Zoology. 191 



Limax mar^inatus, Helix lamella fa, Pupa anglica, J^ertigo 

 substriata, Limncta auricitlaria, and very large SphcBriit/ii 

 corneum, with about twenty other species. 



In Antrim the freshwater species are more local. In the 

 central parts of the county suitable habitats are not so 

 plentiful as in Down, but this is fully compensated for by 

 the fact that the largest lake in Britain (Lough Neagh), with 

 its continuation Lough Beg, and the river Bann from that 

 to the sea, bound the county entirely on the west. For 

 some time past sub-committees of the Royal Irish Academy 

 and Belfast Naturalists' Field Club have been steadily 

 making a survey of Lough Neagh fauna and flora. Several 

 additions to the moUusca of the lough, and indeed of the 

 district, have been made, including Hydrobia (Pabidestrina) 

 Jenkinsi and Sphcerium lacustre, while many interesting 

 forms of common species, including some of Pisidia from 

 deep water (87 feet), have been dredged or collected along 

 the margin. The above, with the sand dunes, which are 

 extensive on some parts of the coast, and the maritime 

 marshes at the heads of estuaries in Lame, Belfast, Strang- 

 ford, and Carlingford Loui^hs, are the main habitats of the 

 L. and F.W. Mollusca of the north-east of Ireland. 



Of the 117 species known to live in Ireland, 96, including 

 59 land and 37 fresh or brackish-water species, are found in 

 Antrim or Down. 



About 25 British species seem absent from Ireland; and 

 4 species — Geomalacus maculosus, Litnncea involuta, Pisidium 

 globulare, and P. hibernicum — found in Ireland, are absent in 

 England and Scotland. 



In the following list Scharff's nomenclature is used as 

 given in his List of the Irish Land and Freshwater Mollusca, 

 1892, and later additions : — 



Land Species. 



Vitrina pellucida, Alitll. Hyalinia crystallina. Mull. 



Hyalinia cellaria, Mull. Arion ater, L. 



H. alliaria, Miller. A. subfuscus, Drap. 



H. nitidula, Drap. A. hortensis, Fer, 



