THE MOLLUSCA OF 
PENISTONE, SOUTH-WEST YORKSHIRE. 
LIONEL E. ADAMS, B.A., 
Northampton; Hon. Treasurer to the Conchological Society. 
THE following is a list of the shells which I have taken within five 
miles of Penistone, during the period of my residence there, from 
January 1889 to December 1892. The total number of species 
I am able to record is 35, composed of 9 slugs, 19 land and 
7 freshwater mollusca. 
Gunthwaite Wood is the only spot in this desolate region of 
millstone grit that is worth a search. Its chief features are the 
quantity of Hyalinia pura, and the tendency to white varieties of the 
ffyalinie. In summer the Scout Dam is always to be searched for 
curious forms of Limnea peregra and scalariform Planorbis albus. 
The slugs have been identified by Mr. W. Denison Roebuck. 
Arion ater. Very common. Var. drunnea. Gunthwaite. 
Arion subfuscus. Common in the district. 
Arion minimus. Common in the district, eactaity in Gunthwaite 
Wood. 
Arion hortensis. Common in gardens ; a single = of var. 
grisea. 
Arion circumscriptus. Very common, and very variable in 
colour. : 
‘maximus. Moderately common in a garden. 
Limax arborum. Cubley Wood; a = of var. memorosa 
in my garden at Rose Hill. 
 Agriolimax agrestis. Verycommon. Onone occasior I found — 
Var. migra in copula with a typical specimen. 
Agriolimax levis. Common in Gunthwaite Wood. 
: Vitrina pellucida. Common. Often cloudy. 
oS _ Hyalinia cellaria. Moderately common. Several oe of 
__var. a/bina in the district. 
i raga shea, Two es of var. viridans in Gunthwaite 
Hyalinia alliaria. Common ; : and the var. viridula ee oe 
a : Byala nitidula. ‘Common i in the district. 
