Mollusks. 4103 



Lutraria elliptica. General. 

 Tapes decussata. General. 

 „ pullastra. General. 



„ „ var. perforans. Inhabiting the roots of Laminaria. 



„ virginea. Dalkey Sound and Killiney Bay. 

 *Cytherea Chione. An odd valve in Dalkey Sound. 

 Venus casina. Off Dalkey Island. 

 „ fasciata. General. 

 „ striatula. Common. 



„ „ var. gallica. Off Dublin Bay, Dalkey Sound, &c. 



„ ovata. General. 

 Artemis exoleta and lincta. Very fine in Dalkey Sound, and may 

 be found on all the strands after gales. 



Lucinopsis undata. The strands of Portmarnock, North and South 

 Bull, Merrion, &c. 



Cyprina Islandica. General. 



Circe minima. Very rare ; Dalkey Sound. 



Astarte elliptica. Very rare ; Dalkey Sound. 



„ sulcata, and var. Scotica. Scarce ; Dalkey Sound. 

 * „ triangularis. Scarce ; Dalkey Sound. 

 Isocardia cor. Off Skerry Bay. 

 Cardium echinatum. General. 

 „ edule. Common. 



„ fasciatum. Frequent ; Dalkey Sound and Killiney Bay. 

 „ nodosum. Ditto ; ditto. 

 „ Suecicum. Very rare ; off Dublin Bay. 

 „ Norvegicum. General. 

 Lucina borealis. Fine, and frequent. 

 „ spinifera. Rare ; off Dublin Bay. 



„ flexuosa. Rare ; Portmarnock, Merrion, and other strands, 

 and Dalkey Sound. 



*Montacuta bidentata and *ferruginosa. Portmarnock Strand. 

 Kellia suborbicularis. Dalkey Sound, &c. 

 *Lepton squamosum. Dalkey Sound, &c. 

 Mytilus edulis. Common. 



„ „ var. pellucidus. Occasionally. 



Modiola modiolus. Common. 

 Crenella discors. Dalkey Sound. 



„ marmorata. Dalkey Sound, Killiney Bay ; and I have 

 observed it frequently at low water. 



Nucnla decussata. Rare ; off Dublin Bay. 



