172 MILNE: ON IRISH MOLLUSCA. 



Ballyshannon, Donegal (sea-level, carboniferous limestone), 

 , very numerous on sea-wall. Dromod, Leitrim (150 ft. alt., 

 carboniferous limestone), numerous in ivy on a bridge, 

 Roosky, Leitrim (130 ft. alt., carboniferous limestone), a 

 few in a hawthorn hedge. Belturbet, Cavan (200 ft. alt, 

 carboniferous limestone), several on stone walls. 



H. hispida. — Armagh, Armagh (200 ft. alt., carboniferous 

 limestone), plentiful in quarry. Carson's Bridge, Monaghan 

 (230 ft. alt., carboniferous limestone), everywhere on banks 

 of Ulster Canal. Smithborough, Monaghan (250 ft. alt, car- 

 boniferous limestone), numerous in cutting of canal. Crom 

 Castle, Fermanagh (180 ft. alt., carboniferous limestone 

 with alluvium), common among debris by Upper Lough 

 Erne. Rossclare Bay, Fermanagh (150 ft alt, old red 

 sandstone), very common among stones on shore of Lough 

 Erne. Edmondstown, Mayo East (200 ft. alt., carbonifer- 

 ous limestone), plentiful on walls in the demesne. Rath- 

 keery, Rosscommon (250 ft. alt., carboniferous limestone), 

 on walls by roadside. Dromod, Leitrim (150 ft. alt., 

 carboniferous limestone with peat), a few among stones in 

 fields. Roosky, Leitrim (130 ft. alt., carboniferous lime- 

 stone), plentiful by R. Shannon. Belturbet, Cavan (200 ft. 

 alt., carboniferous limestone), a few on walls. 



H. concinna. — Ballymore, Rosscommon (400 ft alt., car- 

 boniferous limestone), several in the fields. 



H. rotundata. — Armagh, Armagh (200 ft. alt., carboniferous 

 limestone), numerous in quarry. Rossmore Castle, Monaghan 

 (300 ft. alt., carboniferous hmestone), one young specimen 

 in demesne. Smithborough, Monaghan (250 ft alt, 

 carboniferous limestone), a few in cutting of Ulster Canal. 

 Newtownbutler, Fermanagh (200 ft alt, carboniferous 

 limestone), several, Drumcru Bridge. Rossharbour, Fer- 

 managh (170 ft. alt, carboniferous limestone), plentiful in 

 ruins of a cottage. Edmondstown, Mayo East (200 ft 

 alt., carboniferous limestone), a few in the demesne. 



J.C., vi., Jan., 1S90. 



