PRESIDENTIAL ADDRESS. 1] 
on these platforms of erosion during the milder interglacial 
epochs of the same period. 
With the first hypothesis four great names are insepar- 
ably connected, namely Darwin, Dana, David, Davis. The 
names are in chronological order of the period of champion- 
ship of the hypothesis conducted by them. 
With thesecond hypothesis the principal names associated 
appear to be Semper, Murray, Alexander Agassiz, and 
Stanley Gardiner. 
To the second portion of the third hypothesis important 
contributions have been made by Vaughan, Guppy, Hill,. 
and Mayor. 
With the second division of this same idea, namely, that 
known as the Glacial Control Hypothesis, the name of Daly 
is inseparably associated. 
As late as 1921 G. A. Molengraaf’* pointed out that:— 
“The deep-sea basins and the adjoining elevated islands are 
simultaneously formed, and continue to be developed by a process 
of folding at a certain depth. 
The islands are elevated and grouped in rows because they are 
nothing but the culminating and fractured portions of submarine 
ridges which rise up on top of the anticlinal portions of the deep- 
seated folds. 
The trend of each row of islands roughly indicates the line of 
strike of the anticlinal axis of each of these folds. 
The deep-sea basins are elongated more or less exactly parallel 
_ to the adjoining rows of islands, because they are formed above 
the. subsiding synclinal portions of the deep-seated folds. 
All the islands are, as a rule, upheaved, but the upheaval has 
been very unequal, as can be observed if the islands are compared 
one with another, or if a comparative examination be made of 

> Modern Deep Sea Research in the East Indian Archipelago. Geo- 
graphical Journal, Vol. 57, 1921, p. 116. 
