78 



Proceedings of the Rotfal Irish Acculemy. 



Hyalinia cellaria OJ^iiUer). 



Plate Yn, figs. 51, 52. 



Helix eellarta, Thompson, Cat. L. & F, V. 

 Moll, of Ireland, p. 18, 1840. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NG LF WH ME 

 SG KG KD DU 

 CL NT QG GW Wl 

 NK LK ST KK WX 

 SK MG EC WA 

 WG 



Generally distributed and usually 

 common in all parts of the conntry and 

 on most of the ■western and other islands. 

 Practically all the full-groicn Irish spe- 

 cimens I have seen could be referred to 

 the Vitrea hfbemiea of Kennard; but in 

 several localities in the eastern counties 

 this shell does not appear to grow beyond 

 the usual size of English specimens. A 

 variety ■with more globular shell, smaller 

 umbilicus, rounder aperture, more po- 

 lished surface, and usually more delicate 

 texture, is found locally in the south 

 and ■west. It is this latter shell that 

 has been described by Mr. Kennard as 

 Vitrea uharffi. ; and it is also, I think, 

 that which has been often mistaken for 

 and recorded as Hyalinia helvetica Blum 

 or H. glabra Studer, from ■which it is 

 at once distinguished by its possessing 

 the sutural striation of the H. cellaria 

 group. ^ All these conical, highly 

 polished specimens are, in my opinion, 

 young shells of a ■woodland form of 

 Hyalinia cellaria ; and until further 



' Iiiah Xat., Oct., Nov., and Dec, 1910. 



evidence on the matter is forthcoming 

 I must regard all these as variations 

 of one species. The whitish form of 

 Hyalinia cellaria is found in several 

 districts, principally in the south and 

 west; and in some areas, as, for instance, 

 near Kilkemiy and the districts around 

 Abbeyleix and Dnrrow in Queen's Co., 

 it is the prevailing form. Personally 

 I have never taken this white form 

 except in churchyards in West Mayo : in 

 all of these which I have visited in that 

 division it has been the only form ob- 

 served. Perhaps the most remarkable 

 shells of this species I have seen are 

 those taken by Mr. Welch in the old 

 woods at trlenear, in SUgo,- and similar 

 ones collected by Mr. Phillips in woods 

 at Woodford, S.E. Galway. (Plate VII, 

 figs. 51-52.) These are large and very 

 high-spired, and have less rapidly in- 

 creasing whorls than most of our Irish 

 examples usually have ; the last whorl 

 is also greatly depressed towards the 

 aperture. 



Hyalinia alliaria (Miller). 



Helix alliaria, Thompson, Cat. L. & 

 Y. W. MoU. of Ireland, p. 18, 1840. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO GV LH 

 WG NG LF WH ME 

 SC KG KD DU 

 GL NT QG GW Wl 

 NK LK ST KK WX 

 SK MG EG WA 

 WC 



' Tliese shells have been recorded by Mr. 

 Taylor in his monogiaph (vol. iii, p. 55) as 

 Syalinia htltttiea Blom. 



