292 MOLLUSCA. 



H. hispida, and in its ordinary depressed form ; still the typical specimens 

 of these two Helices are very distinct in appearance, but through their 

 varieties Avould almost seem to unite. 



" H. circimita, Fer." 

 I cannot perceive any difference between some of my North of Ireland 

 specimens of //. concinna, when completely denuded of their hairs, and a 

 shell so named which I owe to the kindness of Mr. Alder. 



H. ru/escens, " Penn." 



This species is common to the southern two-thirds of the island : as far 

 North as Banbridge in the County of Down it has been found, and on 

 old walls at Rostrevor, 1848, by the Rev. G. Robinson. 



H. Pisana, Mull. 

 This fine, and local species, was first noticed as Irish in Turton's Cata- 

 logue (p. 8), from specimens collected at " Balbriggan Strand," or, as 

 more correctly given by their discoverer, M. J. O'Kelly, Esq., in the edi- 

 tion of Pennant's British Zoology published in Dublin in 1818, "near 

 Balbriggan, on the County Meath side of the stream that divides this 

 County from Dublin," vol. iv. p. 369. By Mr. O'Kelly and Mr. T. W. 

 Warren I have been favoured with specimens of //. Pisana from this 

 locality. INIy friend R. Callwell, Esq., of Dublin, informs me that this 

 species has been found at another, though not far distant, station, by Mr. 

 Joseph Humphreys, on the North side of the river Boyne, three miles 

 east of Drogheda, and ten North of Balbriggan. Iveragh, Kerry, Mr. 

 Andi-ews. 



H. virgata, Mont. 



In the North, East, and South, this species is found, but in the West I 

 am not aware of its presence. It is a local species, occurs on the marine 

 sand-hills at Ballycastle, in the North of the County Antrim ; Dundalk 

 (County Louth) ; Dublin, Wicklow, Youghal, and Cork ; and at the in- 

 land localities of La Bergerie, near Portarlington, and Ballitore (County 

 Kildare). Finnoe, County Tipperary, Mr. Waller. H. vi)r/ata is one of 

 the species which seems to follow no rule in the choice of its abode or in 

 that of its associates, or rather whose absence from or presence in parti- 

 cular districts cannot be accounted for ; it will be abundant on sea-banks 

 at one place, and for a hundred miles again will not appear in similar 

 localities. Some authors have remarked, from their own accurate observ- 

 ation in particular localities, that it is never found with //. ericetorum ; 

 and Dr. W. H. Harvey, in supplying me with notes of four inland and 

 marine stations in which he had observed it, remarked, " 1 have noticed 

 that this species is never found mixed with H. ericetorum, nor is it generally 

 in the same neighbourhood ; " yet not very far distant from one of those 

 alluded to both species are found in company,* and on the same plant. 



In the collection of T. AV. Warren, Esq., of Dublin, is a very fine series 

 from one locality, Portmarnock, presenting every variety of colour and 



* In Dr. R. Ball's cabinet, and collected by him near Howth off a single 

 plant of Beta marititna, are specimens of a pure white colour, others of a imi- 

 form dark chocolate brown, in addition to the more common state, white with 

 brown bands and the reverse. 



