Stelfox — List of Laud and Freshtvater Mollusks of Ireland. 135 



Physa sp. — A few specimens in one of the small tanks at Glasnevin. These 

 are, according to Mr. Standen, similar to specimens of Physa rjyrina Say, also 

 an American species. 



Physa sp. — Common in the lilj'-tank at Oastlewellan. Quite a small 

 species. 



Physa sp. — Common in the lily-tank at the Botanic Park at Belfast, where 

 Mr. Phillips first took it in 1909. It is still common there, although this 

 tank is dried and carefully cleaned every spring, the cleaning process taking 

 about a fortnight's time. 



Planorbis corneus L. — Believed to have been introduced with water-plants 

 into an artificial pond at Markree Castle, Sligo, hut future research may 

 possibly prove it to be native. 



Pomatias elegans Miill. — Fiecorded by Eev. B. W. Adams in the British 

 Association Guide to the Dublin District m 1878, as being found at Glasnevin. 

 Perhaps a temporary introduction. 



An instance of the means by which shells are imported into this country 

 may be interesting. When visiting Mr. P. LI. Praeger recently in Dublin, 

 I obtained the "shakings" of moss used by German horticulturists when 

 sending him plants. In this material I obtained the following species : — 



From Erfurt in Germany :- 



Vitrina j)dlucida j\Iiill. 

 Hyalinia alliaria Miller. 



„ radiatula Alder. 



„ pura Alder. 

 E'uconidus fv.lvus Miill. 



Pinidum p)Tjgmaeum Drap. 

 Acanthinida acidcata Miill. 

 Cochlicopa lubrica Miill. 

 Caecilioides acicida Miill. 

 Vertigo pusilla Miill. 



From Lindau in Bavaria :— 



Vitrina sp. (hroken). 

 Hyalinia alliaria. IMiller. 



„ radiatida Alder. 



„ pura Alder. 



Hygromia sp. (too young to name). 

 CocMicopa lubrica Miill. 

 Succinea sp. (broken). 



The majority of these shells were undoubtedly living when they readied 

 this country, and if the moss containing them had been placed in some damp 

 situation, I ha^'e little doubt that some of them would have become naturahzed. 

 Mr. Praeger informs me that after arrival in Ireland this moss is often \ised 

 for re-packing, and sent to various parts of the country : so that mollusks thus 

 imported may acquii'e quite a wide dissemination. 



