250 THE ICE AGE IN CANADA. 



B. Vahlii of Beck. According to Dr. Carpenter the species is 

 an uncertain one, having apparently varieties connecting it with 

 B. harpularia, B. bicarinata, and B. violacea. 



Bda turricula. Montagu. 



Fossil Montreal ; Riviere-du-Loup ; Labrador ; also Red Crag and 

 Uddevalla (Jeffreys). 



Recent Little Metis ; Gulf of St. Lawrence and coast of Nova 

 Scotia and New England. 



I include under this name B. nobilis of Moller ; B, Americana, 

 Packard ; B. scalaris, Moller ; B. exarata, Muller, Morch ; and 

 B. angulata, Reeve. The var. nobilis is found at Montreal and Gaspe ; 

 also young shells not distinguishable from exarata. Var. scalaris, 

 occurs at Riviere-du-Loup and Labrador. This shell is a widely- 

 diffused and somewhat variable northern species. Mr. Whiteaves, 

 however, regards B. nobilis, B. exarata, and B. scalaris as distinct. 



Bela Trevelliana. Turton. 



Fossil Riviere-du-Loup ; Labrador ; also Clyde beds and Norway 

 (Jeffreys). 



Recent Little Metis; Riviere-du-Loup; Murray Bay; Arctic seas, 

 and Greenland to Massachusetts. It is probably B. decussata of 

 Couthuoy. B. excurvata (Carpenter), from Puget Sound, may prove 

 another variety. British Columbia, according to Whiteaves.* 



Bela violacea. Mighels and Adams. 



Fossil Montreal. 



Recent Little Metis ; Riviere-du-Loup ; British Columbia ; 

 Murray Bay ; Labrador (Packard) ; Gaspd (Whiteaves) ; Fishing 

 banks Nova Scotia (Willis) ; Massachusetts (Stimpson). Possibly 

 B. bicarinata of Couthuoy. 



Bela cancellata. Mighels and Adams. 



Fossil Little Metis ; Murray Bay ; Labrador (Packard) ; Casco 

 Bay (Gould). This shell may be B. impressa, Beck. In any case the 

 fossils are identical with the modern Murray Bay specimens. It also 

 occurs living in Gaspe Bay (Whiteaves). 



* Whiteaves doubts whether the true Bela turricula or the 

 B. Trevelyana have been found in the St. Lawrence. 



