40 The Irish Naturalist January, 



Scroblcularla alba (Wood). — Single valves frequent in harbour and 

 in dredgings outside. 



Donax vlttatus (Da Costa).— Broken;valves occasional in the harbour. 



The broken shells of this species are a very common ingredient in 



the sea-gull pellets all over the breeding grounds of Larnbay, yet the 



species seems to be quite rare in the island, the shells being probably 



carried over from the feeding grounds on the opposite mainland 



coast at Rush. 



Mactra sollda, Linne. ) , „ . , . 



-_ „ . ,~ ~ f Immature valves occasional in harbour. 



IW. subtruncata (Da Costa). > 



IW. stultorum, Linne. — One valve in harbour. 



Venus cxoleta, Linne. ^ siugle yalves frequenl in the harbour and 



V. lincta, Pulteney. f in dred ^ from outside it 



V. galllna, Linne. J 



V. fasciata (Da Costa). — Three living specimens in Talbot's Bay ; 

 single valves frequent in the harbour. 



V. ovata, Pennant. — Two single valves in harbour, and two in dredg- 

 ings from outside. 



Tapes pullastra r Montagu). — Living at Carrickdorrish ; single and 

 double valves frequent in and near the harbour. 



Cardium echinatum, Linne. — Single valves occasionally in Talbot's 

 Bay and harbour ; two living, immature, dredged off Saltpan Bay. 



C. exiguum, Gmelin. — Several broken valves in harbour. 



C. nodosum, Turton.— Two single valves Talbot's Bay, and in harbour. 



C. edule, Linne. — A few s-ngle valvesin Talbot's Bay and one double 

 north of harbour. 



C. norvegicum, Spengler. V Single valves occasionally in 



Psammobia ferroensis (Chemnitz.) / harbour. 



IYIya arenaria, Linne. — One valve in harbour. 



IYI. truncata, Linne. --One valve in dredgings off harbour mouth. 



Corbula gibba (Olivi).— Single valves frequent in harbour and in 

 Talbot's Bay. Double valves occasionally in harbour. 



Lutrarla elliptlca, Lamarck. — Broken valves frequent in harbour. 



Ceratisolen Iegumen, Linne. — Dredged off Saltpan Bay. 



Solen ensis, Liune. \ 



S. slilqua, Linne. J Fresh valves occasional in harbour. 



Saxlcava rugosa (Linne). \ Frequent, living, at Talbot's Bay and 

 var. arctica, Linne. J Carrickdorrish, and dead in harbour. 



In concluding this first essay at a list of the marine 

 mollusca of Lambay, I wish to acknowledge my indebtedness 

 to Mr. A. R. Nichols and to Dr. G. W. Chaster for assistance 

 kindly given me in the naming of some critical species. 



