If we turn to nature to test the truth of these remarks, and look at any small isolated area, such as an oceanic island, although the total number of the species inhabiting it, will be found to be small, as we shall see in our chapter on geographical distribution; yet of these species a very large proportion are endemic,--that is, have been produced there, and nowhere else.
Although I do not doubt that isolation is of considerable importance in the production of new species, on the whole I am inclined to believe that largeness of area is of more importance, more especially in the production of species, which will prove capable of enduring for a long period, and of spreading widely.
We can, perhaps, on these views, understand some facts which will be again alluded to in our chapter on geographical distribution; for instance, that the productions of the smaller continent of Australia have formerly yielded, and apparently are now yielding, before those of the larger Europaeo-Asiatic area. Thus, also, it is that continental productions have everywhere become so largely naturalised on islands.
I conclude, looking to the future, that for terrestrial productions a large continental area, which will probably undergo many oscillations of level, and which consequently will exist for long periods in a broken condition, will be the most favourable for the production of many new forms of life, likely to endure long and to spread widely.
But as from the high geometrical powers of increase of all organic beings, each area is already fully stocked with inhabitants, it follows that as each selected and favoured form increases in number, so will the less favoured forms decrease and become rare.
Curbing his impatience, he again looked out upon the area, and awaited the result in silence.
Then they drew warily back, keeping their eyes riveted on the ruin, as if they expected to see the apparitions of the dead issue from its silent walls, until, having reached the boundary of the area, they moved slowly into the thicket and disappeared.
Her mighty land areas
breathed unfettered free-dom.
"I want you to take notice," he added to the others, as he gently touched the live-end of his fresh cigar to the area
of dark skin above and between the steward's eyes.
Keeling Island -- Singular appearance -- Scanty Flora -- Transport of Seeds -- Birds and Insects -- Ebbing and flowing Springs -- Fields of dead Coral -- Stones transported in the roots of Trees -- Great Crab -- Stinging Corals -- Coral eating Fish -- Coral Formations -- Lagoon Islands, or Atolls -- Depth at which reef-building Corals can live -- Vast Areas
interspersed with low Coral Islands -- Subsidence of their foundations -- Barrier Reefs -- Fringing Reefs -- Conversion of Fringing Reefs into Barrier Reefs, and into Atolls -- Evidence of changes in Level -- Breaches in Barrier Reefs -- Maldiva Atolls, their peculiar structure -- Dead and submerged Reefs -- Areas
of subsidence and elevation -- Distribution of Volcanoes -- Subsidence slow, and vast in amount
Khaar and Nawagai of District Bajaur, local areas
Lower Mohmand, Upper Mohmand and Baizai of District Mohmand, local areas
Jamrud, Landi Kotal and Bara of District Khyber, local areas
Lower Orakzai, Upper Orakzai of District Orakzai, local areas
Lower Kurram, Central Kurram and Upper Kurram of District Kurram, local areas
Mir Ali, Miranshah and Razmak of District North Waziristan, local areas
Ladha, Sarwakai and Wana of district South Waziristan, local area
Hassan Khel of district Peshawar, Darra Adam Khel of District Kohat, local area
Wazir of District Bannu, local area
Bettani of District Lakki Marwat, local area
Darazanda of district Dera Ismail Khan and local area
Jandola of district Tank have been declared as police stations.
2 and 3's forestland stretches 206.849ha, but individuals and local authorities have recently begun clearing and logging the land to illegally expand their farmland.