Most of the solar vortices indicate clockwise rotation in the southern hemisphere and counter-clockwise rotation in the northern, as in the case of terrestrial cyclones.
In the southern hemisphere the Palaeozoic flora appears ultimately to have been profoundly modified by a lowering of temperature and the existence of glacial conditions over a wide area.
The parent stock it is now impossible to trace; but the wild dog, wherever found on the continent of Asia, or northern Europe, has nearly the same character, and bears no inconsiderable resemblance to the British dog of the ordinary type; while many of those from the southern hemisphere can scarcely be distinguished from the cross-bred poaching dog, the lurcher.
Certain species of the southern hemisphere genus Dacrydium afford particularly striking instances of heterophylly, e.g.
In the southern hemisphere there is a transition to the low-pressure belt encircling the Southern Ocean, in which westerly and north-westerly winds continue all the year round.
The existence of a layer of water of low salinity at a depth of 500 fathoms in the tropical oceans of the southern hemisphere is to be referred to this action of the melting ice of the Antarctic regions.
In the southern hemisphere there is comparatively little inhabited land in high latitudes and observational data are few; thus little is known as to how the frequency varies with latitude and longitude.
It is the Tringa interpres 2 of Linnaeus and Strepsilas interpres of most later writers, and is remarkable as being perhaps the most cosmopolitan of birds; for, though properly belonging to the northern hemisphere, there is scarcely a sea-coast in the world on which it may not occur: it has been obtained from Spitzbergen to the Strait of Magellan and from Point Barrow to the Cape of Good Hope and New Zealand - examples from the southern hemisphere being, however, almost invariably in a state of plumage that shows, if not immaturity, yet an ineptitude for reproduction.
The southern hemisphere ranks lightly in the matter of consumption, the only other country worth mentioning there besides the Australasian and Cape dependencies being Argentina.
The Falkland Islands correspond very nearly in latitude in the southern hemisphere with London in the northern, but the climatic influences are very different.