150 



As a fossil, S. rugosa is exceedingly abundant in the Pleistocene deposits 

 of Maine, New Brunswick, and the valleys of the St. Lawrence and Ottawa 

 rivers. It has also been found in similar deposits at a few localities in 

 TJngava, northern Ontario, Keewatin, and on Vancouver Island. At Ungava, 

 it has been collected by Bell on the east coast of Hudson Bay, two or 

 three miles up Little Whale River, in 1877 ; and in northern Ontario, at 

 Mill Point, near Moose Factory, James Bay, in 1875. In Keewatin it has 

 been collected at the Limestone Rapids of the Fawn Branch of the Severn 

 River, by Mr. Low, in 1886 ; and at Gluttony Bay, Baker Lake, at the head 

 of Chesterfield Inlet, by Mr. D. T. Hanbury in 1900. 



S. rugosa, also, is said to occur in the Miocene, Pliocene and Pleistocene 

 of Europe, and, according to Sir J. W. Dawson, it is " relatively much more 

 abundant in the drift deposits" of the provinces of Quebec and Ontario, 

 ' than in the Gulf of St. Lawrence at present." 



Cyrtodaria siliqua, Daudin. 



Mya siliqua. Chemnitz (1795). 



Glijcimeris siliqua, Lamarck (1819) : and Gould (1870). 



Fishing banks off Halifax, common (Willis) ; Halifax Harbour and Sable 

 Island beach, dead specimens (J. M. Jones) ; Bradelle Bank, — and in 

 stomach of cod caught on the Miscou Bank (near the mouth of the Bale des 

 Chaleurs) one fresh and perfect specimen with the animal (Whiteaves) ; 

 Gaspe Bay, in stomachs of cod (Sir J. W. Dawson); Rimouski and Marsouin 

 (Bell) ; and near Caribou Island, in from 15 to 50 fathoms, mostly on hard 

 bottomr^ (Packard). 



Panop.ea (Panomya) Norvegica, Spengler. 



Mya Norvegica, Spenglei- (1793). 



Glycimeris arctica, Lamarck (1819) ; and Gould (1841). 



Panomya norvegica, Dall (1898). 



Grand Manan, " taken (dead) in forty fathoms on the Hake Ground " 

 (Stimpson) ; " dredged by me in Bedford Basin, Halifax, but all dead speci- 

 mens " (Willis) ; Bradelle Bank, — and Gaspe Bay, in 50 fathoms mud, six 

 dead but fresh specimens (Whiteaves) ; Little Metis (Sir J. W. Dawson). 

 Living specimens of this mollusc are very rarely brought up in the dredge, 

 owing to the long siphons of the animal and consequent depth of its burrow. 



In the Pleistocene of Canada it is said to be " very rare, a few valves only 

 having been found at Riviere du Loup." 



