of the Land and Fresh-water Shells of Suffolk. 153 



A distinct species, sent to me by Dr. Leach under the specific 

 name of ventrkosa. 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 Turbo 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. 179- 



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 Blakenham and Friston 

 woods. 



I have a variety from Friston wood, in which the seven lower 

 volutions are slightly decussated. It is the Clausilia bidens of 

 Draparnaud. 



18. Turbo 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 s trice 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 



