Stei.fox — List of Land and Freshwater 31ollusks of Ireland. 121 



Yalvata cristata Miiller. 



Tufho cristatus, Brown, Mem. Werner. 

 Soc, vol. ii, p. 522, 1818. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NG LF Wrt ME 

 SG KG KD DU 

 GL NT QG CW Wl 

 NK LK ST KK WX 

 SK MG EG WA 

 WG 



Perhaps even more generally dis- 

 tributed than the last species, but has 

 not been found except on the mainland. 



ACICULIDAE. 



Acicula lineata (Draparnaud). 



Acmefusca, Thompson, Cat. L. & F. W. 

 Moll, of Ireland, p. 29, 1840. 

 A. lineata, Scharfl, Irish Naturalist, 

 p. 177, 1892. 



WD ED LD AN 



FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NG LF WH ME 



SC KG KD DU 



GL NT QC CW Wl 

 NK LK ST KK wx 

 SK MG EG WA 



WG 



Widely distributed, but so far un- 

 recorded for twelve divisions, all of 

 which are inland with the exception of 



K.I.A. PEOC, VOL. XXIX., SECT. B. 



Wexford. That this sliell will eventually 

 be found in all divisions is not im- 

 probable ; but some of the districts lying 

 in the central plain offer few habitats 

 for such a shade-loving species ; and it 

 is therefore possible that it may not live 

 in a few of these areas. Three colour 

 forms are found, tlie dark-brown type, 

 a paler brown, and the pure white form ; 

 of these the last is perhaps the most 

 common of the three, while tlie other 

 two occur in about equal quantity. On 

 Clare Island — the only island from 

 which the species has been reported — 

 and on the adjoining mainland of West 

 Mayo, I have seen none but the brown 

 forms. In a little sea-gully near Slea 

 Head, the most westerly point of the 

 Dingle promontory, this shell has been 

 taken in great numbers by Mr. Welch 

 and myself ; a few handfuls of moss, 

 liverworts, &c., yielding over 200 

 specimens of the white and brown 

 forms, 



NERITIDAE. 



Neritina fluviatilis (Linno). 



Neritafluviatilis, Brown, Mem. Werner. 

 Soc, vol. ii, p. 532, 1818. 



WD ED LD AN 



FE TY AR DO 



WMSL LE MO 



EM RO CV LH 



WG NG LF WH me 



SG KG KD DU 



GL NT QG CW wi 



NK LK ST KK wx 



SK MC EC WA 



WC 



In Ireland this is strictly a calcicole 



