of the Land and Fresh-water Shells of Suffolk. 153 
A distinct species, sent to me by Dr. Leach under the specific 
name of ventricosa. As, however, I have a curious shell very 
nearly allied to the Clausilia ventricosa of Draparnaud, and 
which may possibly be a variety of that species, (in which case it 
must be called T'urbo ventricosus,) I have honoured this shell with 
the name of that distinguished naturalist Dr. Leach, to whose 
friendship I am indebted for the possession of many curious spe- 
cies and much valuable information. 
Found sparingly in Campsey Mere, and Holbrook stream and 
mill-pond. | 
This species bears a great resemblance to the young of Helix 
fossaria ; and being an operculated shell, it has probably been 
confounded with the young of T. tentaculatus. 
17. TurBo LAMINATUS. Trans. Linn. Soc. vol. viii. p. 119. 
In moss upon the trunks of trees, and under the bark of, and 
upon, dead branches which have lain long upon the ground. 
In Middlewood Offton ; and in Great kon and Friston 
woods. 
=- I have a variety from Friston -— in slih the seven lower 
volutions are slightly decussated. It is the Clausilia bidens of 
Draparnaud. 
18. Lun #0 NIGRICANS. Trans. Linn. Soc. vol. viii. p. 180. 
Common in the same situations as the preceding. 
I have taken a curious variety in Friston wood much shorter 
and larger in girth than they usually are. Sometimes found with 
the strie nearly obliterated. 
The curious shell mentioned under the article T. Leachii, if 
not a variety of the Clausilia ventricosa of Draparnaud, must be 
assigned to this species. It was found under the bark of a tree 
on Harper's cliffs, in the parish of Levington ; is a fusiform shell, 
VOL. XIV. x having 
