1905. Grierson. — Notes 071 the Mollusca of Co. Lo2itJu 2ig 



Ancylus lacustrls, L.— Lough Ballybony (81). Bariiieath ; Lough 



Drumsliallou (82). Beaulieu (92). Not common. 

 Acme lineata, Drap.— East of Inniskeen ; Flurry Bridge (70). 



Omeath (71). Collou (81). Barmeath (type and van a3a) (82). 



Townley Hall (91). Beaulieu (92). Very plentiful at Townley Hall. 



Fairly numerous near Omeath, taken in moss on the north side of 



Ballyoonan mountain, where it was quite exposed ; no trees or 



shelter of any kind growing. 

 Bythlnia tentaculata, ly.— Killany ; Dundalk (70). Ballymascanlon 



(7 i). Ardee ; Darver (81). Anuagassan ; Blackball (82) ; Drogheda 



(91). Beaulieu (92). Very common. 

 Hydrot3la ulvae, Penn.— Dundalk (70-71). Carlingford (71). 

 H. JenklnsI, Smith. — Dundalk (70). Carlingford (71). Drogheda 



(91). Baltray (92). Very plentiful in suitable situations. 

 Valvata plsclnalis, Mull. — Killany ; Dundalk (70) ; Darver; Collon ; 



Ratliescar (81). Annagassan (82). Beaulieu (92). Common. 

 V. cristata, Mull.— Dundalk (70). Ballymascanlon (71). Darver; 



Ardee; Collon (81). Barmeath; Blackball (82). Drogheda (91). 



Beaulieu (92). Fairly common. 

 Sptiaerlum corneum, L.— Dundalk (70). Grange (71). Darver; 



Ardee; Collou (81). Annagassan; Blackball (82). Beaulieu (92). 



Common. 



S. lacustre, Mull.— Killany ; Dundalk (70). Grange (71). Ardee {81). 



Togber ; Blackball (82). Beaulieu (92). Fairly common. 

 Plsldium amnlcum, Miill.— Fane Valley (70). Ardee (81). Common 



in some rivers. 



P. nitldum, Jenyns.— Omeath ; Carlingford (71). Ardee {81). Salters- 

 town (82). Not common. 



P. fontinale, C. Pfr.— Dundalk ; Lough Cortail (70). Carlingford; 

 Grange (71). Ardee; Collon; Rathescar (81). Salterstown ; Bar- 

 meath ; Blackball (82). Drogheda (91). Beaulieu (92). Common. 



P. milium, Held.— East of Inniskeen; Lough Cortail ; Dundalk (70). 

 Carlingford ; Grange (71). Ardee (80- Salterstown ; Lough Drum- 

 shallon (82). Drogheda (91). Beaulieu (92). Common. 



P. obtusalc, C. Pfr.— Dundalk (70). Ardee (81). Blackball (82). Not 

 common. 



P. puslllum, GmeL-Dundalk (70). Carlingford (71). Ardee (81). 

 Lough Drunisballon (82). N. of Townley Hall (91). Beaulieu (92). 

 Fairly common. 



Unio margarltlfcr, L.— Kilcurry River (70). Very plentiful in this 



river, and is also to be found in the Falmore river. 

 Anodonta cy&nea, L.— Lough Corradoran (70). This shell is difficult 



to get ; there are few natural lakes near the limestone area of Co. 



Louth, and the margins are too boggy to reach the edges. They are 



reputed to be in Lough Ballybony (81), but I could not get near the 



lake or obtain a specimen from it. 



Clondalkin. 



