JONES — MOLLUSCA OF NOVA SCOTIA. 325 



Margaritana arcuata, St. Fresh water lakes and streams. 

 Anodon implicata, Gould. Inland lakes ; rare. ( Willis.) 



Fam. Mytilid^e. 

 Mytilus, edulis,L. 



var, pellucida. All rocky shores. 

 Modiola modiolus, Turt. All rocky shores. 

 M. plicatula, Lam. Northern coast. ( Willis). 

 Modiolaria nigra, Loven. Halifax harbour. 

 M. discors, Beck. Halifax harbour. 

 M. corrugata, Morch. Halifax harbour. 

 Crenella glandula, Ad. Halifax harbour. ( Willis). 

 G. nigra. Northumberland Strait, off Pictou Island. (White- 

 aves). 



Fam.. Pectenhle. 



Pecten tenuicostatus, Migh and Ad. Whole coast. One in my 

 collection, presented by the late Mr. Willis, measures over 6^ in. 

 P. islandicus, Chemn. Whole coast. 

 P. irradians, Lam. Sable Island. (Willis). 

 P. pwstulatus. LaHave bank. ( Willis). 



Fam. Ostr^eid^. 



Ostroea virginiana, List. Northern coast. 

 Anomia glabra, Verrill. Halifax harbour Off Cape Sable, 

 8 fath. (Verrill). 

 A. aculeata, Gmel. 

 A. electrica, L. 

 A. squamula, L. 



CLASS B^ACHIOPODA. 



Fam. TEREBRATULID.E. 



Terebratulina septentrionalis, Couth. I have found this 

 species very abundant in one particular part of the harbour ; adult 

 and young, in all stages of growth together, generally much cover- 

 ed by a sponge ; 10 fath. 



