Mr. Prestwich on Flint Implements in the Drift. 165 



Aurochs, and Lynx ; also worked flints and numerous utensils of 

 bone (of deer chiefly), such as bodkins and arrows ; the latter have 

 grooves on their barbs, probably for poison. Some of the bones 

 bear marks made of incisions by sharp instruments in flaying or cut- 

 ting up the carcases. In each cavern a chasm crosses the gallery 

 and terminates the deposits — in the upper cave at 1 00 metres, in the 

 lower one at about 7 metres from the entrance. 



The author argues that, from the facts which he has noticed, these 

 caverns must have been subjected simultaneously to the effects of a 

 great transient diluvial cataclysm coming from the N.N.W. or West, 

 in the opposite direction to the present course of the waters of that 

 region ; that man and all the other animals the remains of which 

 are buried in these caves existed in the valley before this inundation ; 

 and that the greater part of the animals inhabited the caves, but 

 that man was not contemporary with all of them. 



2, " Notes on some further Discoveries of Flint Implements in the 

 Drift; with a few suggestions for search elsewhere." By J. Prest- 

 wich, Esq., F.R.S., Treas.G.S. 



Since the author's communication to the Royal Society last year 

 on the discovery of Flint Implements in Pleistocene beds at Abbe- 

 ville, Amiens, and Hoxne, similar implements have been found in 

 some new localities in this country. 



In Suffolk, between Icklingham and Mildenhall, Mr. Warren has 

 met with some specimens in the gravel of Rampart Hill in the valley 

 of the Lark. This gravel is of later date than the Boulder-clay of 

 the neighbourhood. In Kent, Mr. Leech, Mr. Evans, and the author 

 found some specimens at the foot of the cliffs between Heme Bay 

 and the Reculvers. The author believes them to have been derived 

 from a freshwater deposit that caps the cliff, and which has been 

 found by Mr. Evans and himself to yield similar specimens at Swale 

 Cliff near Whitstable. In Bedfordshire, Mr. J. Wyatt, F.G.S., has 

 found some specimens in the gravel at Biddenham, near Bedford ; 

 this gravel also is of freshwater origin, and is younger than the 

 Boulder- clay. In Surrey, a specimen found in the gravel of Pease- 

 marsh twenty-five years ago has been brought forward by its dis- 

 coverer, Mr. Whitburn of Guildford. In Herts, Mr. Evans has found 

 a specimen in the surface-drift on the Chalk Hills near Abbots Langlcy. 

 Lastly, the author recommended that diligent search be made in the 

 gravel and brick-earth at Copford and Lexden near Colchester, at 

 Grays and Ilford in Essex, at Erith, Brentford, Taplow, Hurley, 

 Reading, Oxford, Cambridge, Chippenham, Bath, Blandford, Salis- 

 bury, Chichester, Selsea, Peasemarsh, Godalming, Croydon, Hert- 

 ford, Stamford, Orton near Peterborough, &c. 



3. "On the Corbicula (or Cyrena Jluminalis) geologically consi- 

 dered." By J. Gwyn Jeffreys, F.R.S., F.G.S. 



Mr. Jeffreys has identified the species of Corbicula, found by Mr. 

 Prestwich in a raised sea-beach at Kclsey Hill in Yorkshire, with that 

 of the Grays deposit, as well as with the recent species from the 



