1908. Notes. 23 



Exotic Land Mollusca at Belfast. 



Ten years ago J. Ray Hardy, Manchester Mnseuni, sent me specimens 

 of Opens GoodaUi, Miller, with the remark that I shonld be sure to find 

 specimens in some of the old greenhouses in the north-east. Though I 

 have searched greenhouses in many parts of Ireland since, I never found 

 the species till this year. In April I was hunting for the rare tiny Rosy 

 Woodlouse in the palm bed at Crawford's Nursery when I found five or 

 six specimens of the Opeas alive and dead on the surface of the soil. A 

 few months later A. W. vStelfox came with me to the nursery again and 

 we found a large number, well on to a hundred, alive and dead, of O- 

 Goodalli and Suhidina octona, Chemnitz, another and larger species of the 

 Stenogyridae. Dead specimens of the latter are easily mistaken for 

 Cochlicopa lubn'ca, if not full grown. Alive there is no chance of this, as 

 the animal is a bright greenish yellow, and shows very markedly through 

 the transparent shell. Eggs in many also showed clearly through shells 

 and R. Standen tells he has had specimens from Manchester green-house^ 

 packed full of eggs. Both are West Indian species, and are supposed to 

 have been introduced to the British Isles with plants. The species are 

 very difficult to determine, as thej' are numerous and very much alike, 

 and there may be a third species among those we collected. Mr. Standen 

 kindly helped me in the identification of the Subulina. 



In the same palm bed were other foreign animals, including several 

 woodlice, cockroaches, a spider or two, and a very tiny ant, which I have 

 forwarded to Dublin Museum to be worked out when time permits. 



R. Wei^ch. 

 Belfast. 



Mollusca of Bushy Park, Dublin. 



In this Journal, June, 1904, we gave a list of the mollusca living in the 

 marsh at Bushy Park. Valvata cristata, which was common in the pond 

 below the house and also lived in the marsh, was omitted by mistake. 

 This year we find that Liniax ??targinatus, whose seeming absence we 

 commented on, does occur, living on old trees near the garden. The 

 upper part of the marsh, in which the bulk of the small species was 

 obtained, has now been entirely altered by a drain opened out to the 

 Dodder, and the removal of the stone-heaps to build rockeries ; and we 

 find some of the xerophiles have now come down from the dry bank 

 between the marsh and the river, and are feeding where three years ago 

 we collected the Pisidia and Aplexa hypnoritm. We mention this fact, as 

 any one now visiting the marsh might easily fail to find the species we 

 listed, unless they have partly migrated to the lower end, which still 

 remains undrained. It was, however, not as good collecting ground as 

 the upper half. The pond near the house, too, as a habitat for mollusca 

 has altered through the introduction of swans. 



A. W. SteIvFOX. 



Belfast. ■ R. WeIvCh. 



