MARINE MOLLUSCA OF DONEGAL AND DUBLIN. 55 



I gathered it in a subfossil state near Melmore Head, Mulroy, 

 and also a valve, much worn, in the tide. In Donegal Bay I have 

 gathered a single valve. This species occurs along the east 

 coast, and is very common so far to the north as Magilligan, 

 Co. Derry. Once, however, the Foyle channel is crossed, it 

 apparently diminishes exceedingly in its numbers. 



Astarte sulcata, Da Costa. — Dublin : single valves occur 

 occasionally at Howth, Portrane, and Portmarnock, and I have 

 once, in spring, picked up a fresh specimen in the latter place. 

 I have never found any evidence of this species inhabiting the 

 Donegal coasts. 



Venus exoleta, Linn.— Dublin : South Bull and Portmarnock, 

 common. After a heavy gale, about ten years ago, I found numbers 

 alive at the inner end of Portmarnock strand. Derry : fresh 

 specimens at Magilligan. In Galway Bay this species appears to 

 be common. 



V. lincta, Pulteney. — Dublin, frequent on the strands, often 

 quite fresh ; southward I have gathered this shell on Ventry 

 strand, Kerry. Derry : Magilligan, but scarce. 



V.fasciata, Da Costa. — Dublin: Portrane, Howth, South 

 Bull, but not frequent on the shell-beaches. At Portmarnock 

 I have taken fresh specimens. 



V. ovata, Pennant. — Dublin, a single valve at the "Ware 

 Hole," near Drumleck, Howth. 



V. gallina, Linn. — Dublin and Donegal, common, and often 

 thrown up alive. 



Tapes aureus, Gmel. — Donegal : Kinnegar strand, near Bath- 

 mullan, and Inch Island, both in Lough Swilly. Mweelfinn, 

 Sheephaven, not common, but perfectly fresh specimens occur. 

 I have found this also on Ventry strand in Kerry. 



T. virgineus, Linn. — Dublin : South Bull and Portmarnock 

 strands. Donegal: I have seen a single specimen with Mr. Batt, 

 of Rathmullan, which was obtained in Lough Swilly. 



T. pullastra, Montagu. — Dublin, common on all the coasts. 

 Donegal: White strand, Buncrana, Sheephaven, &c, common. 



T. decussatus, Linn. — Dublin : South Bull, and Velvet strand, 

 Portmarnock. Donegal : Kinnegar strand, Lough Swilly, and 

 elsewhere; Inch Island. 



Lucinopsis undata, Penn. — Dublin coasts, frequent. Donegal : 

 White strand, near Buncrana, and Kinnegar, near Rathmullan, 



