354 JOURNAL OF CONCHOI.OGY, VOL. I3, NO. 12, OCTOBER, I912. 



Curig lakes — (588 feet) I got a few P. pusillum and P. lilljeborgi; 

 and P. pusilhim in Llynau Diwannedd (1,208 feet), the twin lakes on 

 the western slopes of Moel Siabod. 



It is satisfactory to have established the occurrence of P. lilljeborgi 

 in Carnarvonshire ; further search will probably shew that it has a 

 wide distribution in the mountainous parts of Wales. 



Mr. B. B. Woodward, to whom the Pisidia which are the subject 

 of this note have been submitted, has kindly assisted me in determin- 

 ing the species. 



Clausilia biplicata Mont; — I had the pleasure in October last of visiting one 

 of the few remaining habitats near London for this extremely local British snail. 

 The species was plentiful enough at the time of my visit on the bank on which it 

 lives, and is apparently likely to remain so as long as the bank exists, but I am 

 sorry to say that all the indications are that the bank will in a very few years have 

 become a thing of the past. The grass and other vegetation on it was very scanty, 

 probably owing to the phenomenal heat of last summer, but in spite of this shells 

 were surprisingly numerous, including many other species besides the Clausilia. 

 The majority of the shells, however, were unfortunately in very eroded condition, 

 and I found it difficult to secure anything like a presentable set of C. biplicata. 

 In view of the fact that in Mr. L. E. Adams' " Manual," and also in one or two 

 other works, this species is associated with willows, it may be as well to mention 

 that, whatever may be the case elsewhere, the colony on this bank has obviously 

 no connection with willows, though there were certainly plenty of these trees on 

 the banks of the Thames some little distance away. I will only add that I have 

 written this note in the belief that it will interest northern conchologists to have 

 some recent evidence (the Wilts, records given in this Journal, vol. xii., p. 181, by 

 Mr. E. W. Swanton are all very old) that C. biplicata has still a claim to be con- 

 sidered a British snail, although it seems only too probable that its ultimate 

 extinction in the London district, owing to the constant extension of building 

 operations, is merely a matter of a comparatively short time {Jiead before the 

 Society, April loth, 1912). — F. B. Jennings. [We think Mr. Jennings takes too 

 gloomy a view of the prospects of C. biplicata on the Thames ; as there is at least 

 one other spot where this species was flourishing last year. — J. E.G.]. 



Land Shells from Scilly. — The following species were collected last June 

 during a short stay on the Island of Tresco : Balea perversa, Siiccitiea elegans, 

 Zua lubrica var. hibricoides. Pupa cylindracea, Pyrafnidula rotundata, Helicella 

 acuta, H. caperata. Helix nemoralis, Hygroinia revelata, H. rufescens var. rubetis, 

 Planorbis spirorbis, and Limncea pereger. The Recorder tells me that Balea is a 

 new record for Vice-County i. I am inclined to think that the Scilly Isles ought 

 to form a Vice-County to themselves. — J. R. le B. Tomlin. 



