﻿150 Geological Society: — 



partly to the Folkestone beds (or highest division of the Lower Green- 

 sand) and partly to the Wealden — the intermediate stages being 

 absent, although well developed where last seen on the Kentish 

 coast. The ferruginous sands, with variegated clays and iron-ore, 

 which cap the hills in the interior of the Bas-Boulonnais, were re- 

 ferred by the author to the Wealden series, as were also the pebble- 

 beds of St. Etienne and elsewhere, hitherto regarded as " drift." 



The Wealden beds were shown to rest upon the Portland around 

 Boulogne, and upon lower members of the Oolites in the west and 

 north ; while in the north-west corner they fill " pipes " in Palaeo- 

 zoic limestones. The Wealden beds, thus proved to be unconform- 

 able to those below them, were shown to underlie conformably the 

 remaining Cretaceous beds above, thinning away, however, against 

 the old ridge, where, by overlapping the Lower Greensand and finally 

 the Gault, they rest immediately upon the Palaeozoic rocks. 



The paper was illustrated by a map, showing the probable out- 

 crop of the Cretaceous rocks beneath the English Channel. 



Sir Roderick Murchison, without doubting the correctness of 

 the author's views, wished that fossil evidence had been forthcoming 

 to identify more conclusively the Wealden strata of the Boulonnais 

 with those of England, and suggested their correlation with the 

 Beauvais beds. 



The Rev. Mr. Wiltshire remarked that in Kent the Ammonites 

 mammillaris was contained in large nodules, and occurred only 

 below the lower phosphatic band. 



Mr. Whitaker, who had been with the author in the Boulonnais, 

 had been, contrary to his predilections, compelled to regard the beds 

 referred to the Wealden as belonging to that formation, and not to 

 the Lower Greensand. 



4. " Note on the Mendip Anticlinal." By C. H. Weston, Esq., 

 F.G.S. 



The author called attention to the discovery of igneous rocks in 

 the north-western portion of the Mendip Hills long previous to Mr. 

 Moore's discovery of them in the south-east ; and he stated that this 

 fact left no doubt about the persistence of this upheaving agent 

 throughout the entire anticlinal of the Old Red and Carboniferous 

 series. 



June 17th, 1868.— Prof. T. H. Huxley, LL.D., F.R.S., 



President, in the Chair. 



The following communications were read : — 



1. "On the Distribution of Stone Implements in Southern India." 

 By R. Bruce Foote, Esq., F.G.S., of the Geological Survey of India. 



The chipped stone implements of Southern India are found in, 

 or associated with, two formations — the coast-laterite, which/ is a 

 marine formation, and a freshwater deposit, occurring inland at 

 greater elevations above the sea. Most of them have been found 

 either in situ in the laterite of the eastern coast, or distributed over 

 its surface; several have been collected off the surface of older 

 rocks, in places where the laterite had been removed by denudation ; 

 others have been discovered on the surface at great elevations in 



