302 MOLLUSCA. 



Genus Clausilia. 

 C. bidens, Drap., 



Is a rare and local species in Ireland. The first native specimens I have 

 seen were in the collection of Mr. T. W. Warren, of Dublin, who had 

 procured them in Belamont Forest, near Coothill, County Cavan. A few 

 specimens obtained by Mr. Callwell, on Hare Island, in the Shannon (L. 

 Pree) above Athlone. In Sept., 1837, I had the gratification of seeing 

 numbers of this fine Clausilia, after heavy rain, ascending the stems of the 

 stately trees in the demesne of Florence Court, County Fermanagh, the 

 seat of the Earl of Enniskillen. At Doyedale, in Derbyshire, I have met 

 with it. 



C. niriricans, Jeffi-eys, 



Is very commonly distributed over Ireland and the surrounding islands. 

 It is an extremely variable species, in being more or less ventricose, in the 

 stria:" being obscure or prominent, in the form of the mouth, and occasion- 

 ally even in the number of internal lamella? — the largest specimen I have 

 found in the neighbourhood of Belfast is 7^ lines in length, and has 

 thirteen volutions ; several others of the usual length of 6 lines have like- 

 wise this number. The colour commonly varies from a very pale grejdsh- 

 white to deep reddish-brown ; very rarely specimens of a glassy trans- 

 parency occur, and in such of these as I have found the animal was 

 equally colourless. To Mr. Gray, Mr. Alder, and Mr. Forbes I have 

 shown the specimens diff"ering as here described, and they agree with me 

 that they must all be considered C. nigricans. 



Family " AuillCULAD.E." 



Genus Carychium. 

 C. inininium, Mull. 



This minute species is commonly distributed over Ireland, and may be 

 found in moss, on decaying leaves and wood, under stones, &c., in dry as 

 well as wet places, though the latter are its favourite abode ; in the North 

 of the island specimens rarely attain one line in length. 



Geyius AcME. 

 A.fusca, Gray, 



Is rare in Ireland, but is widely distributed, being found over the island. 

 Dr. AV. H. Harvey was the first to find and distinguish this species as 

 a native — he notes it as not uncommon on the sand-hills in Miltown 3Ial- 

 bay, where in 1S26 he procured both the ordinary form and the variety 

 with the spires reversed. This shell has been procured by Mr. Hyndman 

 and myself in various localities in the Counties of Down and Antrim, but 

 not more than three or four individuals have been obtained on any one 

 occasion. I have more than once found this shell, containing the living 

 animal, under stones on bare clayey banks, in which situations the only 

 other mollusc met with was Helix crt/stallina. At Annahoe (County Ty- 

 rone) Ml-. Edw. AValler has obtained the A.fusca (both «. and b. Turton, 

 p. 83) ; as Mr. T. W. Warren has done in the neighbourhood of Dublin, 

 and the Rev. B. J. Clarke at La Bergerie, Queen's County. The Rev. T. 

 Hincks of Cork favoui's me with two southern habitats — Ballinhassig 

 Glen (County Cork) and near Mucruss, Killarney (County Kerry). 



