Mr. W. Thompson's Catalogue of Irish Mollusca. 109 



XVI. — Catalogue of the Land and Freshwater Mollusca of 

 Ireland. By Wm. Thompson, Vice-President of the Na- 

 tural History Society of Belfast. 



[Continued from p. 34.] 

 Gen. 5. Succinea, Drap. 



1. S. putris, Flem., Jeff. Gray, Man. p. 178f. 



S. amphibia, Drap. p. 58. pi. 3. f. 22 ; Turt. Man. p. 91. 

 Helix putris, Linn. Mont. p. 376. t. 16. f. 4. 

 Is generally distributed throughout Ireland. Specimens agreeing 

 with the var. /3. of Draparnaud — " major solidior, colore carneo" — 

 in form (see pi. 3. f. 23.), colour, and more than ordinary thickness, 

 though not in being larger than usual, are occasionally met with. The 

 varieties y% (" media magis elongata et colorata") and Z (" minor, 

 apertura ovata") are found in the north. Individuals of this species, 

 which adhere to stones in wet spots at a considerable elevation in 

 the northern mountains, are, as may be expected, invariably much 

 dwarfed in size. 



2. S. Pfeiferi, Rossm. Gray, Man. p. 179. pi. 6. f. 74.* 



S. gracilis, Alder, Mag. Zool. and Bot. vol. ii. p. 106. 



S. Amphibia, b. Pfeiffer, p. 67. t. 3. f. 37. 

 Although less common than the last, this species or variety is 

 widely diffused over the island — in the north it is not uncommon, 

 and is here generally of the same amber colour as S. amphibia ; as 

 likewise are English specimens which I owe to the kindness of Mr. 

 Alder; specimens of a reddish horn-colour, and much thicker than 

 usual, have occasionally occurred to me in the north, and in quan- 

 tity they have been obtained by Mrs. Patterson of Belfast, near Port- 

 arlington. Mr. Humphreys notices this shell under the name of S. 

 oblonga, Turt., as found about Cork, and by this appellation Mr. Har- 

 vey mentions Ballitore (county Kildare) and Limerick as habitats, 

 adding at the same time — " animal darker than in the last [S. amphi- 

 bia'], and found in far wetter places." From Finnoe (county Tip- 

 perary) I have been favoured by Mr. E. Waller with typical speci- 

 mens of this Succinea, as admirably represented in Gray's Manual 

 (f. 74*). 



6. Bulimus§, Bruguiere. 

 1. B. obscurus, Drap. p. 74. pi. 4. f. 23 ; Gray, Man. p. 183. pi. 6. 

 f. 63; Turt. Man. p. 81. f. 63. 



Helix obscura/Mw//. Mont. p. 391. t. 22. f. 5. 



f Wood-cut, p. 178.- — The coloured figure, pi. 6. f. 73, seems to me to par- 

 take as much of the form of 8. Pfeifferi as of S. putris. 

 X This is probably S. Pfeifferi. 

 § Bulimus Lackamensis, P'lem. Gray, Man. p. 181. pi. 6. f. 62. 



B. montanus, Drap. p. 74. pi. 4. f. 22 ; Turt. Man. p. 80. f. 62. 



Helix Lackamensis, Mont. p. 394. t. 1 1.. f. 3. 

 In Capt. Brown's ' Irish Testacea' this species appears under its original 



