lly 
PAB, CCL xX. 
Red Stilbite. 
Onz sort of Red Zeolite, as it is commonly called, seems 
a curious variety of Stilbite; but I do not know that it has 
been recognised as such by any author on British fossils : 
indeed it is considered as very rare. The peculiar laminated 
form it assumes distinguishes it from the Zeolites in ge- 
neral, and gives the radii a very different appearance, as 
they lie over each other, resembling, in some measure, the 
flyers of a ventilator. The mica-like lustre of the sub- 
stance gives the reddish orange a peculiar pleasant cast, 
although nearly void of transparency. 
Since my figure has been finished, I have been favoured 
with a fine specimen, by the Earl of Seaforth, which 
distinctly shows the form of the crystals to be similar to 
the last. 
It is found (like most of the substances usually de- 
nominated Zeolite) lining and almost filling the hollows 
in a coarse kind of Trap, mixed with Carbonate of Lime, 
which fills the remainder of the hollows, and is peculiar for 
having striz upon the long diagonals of the primitive or 
fractured faces. 
The specimen figured came from Hall Hill, Kincardine- 
shire. 
