DEAN AND KENDALL : VERTIGO ALPESTRIS. 



Cartmel 



Lindale 



Witherslack 



Levens 



Crooklands 



Arnside 



- V.C. 69. 



Berwick 

 Whittington 



Clifton 

 Penrith 



I V.C. 60. 

 I V.C. 69. 



Vertigo alpestris occurs alone at 

 Cartmel Crooklands 



Vertigo pustlla occurs alone at 

 *Cartmel (distinct from above) 

 Beetham - - - - 



Burton-in-Kendal 



Yealand Conyers 

 *Priest Hutton - 



Penrith. 



V.C. 69. 



V.C. 60. 



V.C. 69. 



V.C. 60. 



V.C. 



Vertigo pusilla occurs with V. alpestris at 

 Grange - - - - 



*Lindale - - - - 



*Witherslack 



*Levens - - - - 



Arnside - - - - 



*Borwick - - - - 



*Whittington 



Silverdale - . - 



*Clifton - - - - 



Kirkby Lonsdale 



* V. pusilla recorded for the first time from these localities. 

 Note. — Vertigo pusilla also occurs separately on other walls within the districts 

 mentioned for both species occurring together. 



The constant association of the two species is a matter of con- 

 siderable interest, and we should like, before closing, to draw attention 

 to a small group of localities where V. pusilla, the commoner species, 

 occurs alone. A glance at the map will show that we have, encircl- 

 ing the village of Burton-in-Kendal, a chain of stations for this 

 species unassociated with V. alpestris. These are Yealand Conyers, 

 with Holmer Hall and Tewetfield, Priest Hutton, Burton at Dalton 

 Hall and Clawthorpe, and Beetham. 



The point we wish to draw attention to is this — that V. pusilla 

 persists in drier and more exposed situations than V. alpestris. 

 Burton itself lies on the eastern slopes of an exposed valley, running 

 north and south. It is somewhat sheltered on the eastern side by 

 Farlton Knott and Hutton Roof, and it is on these eastern slopes that 

 we find V. pusilla at the comparatively high altitude of 300 feet. 



