Read it through once

“It is a survival—a survival of the fittest. Mr. Darwin invented the theory that goes by that name, but the Ornithorhynchus was the first to put it to actual experiment and prove that it could be done. Hence it should have as much of the credit as Mr. Darwin. It was never in the Ark; you will find no mention of it there; it nobly stayed out and worked the theory. Of all creatures in the world it was the only one properly equipped for the test. The Ark was thirteen months afloat, and all the globe submerged; no land visible above the flood, no vegetation, no food for a mammal to eat, nor water for a mammal to drink; for all mammal food was destroyed, and when the pure floods from heaven and the salt oceans of the earth mingled their waters and rose above the mountain tops, the result was a drink which no bird or beast of ordinary construction could use and live. But this combination was nuts for the Ornithorhynchus, if I may use a term like that without offense. Its river home had always been salted by the flood-tides of the sea. On the face of the Noachian deluge innumerable forest trees were floating. Upon these the Ornithorhynchus voyaged in peace; voyaged from clime to clime, from hemisphere to hemisphere, in contentment and comfort, in virile interest in the constant change of scene, in humble thankfulness for its privileges, in ever-increasing enthusiasm in the development of the great theory upon whose validity it had staked its life, its fortunes, and its sacred honor, if I may use such expressions without impropriety in connection with an episode of this nature.