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tade ? Need we wonder that this space, now rich in 

 cultivation, should abound with the remains of nume- 

 rous and varied species of shell fish, while those im- 

 mense focusses, Hudson's Bay, Lakes Superiour, 

 Michigan, Huron, Erie, Ontario, and many others 

 were yielding up their treasures to the impetuosity of 

 a resistless current, to mingle in promiscuous ruin, and 

 be swept across the country and deposited in this, now 

 extinct sea ? Indeed, in this view, it appears by no 

 means problematical. 



But to return to Lake Ontario. Not only does the- 

 extent of country over which this supposed current 

 must have run; and the proportionate alluvial deposite 

 on the shores of Ontario, favour the opinion that these 

 deposites were actually occasioned by this cause only ; 

 but there are others of equal, if not more importance 

 in support of this hypothesis. 



Mr. Clinton observes, when describing the ridge in 

 the vicinity of the south shore of Lake Ontario, that 

 " The gravel with which it is covered was deposited 

 there by the waters, and the stones every where indi- 

 cate, by their shape, the abrasion and agitation pro- 

 duced by that element. All along the borders of the 

 western rivers and lakes, there are small mounds, or 

 heaps of gravel of a conical form erected by the fish 

 (it is said) for the protection of their spawn ; these 

 fish banks are found at the foot of the ridge on the side 

 towards the lake : on the opposite aide none have been 

 discovered.-' 



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