1851.] Linnean Society. 121 



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. pygmeea. 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. luhricns. 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. spirorhis, Limneus pereger, and Aplexus hypnorum. 

 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 neighbourhood. 

 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 auriciilarius , L. pereger, Pisidium pulchellum, and 

 Valval a cristata. A few hundred yards beyond this the water becomes 

 free of weeds and clear, and the whole tribe of Planorbis are left be- 

 hind. From Broadgate, all through the Highfield House estate, the 

 dike onljf contains Limneus pereger, and in one or two places Ancylus 

 fluviatilis, and on the moist mud on its banks Succinea Pfeifferi and 

 Limneus truncatulus. The Musco-Sic brook branches out from it at 

 Broadgate and joins it again at the east extremity of the Highfield 

 House estate ; this brook at first contains Planorbis marginatus, P. 

 vortex, P. carinatus, P. corneus, Bithinia tentaculata (very large), Val- 



