ON THE FOSSIL PLANTS OF THE TERTIARY AND SECONDARY BEDS. 247 



which occurs below the great mass of mottled clay, whilst these lie above 

 it aa shown in the accompanying sections. The plants show in the mam 

 as might be anticipated, an approach to the Alum Bay flora, which is still 



higher and above the London 

 Clay; but whether these leaves 

 are connected in any closer degree 

 with the fruits of Sheppey than 

 are those from Woolwich, Croy- 

 don, or Bromley is a question 

 which we have not as yet the data 



V7" 



Fig. 2. — Section at Katgsgrove, Reading. 



London Clay. — a. Unctuous laminated clay, 

 whitish, slightly mottled orange with well-defined 

 base. There is only about 3 feet exposed here, 

 but it becomes very fossiliferous nearer Reading, 

 containing Ostrea, Pertunculus, Cylhena, A'atica, 

 Valuta, &c. 



Reading Beds. — b. Stiff clay, mottled slate and 

 chocolate colours, 3 feet. c. The same with the 

 addition of crimson, 10 feet. d. Dark greenish- 

 grey clay, about 8 inches, e. Stiff clay, mottled 

 bright pink and drab, 1 foot 6 inches. /. Same 

 as d, 2J inches, g. Ditto of dark crimson colour, 

 about 18 inches. A. Yellow and drab mottled 

 clay with traces of red, 3 feet. i. Clayey sand, 

 warm grey colour, about 9 inches, j. Ditto, of 

 greenish yellow passing into buff sand, becoming 

 mottled greenish at base, about 4 feet exposed. 

 The leaf bed is a little below this. 



for answering. There are, at all events, no remains of Palms among 

 them, and this, so far as it goes, is against the connection ; but on the 



' This in places is dovetailed into the sand, which sometimes thins considerably, 

 though the mottled clay never rests directly on the Thanet beds. 



Fig. 3. — Section at Coley Hill, Reading, 



Reading Beds. — a. Mottled clay.' b. Current- 

 bedded sand, white to buff, with occasional galls 

 and lenticular patches of clay, in some of which 

 indistinct willow-like leaves occur. 



Thanet Beds.—c. Clayey sand, greenish in colour, 

 with layer of irony concretions, 4 feet. d. Dark 

 slate-coloured clay, piped with ochreous sand, 

 1 foot 7 inches, e. The oyster bed, at first stiff 

 dark clay with strong line of oysters, and sub- 

 angular pebbles, then the same clay with bore- 

 holes of green sand, becoming sandy at base with 

 green-coated flints. 



