KEW: SHELLS OF THE LINCOLNSHIRE COAST. 359 



other specimens, one imbedded in a matrix of limestone conglomerate, 

 the presumed recent origin of the shell was considered untenable, 

 and Mr. Marshall now agrees with Mr. Etheridge, to whom speci- 

 mens were 'sent, that it is Terebratulina striata D'Orb., a cretaceous 

 fossil (Journal of Conchology, v. 278). 



ANOMIID.E. 



Anomia ephippium L. 



OSTREID^E. 



Ostrea edulis L. Very common. Large beds are kept in the 

 Humber, and with the American oysters placed there Crepidula 

 fornicata is introduced, but it does not appear to live long. 



PECTINID^E. 



Pecten pusio (L.). Valves (B. S. Dodd). 

 Pecten varius (L.). Common ; mostly valves. 



Var. nivea Macg. Near Chapel, in good condition (B. S. Dodd). 

 Pecten opercularis (L.). Common ; mostly valves. 



Var. lineata DaC. Valves (B. S. Dodd). 

 Pecten tigrinus Mull. Valves ; not plentiful (B. S. Dodd). 

 Pecten maximus (L.). (B. S. Dodd). 



mytilid^:. 



Mytilus edulis L. Abundant; living. 



Var. pallida Marsh. Dead shells, in good condition (B. S. Dodd). 

 Mytilus modiolus L. 



Mytilus barbatus L. Not plentiful (B. S. Dodd). 

 Modiolaria marmorata (Forb.). Two valves found (B. S. Dodd). 

 Modiolaria discors (L.). Young living specimens taken (B. S. 

 Dodd). 



ARCID^E. 



Nucula nucleus (L.). Common ; a great favourite with visitors 

 to the sea-side because of the iridescence of the inside of the 

 shell. 



Leda minuta var. brevirostris Jeff. A few dead shells found 

 (A. Smith). Tolerably plentiful in dredgings from Lynn Deeps 

 taken by H.M.S. Porcupine, when on survey (J. T. Marshall). 



Pectunculus glycymeris (L.). (B. S. Dodd). 



Area tetragona Poli. Valves ; not plentiful (B. S. Dodd). 



Dec. 1889. 



