8 



The Irish Naturalist. 



January, 



NOTES ON THE MOI.I,USCA OF THE NORTH-EAST 

 OF CO. WICKI^OW. 



BY P. H. GRIKRSON. 



Thk following notes may be of interest, as they add 56 new 

 records for Co. Wicklow to the Census of the British I^and 

 and Fresh- water Mollusca published in 1902. 



The animals were all taken in the months of August and 

 September last year, with the exception of some taken on 6th 

 April last, and are confined to one inch Ordnance Map, 121, 

 except a few which are specially noted. 



I have, as usual, followed Dr. Scharff's nomenclature as 

 given in Irish Naturalist, 1892. 



I have to thank Mr. Chas. Oldham, who has kindly looked 

 through all the specimens, and given me names of the 

 varieties, &c. (with the exception of a few slugs submitted to 

 Mr. R. Denison Roebuck) : — 



Vltrlna pelluclda, Mull,— This widely distributed shell is very 

 common in the Glen of the Downs and Powerscourt Demense. 



Hyallnfa cellaria, Mull. —Very plentiful under stones, &c., Powers- 

 court Waterfall and Enniskerry. 



H. alliai*la, Miller.— Not common. At Powerscourt Waterfall I took 

 var. viridtda. 



H. nitldula, Drap.— Common ; taken at Powerscourt Waterfall, Grey- 

 stones, and Enniskerry. 



H. pui*a, Alder. — Common among damp moss in suitable situations. 

 Glen of the Downs, Bray ; and at Enniskerry I took var. jtitidosa. 



H. radiatula, Alder.— Rather common at Enniskerry, and xslv. viri- 

 descenti-alba at Powerscourt Waterfall. 



H. crystalllna, Mull.— Very plentiful among damp moss and leaves 

 at the Glen of the Downs and Enniskerry. 



H. f ulva, Miill. — Not uncommon in situations similar to the last named ; 

 taken at Powerscourt Waterfall, in Powerscourt. Demense near the 

 House, and near Enniskerry on the Bray road. 



Arlon atcr, L.— Very common. The following varieties noted: — 

 brumua at Greystones ; vars. livida, fasciata and margina'ta at Ennis- 

 kerry. 



A. subfuscus, Drap.— Taken at Powerscourt Waterfall, and var. 



riifofusca at Enniskerry. 

 A. hortcnsis, Fer. — Very common ; taken at Enniskerry and 



Greystones. 



A. cJrcumscriptus, Norniand.— Fairly common among damp leaves, 

 taken near Powerscourt Waterfall. 



