hay: L. and F. W. shells of YORKSHIRE. 313 



Zonites alliarius. The commest shell at Guisborough. 

 Also found at Richmond, Bempton, 6^c. 



Z. nitidulus. Common at Guisborough, York, 6^c. 



Z. purus. Very common at Guisborough. 



Var. margaritacea. Equally common. 



Z. radiatulus. Askham Bog and Guisborough. 



Z. nitidus. Banks of the Foss. 



Z. excavatus. Ouse rejectamenta at York. 



Z. crystaMinus. Common at York, Guisborough, 6^c. 



Z. fiilvus. Abundant at Askham Bog; also at Guisborough 

 and Scarborough. 



Helix acuieata. Common at Guisborough ; also Butter- 

 crambe Moor. 



H. aspersa. Everywhere. 



Var. exaibida. A colony at Burlington. 



H. nemoraiis. Everywhere. Particularly abundant and 

 beautiful on Redcar Sandhills. 



H. arbustorum. Fulford Gravel Pits, near York, and at 

 Scarborough. 



Var. flavescens. Dringhouses. 



H. cantiana. Hedgerows near York. In great abundance 

 on brambles near Flambro' Head. Also at Hedon near Hull. 



H. rufescens. Scarce near York; common near Bemp- 

 ton, 6^c. 



Var. albida. Danes Dike. 



H. hispida and concinna. Common generally, 



H. virgata. Burlington. 



White var. Redcar Sandhills. 



H. caperata. Burlington and Redcar. 



