66 
Remarks on the Achatina Stewartii. 
sed, have all the appearance of a variety of earthy oxide 
of Manganese, the structure and form excepted, a dull 
black earthy appearance soiling the fingers as in the ox- 
ide of manganese. 
The different varieties of which we have spoken, and 
the. Pyroxene Augite of which we shall speak immedi- 
ately, constituted the species Augite of Werner. This 
philosopher confounded with his granular and lamellar 
Augite ( Koernger and Blattriger Jiugiie ) a substance 
which was called by Stephens, Keraphillite, and which 
Hauy has discovered to be Amphibole. 
( To he Continued. ) 
Remarks on the Achatina Stewartii. By J. Green, 
A. M. Prof, of Chem. in Jeff. Med. College. Read 
September 29th, 1828. 
On a late visit to the British Museum I had an oppor- 
tunity of examining in the vast and valuable library of 
that noble institution, the descriptions and figures of most 
of the objects in natural history collected by Freycinet in 
his voyage round the world. Among the shells brought 
from the islands in the Pacific Ocean by that enterprising 
voyager, there seems to be two or three varieties 6f the 
AcHATiNA Stewartii. These are described by Ferrus- 
sac in the work alluded to, under the names of Helix 
Lorata, H. Luteolata, and H. Vulpina. By the indul- 
gence of my friend Mr. Gray, of the Museum, I had an 
opportunity of minutely examining these shells, and I 
think them all varieties of the same species as that to 
which the A. Stewartii belongs, and all different from 
those figured on the fourth plate of the " Contributions." 
There is, therefore, no doubt with me that if the species 
of Ferrussac just noticed, are to be received, that the A. 
