PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 293 



The area of the shell bed appears to be about one acre. The Drincipal 

 shells are the foUowiiiir: " ^"^^^'^''^ 



Buccinum pUcosum. 

 Natica heros. 

 Pccten tenuicostatum. 

 Pectcn cardiimi 



VKliTICAL SECTION OF SHELL HEAP 



Mya arenaria. 

 Mytilus. 

 Helix alternata. 



, Oak Bay, New Brunswick, September, IhG9. 

 [Scale i'^.] 



Toj) sod, fiue powdery humns. 



Much decomposed clam shells. 



Fine flat gravel— Ancient beach. 



3. 



Finely comminuted shells: carbonaceous 



matter. 



Clayey humus, nearly pure. 



Fiue shells, white ashes^ 

 carbonaceous matter. 



Finely comminuted shells, 

 carbonaceous matter. 



Shells. 



7. 



Layer of Ecliinua spines. 



Black bed. 



Shells, 



Blackish matter. 



9. 

 10. 



II 

 12. 



Original clay. 



13. 



