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



riety in form and colour ; the toothless var. not unfrequently occurs, 

 and on a sea-bank at Belfast Bay I once obtained a specimen with 

 two teeth f, but differing in no other respect from the ordinary shell, 

 I cannot consider it otherwise than an accidental variety of P. um- 

 bilicata. Specimens whitish and opake, like " dead shells," not un- 

 frequently occur containing the living animal. Occasionally in the 

 north, at the South Islands of Arran, and about the lakes of Killar- 

 ney, I have procured a few individuals of a crystalline transparency, 

 the elegance of their appearance being much enhanced by the pure 

 white margin of the peristome. The animal is of a very pale grey 

 colour. 



2. Pupa Anglica, Alder. Gray, Man. p. 195. pi. 7. f. 82. 

 Vertigo Anglica, Fer. Turt. Man. p. 102. f. 82. 

 This species, considered peculiar to England when described by 

 Ferussac, and in the very latest work treating of the British land 

 Mollusca having only the localities — "north of England, Northum- 

 berland, Lancashire," attributed to it, is found in the north and 

 south, in the east and west of Ireland ; but at the same time is by no 

 means general, or, except in particular spots, plentiful, like P. umbi- 

 licata. Under stones, on marsh plants, in wet moss, &c. it harbours. 

 I first met with it in June, 1833, in the county of Londonderry, at 

 the side of the river Bann near its junction with the ocean ; in nu- 

 merous localities throughout Down and Antrim, and in the demesne 

 of Florence-court, county Fermanagh, it since occurred to me ; in 

 the west on the mountain of Benbulben in Sligo ; in the south about 

 O' Sullivan's cascade, at the lower lake of Killarney ; and in the east 

 in the Glen of the Downs, county Wicklow. Mr. W. H. Harvey 

 obtained this species " near Ballitore and on the sand-hills, Miltown 

 Malbay," but notes it as very rare. In the collections of Mr. T. W. 

 Warren and Mr. Edw. Waller of Dublin, are specimens procured by 

 the former gentleman at Ardmore (county Waterford), and in the 

 neighbourhood of the metropolis ; and by the latter at Annahoe, 

 county Tyrone — near Portarlington it is found by the Rev. B. J. 

 Clarke, and by the Rev. T. Hincks near Cork, where it is " abun- 

 dant in wet moss." In England I have collected the P. Anglica 

 at Twizel House, Northumberland ; in Scotland about Ballantrae, 

 Ayrshire. 



The shells of this Pupa commonly vary in colour from pale grey- 

 ish brown to a deep reddish shade of this colour, and are rarely of a 

 glassy transparency : the margin of the mouth and teeth are gene- 

 rally of the colour of the shell, but sometimes pure white. Mr. Gray 

 having had the opportunity of consulting the work only of M. Mi- 

 chaud, refers his Pupa tridentalis with doubt to this species, but from 

 having been favoured by its describer with specimens of this shell from 

 the neighbourhood of Lyons, I can state with certainty that it is en- 



f Capt. Brown, in his 1 Illustrations,' &c. quoting PfeifFer, notices his P. 

 bidentatus as a Portmarnock shell. My specimen is not identical with what 

 PfeifFer figures. Rossmassler does not consider P. bidentatus distinct from 

 P.marginata. See Rossm. Part I. p. 83; and Gray, Man. p. 197. 



