86 



The Naturalist. 



Bulimus ohscurus, Miill. Common at Aysgarth Force ; a single 

 specimen on the waste land near Eedmire Station. 

 [Leyburn, 1877 — H. Crowther.] 



Fupa umhilicata, Drap. Common on Leyburn Shawl, at Middleham 

 Castle, about Aysgarth Force, and at Leas House, near Askrigg ; 

 occurred also amongst moss collected in Whitfield Gill. 



[Carperley, 1877— H. Crowther; Hardraw Scar 1877 — Nelson.] 

 Pupa uni.bilicata, var. alhhia^ Moquin-Tandon. Carperby, 1877 — - 

 H. Crowther.] 



Balia perversa, L. In September, 1877, Messrs.- Nelson and 

 Taylor found this species occurring in great profusion under the top 

 stones of walls throughout Wensleydale, the shells turning up under 

 almost every stone examined. In August, 1882, we certainly did not 

 find it so numerous, nor at all generally distributed ; but as the 

 specimens we did get were those which the spiders had forcibly 

 detained and probably killed, it may have been the dryness of the 

 weather that prevented our finding living examples in as great 

 abundance as my friends did five years ago. Mr. Skipwith and I 

 found the spider-captured shells not uncommon on walls by the road- 

 sides, east of Wensley, at Castle Banks, near Bolton, and on the 

 bounder-walls of Gillfair Wood, but nowhere else. 



[Carperby, 1877 — H. Crowther; Cotter Force, 1877 — W. Nelson. 



Clausilia riigosa, Drap. Common about Wensley, at Aysgarth 

 Force, at Whitfield and Mill Gills, on the waste land at Redmire, 

 and at Castle Banks, near Bolton ; we also found it at Gillfair 

 Wood, Thornton Rust, Leyburn Shawl, and Jerveaulx Abbey. 



[Birk Rigg and Carperby, 1877 — H. Crowther j East Witton, 

 1877— W. Nelson.] 



C. dubia, Drap. Besides those we found in Semerdale, we only 

 found one specimen in Wensley dale ; this was by the road-side, east 

 of Wensley. 



[Cotter Force, 1877— W. Nelson; Jerveaulx Abbey, 1877— 

 J. W. Taylor ; Fencote, Wensleydale— W.N.] 



G. laminata, Mont. Two specimens found at Aysgarth Force. 



CocJilicopa tridens^ Pult., var. Noiiletiam, Dup. Whitfield and ' 

 Mill Gills, one example at each place. 



C. lubrica, Miill. Not unfrequent on Leyburn Shawl, at Castle 

 Bolton, Aysgarth Force, Low Gill near Aysgarth, and at Redmire. 



[Hawes, 1877 — H. Crowther.] 



Carycliium rjiinimum, Miill. Common amongst moss, and on 

 decaying leaves in moist places at Whitfield Gill. 



