KEW : SHELLS OF THE LINCOLNSHIRE COAST. 361 



MACTRID.E. 



Mactra solida L. Occasionally; living. 



Mactra subtruncata (DaC). Young; living (B. S. Dodd). 



Mactra stultorum L. Abundant; living. 



Var. cinerea Mont. Common ; living (B. S. Dodd). 

 Scrobicularia prismatica (Mont). Valves (B. S. Dodd). 

 Scrobicularia nitida (Mull.). Valves (B. S. Dodd). 

 Scrobicularia alba (Wood). Common ; living (B. S. Dodd). 



Var. curta Jeff. (B. S. Dodd). 

 Scrobicularia tenuis (Mont). From the drift ; scarce (B. S. Dodd). 

 Scrobicularia piperata (Gm.). 



SOLENIDyE. 



Solen ensis L. Occasionally. 

 Solen siliqua L. 



CORBULID.E. 

 Corbula gibba Olivi. Young shells ; not plentiful (B. S. Dodd). 



MYID.E. 



Mya arenaria L. Common (A. Smith). In 1886 I saw some 

 barge-men at Tetney carrying away a large number of these 

 ' clams,' which they had dug out of the mud-flats adjoining the 

 haven (H.W.K., Naturalist, 1886, p. 347). 



Mya truncata L. 



Mya binghami (Turt). Scarce (B. S. Dodd). 



SAXICAVID.E. 



Saxicava rugosa (L.). Very common. 

 Var. arctica (L.). (B. S. Dodd). 



PHOLADID^E. 



Pholas dactylus L. Mablethorpe (W. Gain, Naturalist, 1884^.31). 



Pholas Candida L. Common. This and the next species may 

 be obtained living by digging during spring-tides. Very large 

 quantities are sometimes thrown up on the beach. 



Pholas crispata L. 



DENTALID.E. 



Dentalium entalis L. Dead ; not plentiful (B. S. Dodd). 



Dec. 1889. 



