232 thp: ice age in Canada. 



at Montreal, At Riviere-du-Loup a small thin variety with a strong 

 epidermis and attenuated posteriorly, is found in situ in its burrows in 

 the Leda clay. It is a deep-water variety. Some large specimens 

 in collections from this place, I have reason to believe, are from aboriginal 

 kitchen-middens. 



Pandora {Kennerlia) glacialls. Leach. 



Fossil — Lsda clay-; St. John, New Brunswick (Matthew) ; Saco, 

 Maine. 



Recent —Gaspe (Whiteaves) ; Murray Bay; Labrador (Packard); 

 Little Metis. 



This species, which was at first confounded with Pandora trilineata, 

 is apparently quite distinct, and on the evidence of the hinge would 

 seem to belong to a different genus. Much nearer to Pandora pinna, 

 Mont. ; = P. obtusa Forbes and Hanley. J. F. W. Jeffreys regards 

 these as varieties of P. inequivalvis. 



Lyonsia arenosa. Moller. 



Fossil — Leda clay ; Montreal (rare and small) ; Riviere-du-Loup, 

 common ; Duck Cove, N.B. (Matthew) ; Saco, Maine ; also in Greenland 

 (Moller). 



Recent — Murray Bay, Riviere-du-Loup, Little Metis and Gaspe ; 

 Halifax (Willis); Greenland (Moller); Labrador (Packard). 



Some specimens from Portland are much larger than those from 

 Riviere-du-Loup and Montreal, and Mr. Whiteaves finds individuals an 

 inch long, living at Gaspe. 



Thracia Conradi. Couthuoy. 



Fossil — Saco (Packard). 



Not yet found fossil in Canada, but recent, though rare, in Nova 

 Scotia (Willis) ; and at Gaspe. Abundant and large in Shediac Bay 

 (J. F. W.) Also, though apparently rare, in Labrador (Packard). 



Has probably extended its northern limit to Canada, since the 

 glacial period. 



Macoma Gi'oenlandica. Beck. {Macoma fragilis Fabr. sp. J. F.W.) 



Fossil — Saxicava sand and Leda clay ; Montreal ; Ottawa ; Perth, 

 Ont. ; Pakenham Mills, Cornwall ; Clarenceville ; Upton ; Quebec ; 

 Murray Bay ; Riviere-du-Loup ; Chaudiere Station ; Anticosti ; Upton, 

 P.Q. ; Stormont, Ont. ; Labrador ; Lawlor's lake and Bathurst, N.B. ; 

 Campbellton, P.E.L ; Westbeach, Maine ; Greenland (Moller). 



