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In the same wing-feather of the Argus pheasant dark spots may be seen surrounded by a pale zone, and white spots by a dark zone. Thus the formation of an ocellus in its most elementary state appears to be a simple affair. By what further steps the more complex ocelli, which are surrounded by many successive zones of colour, have been generated, I will not pretend to say.
The subsequent distribution of living beings in zones is the result of a gradual lowering of the general temperature, which first began to be felt at the poles.
It is a channel without water, formed, probably, by secular cooling and contraction of the earth's surface, like the fissures which became true streams in the tropics, and in the higher temperate zones. Its geological age would be the same as the depressions occupied by the ocean and the "massive" eruptions forming the mountain-skeleton of the globe.
And this is no doubt as true of animal as of vegetable life. The earth's surface has been divided into eight separate zones, each of which is distinguished by its peculiar or characteristic fauna and flora. Their order, measured from the geographical equator, is as follows; These several zones become sixteen in number when considered with reference to both the northern and southern hemispheres.
When I was a boy I used to go on long canoeing trips, following our river to its mouth. I don't like the tropics as well as I do the temperate zones." "If you weren't such a tremendous grind you would do it now," Julius offered. "A fellow needs a vacation, now and then, if he's to keep in shape." Waldron glanced at him, smiling. "So he does. But somehow I've managed to keep in shape.
For though other species of whales find their food above water, and may be seen by man in the act of feeding, the spermaceti whale obtains his whole food in unknown zones below the surface; and only by inference is it that any one can tell of what, precisely, that food consists.
We must, also, bear in mind the occurrence in both hemispheres of former Glacial periods; for these will account, in accordance with the same principles, for the many quite distinct species inhabiting the same widely separated areas, and belonging to genera not now found in the intermediate torrid zones.
The zones were imaginary bands or circles in the heavens producing an effect of climate on corresponding belts on the globe of the earth. The polar circles and the tropics mark these divisions.
This ancient palace was ornamented by successive generations; and they dug a canal which passed through the zones of land from the island to the sea.
The most eastern line occupied by the Tartar columns was not situated beyond the eighty-fifth meridian, which passes through Tomsk. This meridian once passed, Michael considered that he should be beyond the hostile zones, that he could traverse Genisci without danger, and gain Krasnoiarsk before Feofar-Khan had invaded the province.
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