134 Proceedings of the Roi/al Irhh Academy. 



Hyrgomia rufeseens Pennant. — Introduced with EcUceUu vinjata at 

 Magheramorne, in Antrim. 



This species has made its appearance in many gardens in the north, 

 and is now recorded for all the Ulster coimties, though iu the time of William 

 Thompson it was apparently quite unlmown north of Banbridge, in Down. 

 How much of this extension of its range is due to legitimate migration, and 

 how much to importation with plants, &c., it is impossible to say ; and I have 

 thei'efore recorded it in the list for all the Ulster divisions, though it 

 appears to have been only recently naturalized in most of them. 



Helix pisana Mijll. — Imported into Belfast with bananas. 



H. limbata Drap.— A single living specunen was taken by the writer 

 some years ago in Dickson's Nursery at Belfast. No example seen since. 



General Distribution. "Wideh' distributed in France and occurs in Spain. 



Hemicycla (Helix) guanartemes Grass. — Also obtained in Belfast, in im- 

 ported bananas, by Mr. Green. WoUaston gives many interesting notes on 

 this species in his Testaeea Atlantica, p. 364. 



General Distribution. — Confined to Grand Canary, with allied species in 

 tlip island of Teneriffe. 



Carychium minimum Miill. — A form difiering from our native specimens is 

 common on the outside of damp pots iu some of the houses at Glasue^'in and 

 Castlewellan. Associated in the former place with the species of Limnaea 

 mentioned below. 



Subulina octona Chemnitz. — Abundant in several greenhouses in Belfast, 

 Glasnevin, and Castlewellan. Usually associated with the next species. 



General Distribution. — 'J'ropical Ameiica and reported from tropical Africa 

 and Madagascar. 



Opeas goodalli Miller. — Has been found in all greenhouses from which the 

 last species has been obtained, except those at Castlewellan. 



General Distribution. — "West Indies. 



Limnaea sj). — A small species is verj- abundant at Glasnevin, on the 

 outside of damp pots in the Fern-house. In many ways this shell resembles 

 the small western Irish form of Z. fruncatula ; but no authority to which I 

 have sent specimens has eared to say definitely that it is that species. Its 

 colour, which is a clear, transparent yellow, is quite unlike that of any 

 examples of Z. iruncatula I have seen. 



Physa s/). — Common in the lily-tank at Glasnevin, and recorded by 

 'Slv. Green as Physa acuta Drap. In a group like that of tlie I'hysae it is 

 practically impossible to give an imported species a name, imless one has 

 some idea as to the origin of the specimens. Mr. Standen has kindly compared 

 this shell with those in the Manchester Sluseum, and has written to me that it 

 is practically identical with examples oi Physa gabbi Tryon, from Oregon, U.S.A. 



