230 ROEBUCK : UPPER SWALEDALE CONCHOLOGICAL NOTES. 



Arion ater. An abundant species, which ranges further into the 

 moorlands than any other. Very numerous on the moorlands 

 near the Tanhill Colliery, at an elevation of about 1,500 feet, 

 and found plentifully by roadsides at Low Lane near Isles 

 Bridge, Feetham, Gunnerside, etc., and in Arkengarthdale near 

 Wood House. 



The var. succhiea occurred by roadsides at Angram, near 

 Satron, and in Arkengarthdale near Storthwaite; the var, 

 nigrescens by roadsides near Ivelet Bridge, near Gunnerside, and 

 near Isles Bridge ; the var. plumbea at Angram ; and the var. 

 brunjiea at Grinton. 



Arion subfuscus. One near Isles Bridge. 



Arion hortensis. Not uncommon by roadsides near Angram, 

 Satron, Gunnerside, and in Gunnerside Gill. 



Arion bourguignati. Common by roadsides and in fields ; near 

 Swale Bridge at Gunnerside, at Feetham, Low Row, and 

 doubtless everywhere in the low country. 



Limax agrestis. Very common about Satron, Gunnerside Gill, 

 Gunnerside, Strands, Isles Bridge, Low Lane, Feetham, Low 

 Row, and in Arkengarthdale at Storthwaite. 



The var. sylvatica Moq. is common about Gunnerside and 

 elsewhere. 



Limax laevis. Has been found in Gunnerside Gill and by sides 

 of roads near Gunnerside. 



Limax arborum. Not uncommon ; near Thwaite, Ivelet Bridge, 

 Gunnerside Gill, and by roadsides near Satron. 



Vitrina pellucida. Found singly on roadsides near Satron, 

 Strands, Low Row, Wood End near Feetham, and near Low 

 Whita Bridge. 



Zonites cellarius. Common ; at Kisdon Force Woods, Angram, 

 Thwaite, Scar House near Thwaite, Gunnerside Scars, Gill, and 

 village, Strands, and Wood End near Feetham. 



Zonites alliarius. Common by roadsides near Satron ; also 

 found at Gunnerside Scars and village. Barf Scars above 

 Strands, Wood End near Feetham, Healaugh, and in Arken- 

 garthdale near Wood House. 



Zonites glaber. One found in Low Lane near Isles Bridge. 



Zonites nitidulus. A common species ; Keld, Kisdon Force 

 Woods, Scar House near Thwaite, Satron, Gunnerside village 

 and Gill, near Ivelet Bridge, Strands, Barf Scars above Strands, 

 Low Lane near Isles Bridge, Wood End near Feetham, road- 

 sides at Healaugh, and in Arkengarthdale near Wood House. 



Naturalist, 



