Book 5
19
Anaximander’s opinion is, that the first animals were generated in moisture, and were enclosed in bark on which thorns grew; but in process of time they came upon dry land, and this thorny bark with which they were covered being broken, they lived for a short space of time. Empedocles says, that the first generation of animals and plants was by no means completed, for the parts were disjoined and would not admit of a union; the second preparation for their being generated was when their parts were united and appeared in the form of images; the third preparation for generation was when their parts mutually amongst themselves gave a being to one another; the fourth, when there was no longer a mixture of similar elements (like earth and water), but a union of animals among themselves,—in some the nourishment being made dense, in others female beauty provoking a lust of spermatic motion. All sorts of animals are discriminated by their proper temperament and constitution; some are carried by a proper appetite and inclination to water; some, which partake of a more fiery quality, to breathe in the air; those that are heavier incline to the earth; but those animals whose parts are of a just and equal temperament are fitted equally for all places.
Chapter XX. HOW MANY SPECIES OF ANIMALS THERE ARE, AND WHETHER ALL ANIMALS HAVE THE ENDOWMENTS OF SENSE AND REASON.
