42 JOURNAL OF CONCHOLOGY, VOL. 12, NO. 2, APRIL, 1907. 



J. muscorum L. — Somewhat local. Cockersand Abbey and 

 along the coast ; Silverdale ; Arnside Tower ; " along the cliffs from 

 Arnstde Knott to Jenny Brown's Point " (R.S.). 



Vertig'O substriata Jeffreys. — Grange-over-Sands, in Eggerslack 

 Woods (R.S.), 1897. Recorded first for Silverdale by Mr. J. W. 

 Jackson, 1903 ; see also Standenyi of Conch., vol. 11, p. 327, 1906. 



V. pygmaea Draparnaud. — Warton, at the base of the crag ; 

 Silverdale, at Bankwell and Haweswater ; Hazelsiack ; Far Arnside ; 

 Grange-over-Sands (R.S.). Not a very common species. 



V. alpestris Alder. — This species is recorded from three localities 

 only : Grange-over-Sands, Eggerslack Woods, and at intervals to 

 Holker ; Silverdale, in the vicinity of Haweswater (J. W. Jackson) ; 

 and near the Devil's Bridge at Kirkby Lonsdale in Westmorland. 

 The first record of this rare shell for the district was that of Holker 

 by Mr. C. H. Moore in 1902. 



V. pusilla Miiller. — This species was first recorded for Silverdale 

 by Mr. F. C. Long in 1891, The southern limits of its range would 

 appear to be Yealand Conyers. Other localities are Burton-in-Kendal 

 and towards Beetham ; Arnside ; Grange-over-Sands (R.S.) ; Holker 

 (Jackson and Moore) ; Kirkby Lonsdale ; and one specimen taken 

 in very dry weather at Overtown would point to a connection with 

 the Ingleton district. 



Balea perversa L. — Local, but often very common. In the 

 limestone area at Burton-in-Kendal ; Yealand Conyers and Yealand 

 Redmayne ; Silverdale; Arnside; Grange-over-Sands (R.S.) ; Kirkby 

 Lonsdale ; Holker (C.H.M.). A fine colony occurs near Caton on a 

 millstone wall, which has little or no vegetation upon it. These shells 

 are curiously weathered, like some of the Ligleton specimens. 



Clausilia laminata Montagu. — A fairly common species in the 

 limestone area. Warton ; Silverdale ; Arnside ; Grange-over-Sands 

 (Jackson and Moore), 1903; the Yealands ; Kirkby Lonsdale ; etc. 

 On the millstone : one specimen from the river bridge at Caton, 

 others from the aqueduct, Lancaster (both records J. W. Jackson). 



C. bidentata Strom.— An exceedingly common shell throughout 

 the district. Lancaster and district ; Warton ; the Yealands ; etc. ; 

 and throughout the limestone area. 



var. cravenensis Taylor. — A well-marked form, occurring in 

 colonies in the limestone area only. First recorded for Silverdale by 

 Mr. J. B. Dixon (as C. dubia, J. of Conch., -wol. 7, p. 136, 1892); 

 Grange-over-Sands (R.S.); Arnside, near the station (H. Beeston) ; 

 the Yealands ; walls above Deepdale ; Woodwell (R.S.); Humphrey 

 Head (Jackson and Moore). One Silverdale locality, — rocks at the 

 north end of Haweswater. 



