^72 The Irish Naturalist. vSeptember, 



I.AND AND FRESH-WATKR MOLLUSCA. 



BY A. W. STELFOX, A.R.I.B.A., AND R. WELCH, M.R.I.A. 



Little work remained to be done in this branch of zoology; 

 indeed few districts have received better and closer attention 

 than that in which the sixth Conference was held. R. Welch's 

 notes in the Irish Naturalist, vol. xv., p. 67, included good 

 lists from Rosguill and Sheep Haven areas, with several re- 

 cords from other neighbouring places, such as Doe Castle, 

 lyOugh Salt, and Doaghmore in Fanad. Unlike the last Con- 

 ference, onl}^ two conchologists were in attendance, and the 

 weather being ot the usual '' Field Club " variety, militated 

 against many fresh discoveries. Everywhere on the mainland 

 shells were few and far between, and it was only on Tory 

 Island, where the cliff slopes were drenched with a heavy 

 mist, that any abundance of moUuscan life was noted. 



Taking the various places in the order visited : Doe Castle 

 and its surrounding furnished a fair list of land species, with 

 one brackish- water one, viz., Hydrobia nlvac Slugs were 

 particularly common under some fallen trees west of the 

 castle, under one of which a large specimen of Limax flavus 

 was taken, being the first record of this species for the west 

 division of Donegal. Amalia Sozuerbyi was also observed here, 

 with an abundance of Arion subfuscus. In the graveyard the 

 large western form oi Hyalinia ccllaria was collected, juvenile 

 specimens being seen in great abundance. If we are to trust 

 specimens in the Dublin Museum named by Dr. Westerlund, 

 this form is known on the continent as Hyalinia cellaria var. 

 sylvatica, Morch ; and it is the shell described in 1908 by Mr. 

 A. S. Kennard, F.G.S., as l/itrea {Hyali7iia) hibeinica. Speci 

 mens from this and other Irish localities were frequently mis- 

 taken in the past for Hyalinia Draparna^idi, a species practi- 

 cally confined to the southern and eastern counties in this 

 country. Passing to the Rosguill peninsula, where our second 

 day in the open was spent, time prevented us from visiting 

 perhaps the best habitat, namely the slopes oi Ganiamore ; 

 these slopes include patches of rough talus with a fairly rank 

 vegetation, and, as already proved, shelter an interesting 

 fauna. At Melmore Head, the extreme north of the penin- 

 sula (which latter is really four islands connected to each 

 other and the mainland by sand-flats), A^riolimax agrestis, 



