192 JOURNAL OF CONCHOLOGY. 



From S. communis it differs in being generally more wide 

 at the base, not so solid, in the ridges being finer and more 

 raised, and especially in the transverse rib encircling the last 

 whorl. Jeffreys, in " British Conchology," vol. iv., p. 98, says 

 that " Miss Lavars picked up a specimen in Porthcurnow Cove, 

 near the Land's End, with other Scalariae. ... Its nearest 

 ally is S. communis. . . . This species may be British." 

 I have seen this specimen, which was found many years ago, 

 and which has hitherto remained unique as British. Probably 

 the shell may have been overlooked as a worn ^. communis, 

 and more specimens may come to light if collectors will look 

 over their stock and compare them with my description. I 

 shall be pleased to verify any doubtful specimens that may be 

 sent me. A figure of the shell is given in the additional 

 plates to Jeffreys' " British Conchology," and also in Sowerby's 

 "Illustrated Index of British Shells," a new edition of which is 

 just published. 



Scalaria groenlandica is also encircled by a keel at the base, 

 but is easily distinguished from 6*. pseudoscalaris by the strong 

 and conspicuous spiral striee between (he ridges. 

 Sevenoaks, Torquay, 



March, 1887. 



Colonizing Land and Freshwater Shells in East 

 Sutherland. — Some of my colonies near Brora are doing well. 

 Helix virgata and Bulimus acutus, from Llandudno, are now in 

 hundreds stretching north from mouth of Brora river for up- 

 wards of half-a-mile. Clausilia parvula, from Normandy, 

 seems also to hold its ground. I had a few of several others — 

 H. pisana, H. cantiana, and H. rnfescens — some of which sur- 

 vived last winter, and may hold their ground. Clausilia 

 laminata also holds on as yet. Cyclostoma elegaus also may be 

 alive, as I put them m some rockwork among the roots of ferrb. 

 Limncea siagnalis seem to have been picked by birds, as I can- 

 not find any trace of them as yet. — William Baii.lie. 



J.C, v., April, 1S87. 



