248 THE ICE AGE IN CANADA. 



Margarita cinerea, Couthuoy. 



Fossil— Riviere-du-Loup ; Portland. 



Recent— Gaspe ; Labrador ; Rivi6re-du- Loup ; Little Metis ; 

 Murray Bay ; Greenland to New England ; var. striata, Dall, Sitka. 



Cyclostrema [MUlhria) costvlata. Moller. 

 Fossil — Montreal ; Clyde beds ; Uddevalla. 

 Recent — Gaspe ; Arctic seas to New England. 



Cyclostrema Cutleriana. Clark. 



Fossil — Montreal. Rare. 



This is an Arctic and British shell, as yet recognized only at 

 Montreal. 



Turritella erosa. Couthuoy 



Fossil— Labrador ; Riviere-du-Loup ; Montreal ? 



Recent— Little Metis; Murray Bay; Nova Scotia; Greenland to 

 New England. 



Turritella reticulata. Mighels. 



Fossil — Labrador (Packard). 



Recent— Gaspe ; Labrador to Gulf St. Lawrence ; also fishing banks, 

 Nova Scotia (Willis) ; British Columbia. 



My specimens received from Dr. Packard are marked T. costulata, 

 but seem rather to be the above species. 



Turritella acicula. Stimpson. 



Fossil — Rivifere-du-Loup ; Labrador (Packard). 



Recent — Murray Bay ; coast of New England. 



There may be some reason to doubt whether this is not a variety of 

 T. erosa. It is quite possible that the above species should be regarded 

 as Mesalioe. 



Campeloma decisum. Say. { = Paludiim decisa, Sa.y.) 



Fossil — Pakenham Mills, Saxicava sand. 

 Recent — Eastern America generally. 



Valvata tricarinata. Say. 



Fossil — Pakenham Mills, with the preceding. 



Recent — Eastern America generally. 



Jeffreys regards this as a variety of V. piscinalis. 



