232 THE ICE AGE IN CANADA. 



at Montreal. At Rivic re-(lu-Li)iip a siniU thin variety with a strong 

 epidermis ami attenuated posteriorly, i.s found in siln mi its burrows in 

 tlic Leda elay. It is a deep-water variety. Sonic large speciuiens 

 in collections from this place, I liave reason to believe, are from aboiiginal 

 kitchen-middens. 



I'aivlom (Ki>nn< rlia) ij/((ri((/i^. Leach. 



Fossil — Leda clay; ,St. John, New lirunswick (Mattiicw) ; Saco, 

 Maine. 



Recent —(iaspL- (Wliiteaves) ; Murray Ray; Lilirador (Packard); 

 Little Metis. 



Tiiis species, wliicii was at first confounded witli l^amlora triliiienta, 

 is apparently (|uitc distinct, and on tlie evidence of the hinge would 

 seem to belong to a ditlerent genus. Mucli nearer to /'(iiu/ont filiiixi, 

 Mont. ,• = /'. ohtiiML Forbes and Hanley. d. F. \V. detlVeys regards 

 these as varieties of /'. 'iinqnirdlfia. 



Lyonnid (irenoxa. Miiller. 



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

 common ; Duck Cove, X.R. (Matthew) ; Saco, Maine ; also in (Greenland 

 (M.iller). 



Recent —Murray T. ly, Riviere-du-Loup, Little Metis and <{aspe: 

 Halifax (Willis) ; (ireenland (^^'^ller) ; Lal)ra<Ior (Packard). 



Some specimens from Portland are much larger than those from 

 Rivii're-ilu-Loup and Montreal, and Mr. Wl'.iteaves finds individuals an 

 inch long, living at (iaspe. 



Thr(t<:i(t Conrdill, Couthuoy. 



Fossil — Saco (Packard). 



Not yet found fossil in Canaila, 'nut recent, though rare, in Nova 

 Scotia (Willis); and at (Iaspe. Abundant and largo in Sliediac liay 

 (J. P. W.) Also, thougli apparently rare, in Labrador (Packard). 



Has probably extended its northern limit to Canada, since the 

 glacial period. 



Macoma Ova-nhindlfd. Reck. (Macoma fnujUin Fabr. sp. J. F. W.) 



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

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

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

 VAi. ', Stormont, Ont. ; Labrador ; Lawlor's lake and Rathurst, N.B. ; 

 Campbellttm, P.E.I. ; Westbeach, Maine ; Greenland (Mrdler). 



