342 Ke7V : Snails and Spiders on Toiners. 



islands, all hitherto have been single-banded or bandless ;* and 

 I am indebted to Mr. G. K. Gude for the opinion that similar 

 conditions prevail in all the numerous varieties — and in the 

 immediate allies — oi Helicigona arbustorum in continental Europe. 

 Beyond the section to which this species belong-s, however, but 

 still within the genus Helicigona — -and the fact is of special 

 interest in the present connection — there are many species with 

 bands placed similarly to those of the Aysgarth shell ; and 

 having in addition still another band a little below the periphery. 

 These shells have the supra-peripheral band of Helicigona arbus- 

 torum with one above and one below it ; and this three-banded 

 condition may be said to be typical of Helicigona, which never 

 presents the five bands of Helix. It is perhaps desirable to give 

 the two-banded form of Helicigona arbustorum a varietal name : 

 this is the view of Mr. Gude ; and as the opinion of one admitted 

 by Pilsbry to the first rank of Helicologists is worthy of due 

 respect, I have ventured to propose a name for our shell, in 

 the hope that renewed search in the neighbourhood of Aysgarth 

 and elsewhere in Wensleydale may result in the finding of 

 further specimens. 



Helicigona arbustorum v. bifasciata v.n. Resembling the 

 type, but having two bands ; one normally placed, the other 

 midway between it and the suture. A)-sgarth : 5th May 1903 

 (F. W. Wilson) ; in the collection of Mr. G. K. Gude. 



•^-^■^- 



SNAILS AND SPIDERS ON TOWERS. 



H. WALLIS KEW, 

 London. 



The readers of ' The Naturalist ' are doubtless grateful to the 

 Rev. E. P. Blackburn for his interesting note (p. 265) of the 

 finding of at least a dozen shells of Hygromia hispida of varying 

 sizes at the top of the high tower of Bridlington Priorj^ It is 

 perhaps reasonable to conclude that these shells, though dead, 

 represented a temporary establishment of the snail in this 



*The late Mr. Mansel-Pleydell in his ' Land and Freshwater MoUusca 

 of Dorsetshire,' Proceeding's of the Dorset Natural History and Antiquarian 

 Field Club, VI. (1885), p. 109, notes under H. arhustorum : ' Houg-hton Wood 

 (shell smaller, with three brown bands round the last whorl)' ; and a similar 

 entry appears, without further particulars, in the same author's ' MoUusca 

 of Dorsetshire,' 1898, p. 12. It would be well to be assured that there is 

 no possibility of error here, and to know the condition and position of the 

 bands. My endeavours to trace the specimen, however, have not been 

 successful. 



Naturalist, 



