88 Origin of the British Flora. 
SELSEY, SUSSEX. 
(Reid, ‘The Pleistocene Deposits of the Sussex Coast, 
and their Equivalents in Other Districts, Quart. Journ. 
Geol. Soc., Vol. XLVIIL, pp. 344-366. 1892.) 
Carbonaceous river-mud here overlies Glacial erratics 
and underlies the Paleolithic deposits. The river-mud is 
apparently of Interglacial date, and corresponds closely in 
position and fossil contents with the strata found at West 
Wittering and Stone. The plant-remains consist of drifted 
seeds, Acer monspessulanum giving a southern aspect to 
the flora :— 
Acer monspessulanum. Atriplex patula. 
Prunus Avium. Polygonum aviculare. 
Padus. Quercus Robur. 
Rubus fruticosus. Zannichellia palustris. 
Rosa. Scirpus pauciflorus (?). 
Ajuga reptans. Carex distans (?). 
SHACKLEWELL, MIDDLESEX. 
(Prestwich, ‘On a Fossiliferous Deposit in the Gravel 
at West Hackney,’ Quart. Journ. Geol. Soc., Vol. XI, 
p. 107. 1885; Reid, ‘Pleistocene Plants from Casewick, 
Shacklewell and Grays. Jé¢d. Vol LIIL., pp. 463, 464. 
1897.) 
Peaty clay is found beneath 8 or Io feet of gravel. 
Though none but British species of Mollusca or plants 
have yet been discovered, the geology suggests a con- 
siderable antiquity. The plants are Temperate species :— 
Ranunculus repens. Lycopus europeus. 
Rubus Idzus. Alnus glutinosa. 
Rosa. Quercus Robur. 
Eupatorium cannabinum. 
SIDESTRAND, NORFOLK. 
(Reid, ‘Geology of the Country around Cromer.’ 1882; 
and ‘Pliocene Deposits of Britain, Mem. Geol. Survey. 
1890.) 
