40 THE CANADIAN NATURALIST. [Vol. 



VI. 



TERRACES LOWER ST. LAWRENCE. 



Heights in English feet^ roughly taken with Lockers Level and Aneroid. 



With reference to the differences in the above heights, it is to 

 be observed that the Terraces themselves slope somewhat, and are 

 uneven, and that the principal Terraces are sometimes complicated 

 by minor ones dividing them into little steps. It is thus somewhat 

 difficult to obtain accurate measurements. There seems, however, 

 to be a general agreement of these Terraces, and this I have no 

 doubt will be found to prevail very extensively throughout the 

 Lower St. Lawrence. It will be seen that three of the principal 

 Terraces at Montreal correspond with three of those at Murray 

 Bay ; and the following facts as to other parts of Canada, gleaned 

 from the Reports of the Survey and from my own observations, 

 will serve farther to illustrate this : 



Kemptville, sand and littoral shells, 250 feet. 

 Winchester, do. 300 



Kenyon, do. 270 



Lochiel, do. 264 & 290 



Hobbes' Falls, Fitzroy, do. 350 



Dulham Mills, De L'Isle, do. 289 



Upton, 257 



The evidence of sea action on many of these beaches, and the 

 accumulation of shells on others, point to a somewhat long resi- 

 dence of the sea at several of the levels, and to the intermittent 

 elevation of the land. On the wider Terraces, at several levels it 

 is usual to see a deposit of sand and gravel corresponding to the 

 Saxicava sand. 



