, maxillee with the supple- 

 mentary bones, premaxillee, bones of the skull, dentary bones, 

 a parasphenoid, a clavicle, scales, and teeth. They are referred 

 to two new species of the genus Amia. The paper concludes with 

 a table of all the species hitherto recorded from America and Europe. 



IL— December 7, 1898.— W. Whitaker, B.A., F.R.S., President, 

 in the Chair. The following communications were read : — 



1. "The Geological Structure of the Southern Malverns and 

 of the adjacent District to the West." By Prof. T. T. Groom, 

 M.A., D.Sc, F.G.S. 



The Raggedstone and Midsummer Hills, consisting essentially of 

 massive gneissic and schistose rocks, are traversed by a curved 

 depression which marks a line of profound dislocation, probably of 

 the nature of a thrust-plane. This appears to dip towards the east, 

 though with a relatively small hade. Along this depression occur 

 strips af Cambrian and Silurian strata embedded in the Archo3an 



