Stelfox — List of Land and Freshwater MoUusks of Ireland. 103 



Clausilia laminata (Montagu). 



Clausilia lidens, Thompson, Cat. L. and 

 F. W. MoU. of Ireland, p. 28, 1840. 



WD ED LD AN 



FE TY AR DO 

 WMSL LE MO 



EM EO CV LH 

 WG NG LF WH ME 

 SG EC ED DU 

 CL NT QC CW Wl 

 NK LE ST KK WX 

 SK MC EC WA 

 WO 



Has a remarkable distribution in this 

 country, quite unlike that of any of our 

 other mollusks, and is one of our rarest 

 and most local land-shells, although 

 its distribution in Europe is fairly 

 extensive. UntilDecember, 1910, when 

 I took a single specimen at Enniskerry 

 in Wicklow, it was known only from 

 the districts lying around the great 

 elevated mass of C'uilcagh in Cavan. 

 In some of the glens, and in the woods 

 which lie around the base of this 

 mountainous area, it can be collected in 

 fair abundance. The old record from 

 Church Island in Lough Gill, Sligo, 

 though seemingly authentic, has not 

 been verified by conehologists who have 

 recently visited that locality, and must 

 therefore be regarded as doubtful for 

 the present. The locality attached to the 

 specimens in the Thompson Collection 

 in Belfast— "The Giant's Causeway" 

 — probably is due to the many hands 

 through which the collection has passed, 

 as all specimens in the collection were 

 formerly kept in trays, and several 

 other palpable mistakes occur in the 



localities which are attached to shells. 

 Mr. Welch's recent find of this shell 

 at Carrickreagh on the southern shore 

 of Lower Lough Erne in Fermanagh is 

 a considerable extension of its range. 



The white form has occurred sparingly 

 in the Glen of the Marble Arch, and at 

 Florencecourt, both in Fermanagh. 



Clausilia bidentata (Strom). 



Clausilia nigricaju, Thompson, Cat. L. 

 & F. W. Moll, of Ireland, p. 28, 

 1840. 



WD ED LD AN 

 FE TY AR DO 

 WMSL LE MO 



EM RO CV LH 

 WG NQ LF WH ME 

 SQ KG KD DU 

 CL NT QG CW Wl 

 NK LK ST KK WX 

 SK MC EG WA 

 WG 



A ubiquitous species and found 

 throughout the mainland and islands. 

 Besides the type, which according to the 

 late Prof. Boettger is generally known 

 in England as var. everetti, two well- 

 marked forms are also known to occur. 

 The first is the var. gracilior of Jefireys, 

 which is frequently met with in most 

 parts of the country, but is particularly 

 common in some of the wooded districts ; 

 examples from Tore Woods at Eillamey 

 probably mark the extreme variation in 

 this direction. 



The second form is the var. septeii- 

 trionalis A. Schmidt : this occiu's in parts 

 of the west and on some of the western 



