173 



fax, by Willis, in 1857 ; but Sir J. W. Dawson, writing in 1871, says, "it 

 occurs abundantly and of large size off different parts of the coast " of Prince 

 Edward Island "as it does also on the opposite shore of Nova Scotia, where 

 I have collected the species more than forty years ago."* Abundant in the 

 waters of the Charlotte County coast, N.B. (Ganong). Souris and Charlotte- 

 town, P.E.I., (Whiteavea). Miss Bush includes the name of this species in 

 her list of the Labrador mollusca obtained by the Steam's expedition in 

 1882,"y and adds that it is " very rare at so northern a latitude." 



It is still doubtful whether this is an indigenous species or one introduced 

 from Europe, but the balance of evidence would seem to be in favour of the 

 latter hypothesis. 



Lacuna neritoidea, Gould. 



Grand Manan Island (Verrill); Greenland (Moller, as Lacuna pallidula). 

 If this shell is the same as the Xerita pallidula of Da Costa (1778), as 

 stated by Moller, G. O. Sars, and Tryon, it should be called Lacuna pallidula 

 (DaCosta). 



Lacuna vincta (Montagu). 



Trochus divaricalus, O. Fabricius (1780) ; non Linne. 

 Turbo vinctus, Montagu (1803). 

 Lacuna vincta, Turton (1827) ; et auct. 

 Lacuna divaricata, Loven (1846) ; et auct. 



Grand Manan Island. " The variety common here is strong, broad, pale 

 brown, with one white band under the suture " (Stimpson). Very abundant 

 in the Bay of Fundy (Verrill) ; Annapolis Basin (Verkruzen). Fishing 

 banks off Halifax, common (Willis) ; whole coast of Nova Scotia (J. M. 

 Jones). Gaspe Bay, very common on fronds of Laminaria (Sir J. W. Daw- 

 son) and on sea weeds in shallow water (Whiteaves) ; Anticosti (Verrilh 

 Whiteaves, and Macoun); whole coast below Rimouski (Bell); Caribou 

 Island, where the " plain and banded varieties were common " (Packard). 

 Square Island, Atlantic coast of Labrador, in 30 fathoms (Packard) ; com- 

 mon on the north shore of the strait of Belle Isle, at Forteau Bay, 20 fathoms, 

 and at L'Anse au Loup in 8-15 fathoms ; also on the Atlantic coast of 

 Labrador, at Fox Harbour, St. Lewis Sound, in 1 to 4 fathoms, and at Dead 

 Island, near Square Island, in 1 to 4 fathoms, Stearns expedition (Miss 

 Bush) ; Atlantic coast of Labrador, between Sandwich Bay and Hamilton 

 Inlet, 1894, and Davis Inlet, 1896 (Low). 



* Report of the Geological Structure and Mineral Resources of Prince Edward 



Island, p. 50. 

 t Proceedings of theU. S. National Museum, vol. vi. (1883), p. 240. 



