During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole races of animals—each group adapted to the physical conditions in which they lived—were successively created and exterminated.


Siluria (1854)


During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole...

During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole...

During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole...

During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole...