PRESTWICH WOOLWICH AND READING SERIES. 109 



of the two divisions, for wherever sections are open at 60 to 80 feet 

 above the chalk we invariably find the Thanet sands capped by the 

 pebbly sands " « " of the Woolwich series, the latter being distin- 

 guished from the former through this district by its coarser quartzose 

 character, by the admixture of green sand, of small concretionary or 

 tabular iron sandstone, of an occasional thin seam of a hard siliceous 

 sandstone, and sometimes by the presence of a few pebbles ; but this 

 latter is a character which becomes less and less marked as we pro- 

 ceed eastward. These beds may be seen on the hill in the marshes 

 W. of Ottersham Wharf, on those near Newington Street, and on the 

 hills W. of Faversham. No organic remains have yet been found at 

 any of these places. 



At Boughton, three miles east of Faversham, we arrive at a range 

 of hills extending from this village to Canterbury, and the summit 

 of which consists of London clay, while round its slopes the different 

 members of the Lower Tertiaries crop out and are tolerably well ex- 

 posed. From several sections we find that the middle division or 

 " Woolwich group " has here passed entirely into light ash-coloured 

 and greenish, and ochreous sands 30 to 40 feet thick. At Boughton 

 the following section is exposed : — 



(PL I. Diag. A, Loc. sect. 40.) 



Feet. 



L. London clay -(-10 



■ b. Fine whitish sands with layers of pehbles and traces 



of shells, and a few teeth of Lamna 7 



a. Grey clay 1 



II. Light green, and ochreous, sharp sands 30 



No fossils are found in Strata " ii." Just before the publication of 

 my paper on the Thanet Sands, I discovered some silicified fossils in 

 a hedge-bank at Oakwell. The superposition of the bed is not shown, 

 and from the occurrence of the CucuUcBa crassatma* and Cytherea 

 Bellovacina, I considered that it was probably a part of the Thanet 

 Sands. From subsequent examination of the ground I am, however, 

 led to believe that this bed belongs to the pebbly Woolwich sands 

 ("a"), the more especially as I have since foimd similar fossils in a 

 bed whose superposition to the Thanet Sands is clear. This is the 

 first indication we have of a distinctly marine fauna in this part of 

 the Woolwich group. The following are the species found there : — 



Cardium. Ostrea. 



Corbula Regulbiensis, Mor. ? Flustra. 



(Arnouldi, Nyst ?) Sponge spicula. 



Cucullaea crassatina, Lam. Nodosaria bacillun?, Defr. 



Cyprina Morrisii, Sow. A very small undeterminable univalve, 

 Cytherea Bellovacina, Desh. and some small bivalves, apparently 



Dentalium. Cytherea. 



* The occurrence of this silicified shell in this neighbourhood was noticed 

 some years since by Mr. Crowe of Faversham, and is mentioned in the ' Min. 

 Conch.' ; but the exact locality was not given, and its position has remained un- 

 certain up to the present time. It appears to have been found nearer to Faver- 

 sham, or there were formerly some excavations in Nash Park near Boughton 

 whence some fossils are said to have been obtained. 



