199 
TAB. CCC. 
FERRUM.  sulphureum. 
Sulphuret of Iron, or Iron Pyrites. 
Dw. 2. Imitative. 
Aone other geological formations, perhaps, that are 
least noticed in works of this kind up to the present time, 
are those of fruits that are preserved in a Carbonaceous 
Pyrites, if I may so term the substance in which the Car- 
bon, or remains of the Wood, is more or less incorporated 
with the Pyrites which has chiefly taken place of the 
Wood, like some parts of the left hand upper Jig. &e. 
The present specimens are from the cliffs of Sheppy 
Island, near Minster (whence the Sulphate of Barytes, 
commonly called Lepastrum—see tabs. 172, 173*). 
Many of these fruits fall to pieces from a certain excess 
of moisture which acts occasionally on this combination, 
by which many valuable specimens are lost from time to 
time. I was therefore glad to figure some while in a proper 
state. 
The upper left hand figure represents a nearly round, 
semi-spined fruit with a flattish sulcus on one side. It is 
enclosed in a shell which is partly indented inwardly, op- 
posite the spines. It is thick and irregular on the outside, 
and does not agree with any fruit now known. 
The upper middle figure is a five-valved capsule. 
The upper right hand figure is not much unlike the cap- 
sule of Thea viridis, but is less regular: nor does it agree 
* I said, when those figures were done, that they were not found anywhere 
else ; but I have since gathered them from the opposite cliffs at Southend, 
and have found small specimens at Sydenham in the Croydon canal. 
