SOPPITT AND CARTER : UPPER AIREDALE MOLLUSCA. 97 



MOLLUSCA TERRESTRIA. 



ARIONIDM. 



Arion ater L. Abundant and generally distributed. 



Var. brunnea Roeb. Common. Shipley Glen; Hawksworth. 



Var. rufa L. Nab Wood. 



Var. plumbea Roeb. Shipley Glen. 

 Arion subfuscus Drap. Marshy field, Tong Park, 1887; Saltaire, 

 1887. 



Arion hortensis Fer. Common everywhere. 



Arion bourguignati Mab. Often found in company with A. 

 hortensis^ and probably equally common (Mr. Roebuck tells us 

 that it is probably generally much commoner, occurring in the 

 open fields with L. agrestis, while A. hortensis prefers gardens). 



LI MAC I D^. 



Limax maximus L. Generally distributed. Bradford, Manning- 

 ham, Saltaire, Bingley, Steeton, Airton. 

 Var. cinerea Moq. Charlestown. 

 Limax cinereo-niger AVolf. Rare and local. One, Shipley 

 Glen, 1883. 



Var. maura Held. One, Shipley Glen, 1886. 

 Limax flavus L. Frequent in cellars, etc., Bradford. 

 Limax agrestis L. Abundant everywhere. 



Var. sylvatica Moq. non Drap. Abundant everywhere. 



Var. nigrescens Colb. Gardens near Peel Park, Bradford. 

 Near Apperley. 



Limax laevis Miill. Local. Bog, Shipley Glen ; Fagley Wood, 

 near Malham Tarn, September 1883 (Roebuck and Butterell). 



Limax arborum B.-Ch. Not common. Calverley; Idle; Seven 

 Arches, near Bingley; Cottingley ; Gordale Scar, 1877 (W. 

 Nelson) ; Airton near Malham. 



HELICIDAL. 



Succinea putris !>. Generally distributed and common in 

 suitable situations. Canal-bank, Bingley to Apperley ; Marley, 

 very fine; Airton, near Malham; Gordale, 1,300 ft, two 

 examples incrusted ; Malham Tarn, 1883 (Roebuck and 

 Butterell). 



Var. albida. An albino specimen found near Apperley, 1887 

 (A^Hartley). 



April 1888. 



