438 THE NATURAL HISTOP.Y EETIEW. 



hand, is less jointed, and has many continuous layers of flint. The 

 beds form a very flat arch, as may be seen along the coast from 

 Kingsgate to Pegwell, between which places the flinty chalk rises up 

 from below that with few flints. It is remarkable that in this neigh- 

 bourhood the Thanet beds are conformable to the Chalk, the green- 

 coated nodular flints at the bottom of the former resting on a peculiar 

 bed of tabular flint at the top of the latter. 



3. "On the Chalk of Buckinghamshire, and on the Totternhoe 

 Stone." By W. Whitaker, Esq., B.A., P.a.S., &c.— In cariy- 

 ing on the geological survey of Buckinghamshire, the Totternhoe 

 Stone, with its underlying chalky marl, which had been sometimes 

 thought to be the representative of the Upper G-reensand, was traced 

 south-westward into a part where that formation was fairly developed, 

 and was then found to overlie it. The divisions of the Chalk in 

 Buckinghamshire are, in ascending order, — 



(1) Chalk-marl, with stony layers here and there, and at top. 



(2) The Totternhoe Stone, generally two layers of rather brownish sandy 



chalk, hard, with dark grains of small brown nodules. 



(3) Marly white chalk, without flints. 



(4) Hard-bedded white chalk without flints, forming generally a low ridge at 



the foot of the great escarpment. 



(5) The thick mass of white chalk without flints, or with a very few flints in 



the uppermost part and at top. 



(6) The " chalk-rock," already described in the Society's Journal, a thin hard 



bed or beds, with green-coated nodules. 



(7) The Chaili: with flint, the lowermost part only coming on near the top of 



the escarpment, the rest bed by bed over the table land southwards, the 

 angle of dip being rather more than that of the slope of the ground. 



4. " On the Chalk of the Isle of Wight." By W. Whitaker, 

 Esq., B.A., E.Gr.S., &c. — The chief object of this paper was to show 

 th'it here, as in Oxfordshire, &c., the division between the chalk with 

 flints and chalk without flints is marked by a peculiar bed (" chalk- 

 rock ") hard, of a cream-colour, and with irregular-shaped, green- 

 coated nodules, which may be seen in many of the pits on the 

 southern flank of the chalk-ridge, where, however, it is very thin. 

 The author disagreed with the inference that the chalk was eroded 

 before the deposition of tjie Tertiary beds, which has been drawn 

 from the irregular junction of the two in the cliff'-sections, and 

 thought that the irregularity had been caused rather by the forma- 

 tion of " pipes " after the deposition of the latter, although he did 



