We cannot doubt after what we know of the power of heat that the nebulous form of matter was attended by the condition of a very high temperature. - Robert Chambers

Zoophyta, polyparia, crinoidea, conchifera, and crustacea are the orders of the animal kingdom thus found in the earliest of earth's sepulchres.

Mr. Babbage's illustration powerfully suggests that this ordinary procedure may be subordinate to a higher law which only permits it for a time, and in proper season interrupts and changes it.

The whole train of animated beings, from the simplest and oldest up to the highest and most recent, are, then, to be regarded as a series of advances of the principle of development, which have depended upon external physical circumstances, to which the resulting animals are appropriate.