14 The hish Naturalist. January, 



Vertigo Lilljeborgi has been, of recent years, relegated to the 

 position of a variety of J", vtoulinsiana in the British list. 

 We fail to see any good reason for this, and consider the two 

 forms entirely distinct. Dr. Scharff, who has examined onr 

 specimens, concurs in this opinion. The shells have a wholly 

 different facies, although the general shape is similar. 

 V. Lilljeborgi has a blunter apex and a much shorter body 

 whorl in proportion to its size ; it is darker in colour, and 

 much more glossy ; the umbilicus is less open, and the size is 

 uniformlj^ smaller by about half a millimetre in height and a 

 quarter in breadth. At first acquaintance one was inclined to 

 confuse it, not with V. moiilinsiana^ but with V. antivertigo ; it 

 has, however, a much blunter apex than the last-named species, 

 and the teeth are quite different, being normally four in number. 



We met with the species again at Roundstone, Co. Galway 

 in a precisely similar habitat to that at Ballynahinch, so that 

 it seems probable that it is widely distributed in the lakeland 

 of western Galway. It is worthy of mention that our Round- 

 stone specimens are considerably darker in colour than those 

 from Ballynahinch. 



On the Continent Vertigo Lilljeborgi occurs in Norway and 

 Sweden, and was originally described by Westerlund in 1865 

 as V. modesta. As this name was found to be pre-occupied by 

 Say, it was altered in 1 868 to the one now in use. 



Southport 



Note on the above Paper. 



The re-discovery of Vertigo Lilljeborgi \n Ireland b)- Messrs. Chaster and 

 Tonilin must be cheerful news to all couchologists, and it definitely 

 settles the point whether Jeffreys' original discovery referred to this 

 species or to the allied V. monlinsiana. 



When I wrote my paper in the hish Naturalist, vol. I , on the " Irish 

 land and fresh-water Mollusca," I had not seen a specimen of J'. Lilljeborgi, 

 and a shell I took on the Aran Islands seemed to me to agree more 

 closely with the description of V. moid in si an a, but as my only specimen has 

 unfortunately been lost, I cannot now recompare it in the light of more 

 recent researches. Possibly both species may occur on the west coast 

 'of Ireland, but until a specimen of V. nioidinsiana is forthcoming it 

 would be better to omit it from the Irish list. 



R. V. S. 



