106 THE ZOOLOGIST. 



S. piperata, Bellonius. — Donegal : Doagh Estuary, Sheep- 

 haven, and Inch Island, Lough Swilly, abundant. Dublin: a 

 single valve at Portrane; on recently deposited mud between 

 Baldoyle and Portmarnock, where it does not seem to have been 

 known till lately, and is now frequent. Always on muddy ooze. 



Ceratisolen legumen,IAnn. — Dublin coasts, common. Donegal, 

 frequent on the Lough Swilly shores, and I have gathered it 

 westwards near Horn Head, and elsewhere. 



Solen ensis, Linn. — Dublin and Donegal, frequent. 



S. pellucidus, Pennant. — Dublin: Portmarnock and North 

 Bull, but not common. Donegal : frequent, especially westwards, 

 about Dunfanaghy and Breaghy. 



S. siliqua, Linn. — Dublin and Donegal, abundant. 



S. vagina, Linn. (S. marginatum). — Donegal, one specimen 

 (perfect) was picked up by me on the Kinnegar strand, Lough 

 Swilly. It has been stated that this shell occurs at the North 

 Bull, but I never found it there, though I have repeatedly sought 

 for it. A search is, however, never satisfactory, as it cannot be 

 distinguished without some slight examination from the common 

 razor, and the abundance of the latter may often conceal the 

 rarer one. 



Lyonsia norvegica, Chemnitz. — Dublin : formerly found on 

 Portmarnock strand (Miss Willan). Derry : Magilligan (Miss H. 

 Galway). Donegal : I gathered a single fresh valve on the White 

 strand, Buncrana, Lough SwilJy, and a broken one on Ballina- 

 stocker, in the same Lough. 



Thracia papyracea, Poli. — Dublin : formerly common on the 

 Velvet strand, Portmarnock (Miss Willan) ; one specimen there, 

 1881. Donegal: Abundant on the Kinnegar, Lough Swilly, and 

 frequent elsewhere on Donegal coasts. Derry: Magilligan (Miss 

 H. Galway). Var. villosiuscula, one specimen at Portmarnock. 



Corbula gibba, Olivi. — Dublin and Donegal, frequent. 



Mya arenaria, Linn. — Dublin: Howth, &c. Donegal: Inch 

 and Buncrana, Lough Swilly. 



M, truncata, Linn. — Dublin and Donegal, frequent. 



Saxicava rugosa, Linn. — Dublin : abundant in the limestone 

 near the village of Howth, and elsewhere. Donegal, frequent. 

 Var. arctica, N. Bull, Dublin ; Mweelfinn, Sheephaven, Donegal. 



Pholas dactylitis, Linn. — Dublin : Portmarnock, a single valve. 

 Donegal: Kinnegar, liatlnnullan (Mrs. Batt). 



