108 THK CANADIAN NATURALIST. [Vol.viii. 



B. DotlOVani, Cray. — Recent, Newfoundland and northern seas. 



— Fossil, B. I'. Rare. A tingle shell with the characteristic 

 ridge on the lower whorl. 



Lacuna neritoidea, Gould. — Recent, Nova Scotia to Long 

 Island Sound. — Littoral to Laminarian. — Fossil St. J. Hare. 

 I mention this species on the authority of Or. A. S. Packard. 



l/unatia heros i Say. — Recent, Labrador to Long [sland Sound, 

 but i scarce to the South of Cape Cod — Littoral. — Fossil, 11. 0. 

 Two small insymmetrica] individuals shewing the result of dwar- 

 fing like a shell of* the same species collected at Quebec by Dr. 

 Dawson. 



//. herotf Say? var. Chalfnefii. A specimen from Benjamin 

 River received from Mr. Chalmers, [f of the species L, heros, it 

 is a strongly marked variety. It is proportionately mnch higher 



than the typical form ; the whorls arc DJOre tumid, and the 



spire more elevated ; the lower part of the pillar lip, which in 

 L. heros is thin below the umbilical opening, is in this specimen 

 thickened and rounded ; the umbilical opening is .smaller than in 

 Say's slull, and there is a strong ridge on the npper margin of the 

 la t, wborl, next the suture. The length of the spire in speci- 

 mens of Ij. heron collected in the Bay of Pundy, when com- 

 pared with that o( the aperture is as 1 to *\\ or 5 ; but in some 

 from Mingen River on the south coast of Labrador the proportion 

 is 1 to 3j : and as the ratio in Mr. Chalmers shell is 1 to "l\ it 

 is probably a high northern variety of this species. Length If 

 inch, breadth \\ inch. 



Natica ajjiitis f Qmelin (clausa I>. & Sow.)— Recent, Green- 

 land to Massachusetts Bay. — Corralline zone. — Fossil, 11. C, K. 

 B., T. II., St. .]., St. A. Common in Hay of Pnndy deposits, 



but more plentiful in those of Bay Chaleur. 



Bela turricula, Montagu. — Recent, Gulf of St. Lawrence to 



Massachusetts Hay.— Coralline. — Fossil, R. C, B. P. Rather 

 Hmall and not common. 



Bela harpularia, Oouthouy. — Recent, range as in the last 

 species.— Laminarian to Coralline. — Fossil, same localities as 

 last. Infrequent. 



Pecten I$landicu$ i Chemnitz. — Recent, Greenland to Long 

 Island Sound. — Laminarian to Deep Sea Coiallinc.- — Fossil, 

 St. John. Plentiful at one locality. 



Pecten tenuicostut, Mighels, (Magella'nicv$ i Lam.) — Recent, 

 Labrador to Massachusetts Bay. — Laminarian to Coralline. — 

 Fossil, St. John. Rare. 



