NOTES AND QUERIES. 



35 



These pebble-beds are exposed in tlie open cutting at the south end of 

 the new railway tunnel, but no fossils are seen in this section. In the in- 

 terior of the tunnel, however, the lower portion of the deposit consists of a 

 fine light-coloured pebbly sand and a band of hard conglomerate, both of 

 which abound with a very fine species of Pectunculus (P. brevirostris), well 



? reserved. Together with this shell are others, some of which belong to 

 jondon Clay species, others are those of the Woolwich and Thanet sands 

 series, and several are, I am inclined to believe, undescribed. 



The following are those which I have been able to name with tolerable 

 certainty : — Ostrea Pellovacina, O. tenera, Cardium Plumsteadiense, C. 

 Laytoni, Corbula Pegulbensis, C.Arnouldii, Cyrena cuneiformis, C. cordata, 

 C. intermedia, Cytherea, ModiolaMitchellii, Pectunculus brevirostris (very 

 abundant), Area, Avicula, Nucula (new species), Cerithiwm funatum, 

 C. Boiverbankii, C. Lunnii, Calyptroea trochiformis, Auricula pygmcea, 

 Fusus latus, F. gradatus, Melania inquinata, Murex, Melanopsis bucci- 

 noides, JVatica glaucinoides, N. subdepressa, Neritina glob ula, Odostomia, 

 Pseudoliva semicostata, Pitharella PicJcmanii, Pingicula turgida, Torna- 

 tella, Trophon subnodosum, Valvata, Serpula, Lamna. To these I add, 

 with some doubt, Sanguinolaria Fdwardsii, Anomia, Fusus tuberosus, 

 Scalar ia BoioerbanJcii, Neritina concava, Eulima or Pissoa. I also add, 

 on the authority of my friend Mr. C. J. A. Meyer, Lucina, Tellina, 

 Teredo, Melania (? new species), Melanopsis ancillaroid.es, Scalaria 

 (?new species), Fusus (? new species), Turritella, Otodus. 

 My friend Mr. Bott possesses a fine specimen of Pholas from this spot. 

 A few weeks since I directed the attention of Mr. Edwards to this lo- 

 cality, and as that gentleman appears to be much interested in these 

 fossils, proper notice will doubtless be taken of any new species. 



A deposit of pebbly sand is evidently the production of water having 

 considerable transporting power. It is therefore not surprising to find, 

 that since the most abundant fossils are of marine species, those of a fresh- 

 water or estuarine character, such as Cyrena, Melania, Pitharella, etc., 

 are much waterworn. The relative position of this bed is not shown in the 

 sections now exposed, as the pebble-beds extend to the top of the hill. It 

 is, I believe, about 60 feet above the Chalk, from which fact, and also from 

 the general character of the beds, I feel inclined to place it at or near the 

 top of the Woolwich series of beds, and not far below the London Clay. 

 This is the position assigned by Mr. Prestwich to the conglomerate bed in 

 Sundridge Park. 



It will also be interesting to state that the long tunnel at Sevenoaks, on 

 the same line of railway, cuts through the JNeocomian or junction beds be- 

 tween the W eald Clay and the Kentish Rag. At the south end of the 

 tunnel clay and stone, with Cyrena, Paludina, etc., are seen in the spoil- 

 heaps around the shafts. Following the tunnel to the north (the line of 

 the dip of the beds), clays with Cerithium appear, which are succeeded by 

 more sandy beds abounding in marine fossils, ArcaRau linii, Perna 3£ulletii, 

 Corbula elegans, etc. 



Above this bed is a thick deposit of Kentish Kag and Hassock. I hope 

 on a future occasion to be able to furnish you with a list of the fossils from 

 this bed. — Yours truly, Caleb Evans. 



3, Devonshire Hill, Hampstead, 10th December, 1863. 



