2 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. VI. 
ios) 
in beach deposits of Iroquois age, and the finding of fossils in some 
of them has made it worth while to give this part of the Iroquois 
shore more careful study than it has hitherto received. The results are 
shown in the accompanying map of the beach in the County of York. 
It will be seen that north and northwest of Toronto it keeps a distance 
of about two anda half miles from the present shore, but toward the 
east approaches the lake until, as mentioned above, it is cut off for half 
a mile at the highest part of Scarboro’ Heights, and then withdraws to 
the northeast. 
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. Miles N.17° E. of Hamilton, Ontario. 
Two large bays project to the north, one in the valley of the Humber 
and its tributary Black Creek, three miles long and about the same in 
width ; the other in the Don valley, with a length of two miles from 
north to south, and a width of about four miles. A bar of coarse sand 
and gravel, often crossbedded, stretches from the east side of each bay 
towards the west, leaving a wide opening on that side, like the present 
arrangement of Toronto island and bay. A smaller’gravel spit is found 
extending northeast of Scarboro’ Heights, enclosing a small bay, now 
the valley of a tributary of Highland Creek. As mentioned before, the 
bay in the Humber valley and its gravel bar were briefly described and 
mapped by Sandford Fleming in 1861. Both the Humber and Don 
bars are mentioned by Spencer, but not particularly described. 
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