246 THE ICE AGE IN CANADA. 



Planorhis hicarinatns. Say. 



Fossil— Pakenham Mills, Saxicava sand. 



Planorhis trivolvis. Say. 



Fossil — Pakenhiim Mills, Saxicava sand. 



Planorhis parvus. Say. 



Fossil — Pakenham Mills, Saxicava sand. 



All of the above pulmonates are modern Canadian species, and seem 

 to have been drifted by some fresh-water stream into the sea of the 

 Saxicava sand and Leda clay. 



Siphono-dentalium vitreum. Sars. 



Fossil — Leda clay, Murray Bay ; also Norway (Sars). 

 Recent— Gulf of St. Lawrence (Whiteaves) ; coast of Norway (Sars). 

 It is a rare deep-water shell. 



Amicula [Stimpsonella) Emersonii. Couthuoy. 



Fossil— Montreal. (Plate I., Fig. 10.) 



Recent —Murray Bay ; Little Metis ; Riviere-du-Loup ; Halifax ; 

 coast of New England. 



My specimens are merely detached valves. They indicate an 

 animal quite similar to specimens from Halifax referred to this species, 

 but differ slightly from specimens from Murray Bay. Dr. Carpenter 

 has labelled the drift form var. " altior.'^ The differences among the 

 recent specimens, as well as the fossil valves, are discussed in the 

 "Contributions to a Monograph of the Chitonidse," prepared by Dr. 

 Dall partly from Dr. Carpenter's notes, and printed by the Smithsonian 

 Institution. 



Puncturella {Cemoria) noachina. Linn. 



Fossil — Quebec; Riviere-du-Loup; Clyde beds. 



Recent— Little Metis ; Gaspe ; Murray Bay ; Labrador ; Gulf St. 

 Lawrence generally; and throughout the Arctic seas and North 

 Atlantic. 



Acmcea testuclinalis. Moller. 



Fossil— Labrador. 



Recent — Tadousac ; Little Metis ; Riviere-du-Loup ; Murray Bay ; 

 Gasp^ ; Pictou ; Gulf St. Lawrence generally ; and throughout the 

 Arctic seas and North Atlantic. 



