Quarterly Journal of Conc/iology. 27 



Zonites radiatulus Alder. — In wet moss; not very plentiful. The 

 variety occurs in Gibside Woods, Durham. 



Zonites nitidus Muller. — Occurs occasionally ; not common. 



Zonites excavatus Bean. — Rather rare. Occurs at Stella Dean, 

 also in Gibside Woods, where there is a white variety occasionally 

 found, but sparingly. 



Zonites crystallinus Muller. — Common throughout the district. 



Zonites fulvns Mnller. — Occurs occasionally, but only sparingly. 

 The variety is found in a marshy spot in Heaton Dean, near Newcastle. 



Helix lamellata Jeffreys. — Rather rare. It is met with occasion- 

 ally in Gibside Woods, Durham, Walbottle Dean, Northumberland, 

 and Tanfield Woods, Durham, but sparingly. 



Helix aculeata Muller. — Rather rare throughout the district. 

 Occurs at Ryhope Dean and Castle Eden Dean, Durham. 



Helix aspersa Muller. — In gardens and on hedge sides, common. 

 Very abundant on the sea banks on a limestone soil. 



Helix nemoralis Linne. — Common throughout the district. 



Helix nemoralis var hortensis Muller. — In woods and hedge 

 banks, occasionally. 



Helix nemoralis var hyl)rida Poiret. — This species occurs at Stella 

 Dean, but is not generally met with throughout the district. 



Helix arbustorum Linne. — Frequent in woods and on hedge sides 

 amongst nettles. 



Helix Cantiana Montayu. — Not very common. More plentiful 

 nearer Sunderland and on the sea banks adjacent. 



Helix rufescens Pennant. — Does not occur in the district round 

 about Newcastle, but is found occasionally near Sunderland and other 

 parts of the magnesian limestone district. 



Helix concinna Jeffreys. — Common on nettles and other plants by 

 hedge sides about Newcastle, where it takes the place of H. rufescens. 



Helix hispida Linne. — Common throughout the district. 



Helix sericea Muller. — In woods, rare. Occurs in woods at Tan- 

 field, and in Bath Wood, Dinsdale, county of Durham. In the 

 vicinity of Rothbury, Northumberland, it occurs somewhat more 

 abundantly. 



Helix virgata Da Costa. — Occurs occasionally ; more frequently 

 on the sea banks near Sunderland. 



HeHx caperata Montagu. — Common throughout the district, more 

 especially on a limestone soil. Very abundant on the hills near Roth- 

 bury, Northumberland. 



Helix ericetornm Muller. — Not very common. Occurs at West 

 Boldon, Durham, on a limestone soil, and at various parts of the sea 

 coast between Shields and Sunderland. 



Helix rotundata Muller. — Common throughout the district. The 

 beautiful greenish white variety has occasionally been foxmd in Ben- 

 well Lane and Tanfield, in the county of Durham. 



Helix rupestris Studer. — In old limestone quarries and old walls. 

 Local, and apparently confined to limestone. Tolerably abundant at 

 Byer's Quarries, near Marsden, in the county of Durham. 



