46 
A VOYAGE TO SPITZBEBGEN. 
Allegh allies, White Mountains, &c.; and the result 
would be, that, on the one hand, many Scandinavian 
plants which had been driven out of Greenland, but 
were preserved in the United States, would reappear 
on the Polar Islands and Labrador, accompanied with 
sundry American mountain types; and, on the other, 
that a few Greenland Scandinavian types which had 
been lost in the struggle with the American types 
during their northward migration, and which hence 
do not reappe/ir in Labrador and the Polar Islands, 
might well be preserved in the Alleghanies and White 
Mountains. And, lastly, that a number of Scandi¬ 
navian plants which had changed their form or habit 
during the migration in America in conflict with the 
American types, would appear in the Polar Islands as 
American varieties or representative species of Scan¬ 
dinavian plants. Whether or not his be a true hypo¬ 
thesis, it embraces all the facts; and botanists look 
anxiously to further explorations in the northern parts 
of Greenland for more light on the subject, and espe¬ 
cially for evidence of rising or sinking of the land, 
and for evidence of ancient connection between Green¬ 
land and Scandinavia \ for observations on the tem¬ 
perature, direction, and depth of transporting currents 
in these seas, and on the habits of the ruminant 
migrating animals that may have influenced the dis- 
