4102 Mollusks. 



Lyonsia Norvegica. Dalkey Sound and Killiney Bay, in about 10 

 fathoms. 



Thracia convexa. Very rare : trawled off Skerry Bay. 

 „ distorta. Rare ; Dalkey Sound. 



„ phaseolina. The strands of Merrion, Salthill, &c. ; Dal- 

 key Sound, in about 9 fathoms. 



„ villosiuscula. Dalkey Sound, at the same depth. 

 Cochlodesma praetenue. Very rare ; Dalkey Sound, Killiney Bay. 

 Solen ensis. Common. 



„ „ var. magna. Occasionally with the common form. 

 „ marginatus. Rare, but obtained on all our sandy beaches. 

 „ siliqua. Common. 



„ pellucidus. Occasionally driven ashore, but may be taken 

 fine, and in some numbers, with the dredge, in 12 fathoms, Killiney 

 Bay. 



Solecurtus coarctatus. Rare ; Skerry Bay. 



Ceratisolen legumen. Not common, but may be found on all our 

 sandy beaches. 



Psammobia Ferroensis. General. 



„ tellinella. Dalkey Sound and Killiney Bay. 



Tellina crassa. Scarce ; Dalkey Sound. 



donacina. Same locality as the preceding species, 

 fabula. General, 

 tenuis. Common, 

 solidula. Common. 



incarnata. Rare ; Blackrock, Salthill, and Portmarnock 

 Strands. 



„ pygmsea. Very rare ; Dalkey Sound. 

 Syndosmya alba and prismatica. Both very fine from the stomachs 

 offish. 



Scrobicularia piperata. Inhabiting the mud-deposits at the mouth 

 of the Liffy. 



Donax anatinus. General. 



Mactra elliptica. Dalkey Sound, and also obtained from the sto- 

 machs of fish. 



„ solidula. Common. 

 „ stultorum. Common. 



„ „ var. cinerea. Portmarnock Strand. 



„ subtruncata. Merrion Strand ; I have also observed it on 

 the South Bull. 



,, truncata. Rare ; in the same localities. 



