234 THE ICE AGE IN CANADA. 



I am not aware where this little shell has been described, nor what 

 is its range. It seems identical with a specimen in Jeffrey's collection 

 labelled Tellina fragilis, Leach, from Spitzbergen. The Pleistocene 

 specimens are larger and better developed than the recent, except some 

 dredged by Mr. Whiteaves on the north shore, and I would infer from 

 this that the shell is Arctic. 



Cyrtodaria siliqua. Daudin. 



Fossil Riviere-du-Loup; Labrador (Packard); Greenland (Moller). 

 I have seen in the Post-pliocene of Canada, only an imperfect and 

 decorticated specimen of the young shell from Riviere-du-Loup. 



Recent Little Metis ; Cape Breton ; Prince Edward Island ; 

 Gaspe ; Gulf of St. Lawrence ; and coasts of Nova Scotia and New 

 England. 



Mactra (Spisula) ovalis. Gould. M. polynema. Stimpson. 



Fossil Boulder clay ; Cape Elizabeth, Maine. 



Recent Little Metis ; Gaspe ; Labrador (Packard) ; also coast of 

 New England. 



I found, many years ago, a few specimens of this shell at a cove 

 where a number of species of marine shells occur in boulder-clay, and 

 it was published in my list of shells from this place in my paper on the 

 Post-pliocene of Labrador, Maine, &c. It is credited by Packard to 

 " Zeeb's Cove," Cape Elizabeth, which may probably be the same place 

 where I procured it. This species has not yet been found within the 

 limits of Canada in the Pleistocene, though this and the related 

 species or variety, M. solidissima, is found living in Labrador, and 

 Matthew records it from upper Leda clay, St John. It has perhaps 

 moved northward since the glacial period. 



Mesodesma (Ceronia) deaurata. Turton. 



Fossil Matane River (Bell) ; Little Metis. I have not seen it in 

 any other locality ; and it occurs only on the lowest terrace, so that 

 possibly it is modern. 



Recent Abundant at Tadoussac ; Little Metis ; and elsewhere in 

 Gulf and River St. Lawrence ; Labrador (Packard). 



This must be a modern species on our coasts ; but according to 

 Wood it is found in the Red Crag of England. 



Venericardia (Cardita) borealis. Conrad. 



Fossil Labrador (Packard). 



Recent Arctic seas to Long Island ; Little Metis, and common 

 throughout the Gulf of St. Lawrence. It would seem to have been 



