We soon entered the band of clouds, and did not again emerge from it that day.

About noon, finding pasture for the animals and bushes for firewood at Los Arenales, we stopped for the night.

This was near the uppermost limit of bushes, and the elevation, I suppose, was between seven and eight thousand feet.
I was much struck with the marked difference between the vegetation of these eastern valleys and those on the Chilian side: yet the climate, as well as the kind of soil, is nearly the same, and the difference of longitude very trifling.

The same remark holds good with the quadrupeds, and in a lesser degree with the birds and insects.

I may instance the mice, of which I obtained thirteen species on the shores of the Atlantic, and five on the Pacific, and not one of them is identical.