140 
ST. FE 
CHAP. 
When America, and especially North America, possessed 
its elephants, mastodons, horse, and hollow-horned ruminants, 
it was much more closely related in its zoological characters to 
the temperate parts of Europe and Asia than it now is. As 
the remains of these genera are found on both sides of Behring’s 
Straits 1 and on the plains of Siberia, we are led to look to the 
north-western side of North America as the former point of 
communication between the Old and so-called New World. 
And as so many species, both living and extinct, of these same 
1 See the admirable Appendix by Dr. Buckland to Beechey’s Voyage ; also the 
writings of Chamisso in Kotzebue’s Voyage. 
