120 Mr. W. Thompson's Catalogue of the Land and 



Lough Neagh and other lakes in Ireland : it is found attached to 

 stones at the edge of the water, and where the adjacent bottom is 

 stony, with very little vegetation — under similar circumstances it 

 has also occurred to me in the first-named locality. It is identical 

 with the var. j3. of Mr. Jeffreys, who has favoured me with speci- 

 mens from Battersea, near London. The small size, different colour, 

 and freedom from all adventitious matter, I should be disposed to 

 attribute to the colder water and less food in such localities, than in 

 the ponds and ditches, in which the ordinary form prevails. 



6. Limneus truncatulus, Jeffreys. Gray, Man. p. 240. pi. 9. f. 108. 



L. minutus, Drap. p. 53. pi. 3. f. 5 — 7. 

 L. fossarius, Turt. Man. p. 124. f. 108. 

 Helix fossaria, Mont. p. 372. t. 16. f. 9. 



Is generally distributed over Ireland. It inhabits drains, ditches, 

 &c, like the L. palustris ; but in moist spots, and about springs, at 

 a considerable elevation in the northern mountains f, is likewise 

 found, and is here always of a very small size. In July, 1833, when 

 accompanied by Mr. Hyndman, I remarked many of this species 

 alive, and adhering to stones which lay dry upon the shore of Lough 

 Neagh, far above the summer level of its waters]: — these were of 

 uniform size, very small, and when containing the living animal, of 

 a very dark reddish brown colour. Many varieties of the L. trun- 

 catulus have occurred to me in Ireland ; among them was one very 

 much elongated, and another with regular longitudinal striae, the 

 latter of which is well remarked by Dr. Turton, to be " very elegant." 

 Man. p. 125. 



7. Limneus glaber, Gray, Man. p. 242. pi. 9. f. 106. 



Limneus elongatus, Drap. p. 53. pi. 3. f. 3, 4; Turt. Man. p. 



122. f. 106. 

 Helix octanfracta, Mont. p. 396. t. 11. f. 8. 



I have not seen any Irish specimens of this Limneus, which is thus 

 noticed in the supplement to Mr. Jeffreys's paper in the Linnean 

 Transactions, vol. 16. p. 520 : " Ireland, Rev. James Buiwer." On 

 inquiry of Mr. Bulwer, he stated that the shell so noticed was con- 

 sidered by him but a variety of L. palustris. By a letter from Mr. 

 Jeffreys, dated June 8, 1840, I learn that " L. elongatus was men- 

 tioned as Irish on the authority of the late Dr. Goodall, who stated 

 that he had received specimens from Mr. Bulwer." Mr. Jeffreys 

 adds, " I have, however, two or three undoubted specimens among 

 a collection of Irish shells, which I purchased about three months 

 ago from Mr. John Humphreys of Cork — the tray which contained 

 them was labelled ' Cork.' " From Mr. Humphreys I learn that he 



f In such places it is preyed on by the Lapwing (Vanellus cristatus), from 

 whose stomach I have taken it. 



% Montagu has, on the contrary, remarked that when left dry the animal 

 perishes. Test. Brit., p. 372. 



