Mollusks. 3393 



Helix alliaria. Not abundant at Sawley and Thrumpton. 



H. cellaria. Abundant at Nottingham Castle, Sawley, and High- 

 field House. 



H. aculeata. Rather rare under decayed leaves, at Highfield 

 House and Stanton-on-the-Wolds. 



H. caperata. Very abundant at Stanton-on-the-Wolds in one field, 

 but not found elsewhere. 



H. crystallina. Not abundant at Highfield House, Bulwell and Oxton. 



H. granulata. Rare on Bulwell Forest. 



H. lucida. Not common at Bulwell, Oxton, Highfield House and 

 Stanton-on-the Wolds. 



H. nitidula. Rare at Bulwell and Oxton. 



H. pura. Rare at Oxton. 



H. pygmaea. Rare at Highfield House and Stanton-on-the-Wolds. 



Vitrina pellucida. Common at Oxton, both on the warren and on 

 the bogs, less abundant at Highfield House, Beeston, Bulwell, and 

 Stanton-on-the-Wolds. 



Carychium minimum. Tolerably abundant under leaves at High- 

 field House, Bulwell, Beeston, and Stanton-on-the-Wolds. 



Bulimus obscurus. Abundant at Nottingham Castle and Highfield 

 House. 



B. lubricus. Common at Highfield House, Sawley, and Thrump- 

 ton, and found at Bulwell, Oxton, and Stanton-on-the-Wolds. 



Azeca tridens. Rare at Highfield House. 



Pupa umbilicata. Very abundant at Nottingham Castle and at 

 Highfield House. 



Clausilia nigricans. Exceedingly common at Thrumpton, Bulwell, 

 and Highfield House. 



The following Mollusca are to be found associated together in the 

 same localities : — 



A dike running at the foot of Beeston, and passing behind the lake 

 at Highfield House, contains, where it passes through Mr. Barker's 

 field, the following shells : Planorbis corneus, P. marginatus, P. cari- 

 natus, P. vortex, P. spirorbis, Limneus pereger and Aplexus hypno- 

 rum. The dike is choked with weeds and filth from the village, and 

 warm water from a neighbouring mill here runs into it ; P. corneus is 

 found much larger in this warm dike than elsewhere in this neigh- 

 bourhood : 200 yards lower down the dike contains (where it runs 

 through the Rev. J. Wolley's fields), besides the above Planorbis tribe, 

 Cyclas lacustris, Limneus auricularius, L. pereger, Pi.sidium pulchel- 

 lum, and Valvata cristata. A few hundred yards beyond this the wa- 

 X. M 



