Tertiary Fossils of Canada, ^c, 193 



consequence less strongly marked than at Montreal, but is indi- 

 cated by beds containing Mytilus edulis alone, overlying those 

 which contain shells characteristic of the open sea. At Cape 

 Elizabeth the pleistocene clays occupy depressions between ridges 

 of slate. At the only place where I observed fossils, the deposit 

 is a hard gray stony clay containing a mixture of deep sea and 

 littoral shells. The bivalves are mostly in detached valves and 

 often on edge, as if the bed had been subjected to the pressure of 

 ice after its deposition. 



The fossils observed in the above mentioned beds are as fol- 

 lows, — those common to Portland and the St. Lawrence valley 

 being marked with asterisks : 



Balanus crenatus,^ 



Fusus decemcostatus, (var. horealis,) 



Buccinum undatum^^ 



Fusus scalar i/or mis J 



Natica clausa,^ 



Mytilus edulisj^ 



Mactra ovalisj 



JSaxicava rugosa^ 



Astarte elliptica, 



A, corwpressa^ 



As arctica, 



Tellina proxima^'^ 



Fecten Islandicus,^ 



Mya truncata^ 



Nucula Jacksoni, 



Aphrodite Groenlandicay 



Lepralia variolosa^ 



L. Belliij^ 



Memhranipora, (undetermined.) 



The assemblag^e of shells in the above list cannot be said to 

 indicate any very great change of climate, though more like that 

 of the Gulf of St. Lawrence than of Portland at present. With 

 the exception of Astarte arctica not now found on the Ameri- 

 can coast, and Nucula Jacksoni which is possibly extinct, they are 



* A new species, now living in the Gulf of St. Lawrence, and de- 

 cribed in the Report of the Geological Survey of Canada for 1858. 



Can. Nat. 3 Vol. V. 



