OF TILGATE FOREST. 
243 
Ijouchopterix il laniclh. 
This beautiful hlicite “ approaches in habit to 
some of the tropical Nephrodia ; but the ramifi- 
cations and interlacing of the veins, at the tips of 
the pinna?, are peculiar, and serve to distinguish it 
from other species ; ” * a magnified view of this 
structure is shown PI. I. fig. 3. There is a plant 
in the coal shales which has reticulated leaves, but 
the form and size of the pinna? are altogether dif- 
ferent. This fern is found in the Worth sands, 
both in the Forest, and in the cliffs at Hastings ; 
and in the shales and clays of Tilgate Forest ; it 
has but rarely been noticed in the harder strata ; 
it always occurs in a carbonized state. It was 
described by Messrs. Stokes and Webb, under the 
* Gcolog. Trans, vol. i. new series, p. 423. 
R 2 
