228 
HEATHFIELD STRATA. 
bed abounds in organic remains, and particularly 
in ferns of a very large size, but exceedingly im- 
perfect. Large unioned also occur. Some por- 
tions of this layer are entirely composed of casts of 
paludincp. elongatcB, the shells having disappeared : 
these masses are very ferruginous. Traces of lig- 
nite are disseminated throufirhout the beds. 
O 
The fossil plants of this quarry are highly inter- 
esting ; the stems are generally carbonized, and the 
fronds wanting ; but the cavities made by their 
impressions are filled up with hydrate of alumine, 
like the plants in the ironstone of Yorkshire and 
Staffordshire. I have observed the same kind of 
ferrugino-argillaceous sandstone near Forest Row, 
and Tilgate Manor-Iiouse near Crawley. 
Lansdown Quarry near Heathfield. — No cal- 
ciferous sandstone is here worked ; and in the blue 
shale, which alternates with it, ribs and portions of 
the sternal plates of freshwater turtles, and bones 
of reptiles have been observed. 
In Kingsdown Quarry ^ in the same parish, grit, 
with lignite and ferns, occur. 
A shelly limestone that alternates with blue 
clay and shale, at Eason’s Green, in the parish of 
Framfield, appears to belong to this series ; and a 
very beautiful compact variety is dug up in Bar- 
net’s Wood, adjoining the ninth milestone, on the 
turnpike road, leading from Lewes to the Black- 
boy’s public house ; this limestone is strongly im- 
[)regnated with iron, and traversed by veins of 
white calcareous spar ; the bivalves are the cyclas 
parra. The same beds occur at Rotherfield. 
We have not observed the Ashburnham lime- 
