of the North of Ireland. 87 



more so "—Thompson (sub L. quadrifasciata) . " Common on Laminarta" — 



Hyndman (sub L. vincta). Abundant in Turbot Bank sand, in a dead state, 

 lacuna puteolus, Turton. 



Apparently rare. Dredged by Hyndman, in a dead state, on tbe Turbot 



Bank, and near Ballygalley Head. Strangford Lough — Mr. S. A. Stewart. 



Bundoran— Belf. Mus. Coll. 

 var. conica. "Co. Antrim (Hyndman)"— Jeffreys. 

 Lacuna pallidula, Da Costa. 



" Inhabits tbe laminarian region in Belfast and Strangford Loughs, and 



chiefly found on the broad fronds of Laminaria dlgitata ; also on oysters ; 



occurs but sparingly ; procured in some quantity at Ballycastle by the Bev. 



Thomas Hincks " — Thompson. "Living, common, on Laminaria' 1 '' — 



Hyndman. Magilligan — Belf . Mus. Coll. 

 Xiittorina obtusata, Linne. 



Abundant on stones and Fuci on all beaches. Hyndman dredged dead 



shells on the Turbot Bank (L. littoralis). " Common around the shores" — 



Thompson (L. Neritoides, Forbes). 

 var. neritiformis. " Captain Brown has given Downpatrick as an Irish 



locality " — Jeffreys. 

 var. fabalis. " I have found it plentifully at Larne in the North of Ireland. 



I believe it represents the young males of the ordinary f orm " —Jeffreys. 

 Xiittorina neritoides, Linne. 



On rocks and stones above high water mark; common. Bundoran — 



Thompson (L. petrcea, Mont.). 

 Xiittorina rudls, Maton. 



Plentiful on stony beaches everywhere. 

 var. saxatilis. " North of Ireland" — Thompson (L. saxatilis). 

 var. jugosa. " Is common on all quarters of the rocky coasts " — Thompson 



(L.jugosa). 

 var. patula. ' ' Living, common, on rocky ground a little below high water 



mark" — Hyndman (L. patula). Is this correct? Jeffreys gives only three 



stations in Britain — Eddystone, Penzance, and Unst. 

 var. tenebrosa. "Although met with on all sides of the coast, it is local" 



— Thompson (L. tenebrosa). It is an estuarine form, and occurs on our 



Zostera banks. Larne Lough— Hyndman. Fair Head— Belf. Mus. Coll. 

 Xiittorina litorea, Linne. 



In the greatest abundance on stones and mud banks. "Abundant round 



the shores of the Island "—Thompson (L. communis, Turt. Br.). 

 var. turrita. Belfast Lough, Mr. S. A. Stewart— Belf. Mus. Coll. 

 Genus Rissoa, Freminville. 



Of this large genus of tiny shells, out of the 25 species which Jeffreys in- 



