ste aug ? ati 
in its relations to that of North America. 193 
These are among the considerations which suggest an ancient 
continuity of territory between America and Asia, under a Iati- 
tude, or at any rate with a climate, more meridional than would 
be effected by a junction through the chains of the Aleutian and 
the Kurile Islands.” es 
and perhaps Scolopendrium. Hottonia might have been added, 
but for a species accredited to Java. 
Western America. Let it also be noted, that there are even 
fewer Western-European types in the Pacific than in the 
Atlantic United States, notwithstanding the similarity of the 
climate ! wi 
That representation by allied species of genera peculiar, or 
nearly peculiar, to two regions, furnishes evidence of similar 
nature and of equal pertinency with representation by identical 
Species, will hardly be doubted. Whether or not susceptible of 
Scientific explanation, it is certain that related species of phenog- 
amous plants are commonly associated in the same region, or 
are found in comparatively approximate (however large) areas 
of similar climate.* Remarkable exceptions may indeed be ad- 
‘ap : neric 
rdial, and therefore beyond all scientific _ex- 
imordial, sulin eet amaceeal xoeult: 
