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Updated: May 15, 2025
The extinct Protamniote, the ancestor of the whole group, belongs in its whole organisation to the reptile class. The genealogical tree of the amniote group is clearly indicated in its chief lines by their paleontology, comparative anatomy, and ontogeny. The group succeeding the Protamniote divided into two branches. The branch that will claim our whole interest is the class of the Mammals.
The primitive or primordial kidneys of the amniote embryo were formerly called the "Wolffian bodies," and sometimes "Oken's bodies." They act for a time as kidneys, absorbing unusable juices from the embryonic body and conducting them to the cloaca afterwards to the allantois.
Man is, in every feature of his organisation and embryonic development, a true Amniote, and has descended from the Protamniote with all the other Amniotes. The birds and mammals made their first appearance during this period. Even the reptiles show their greatest growth at this time, so that it is called "the reptile age."
Judge for yourself; the latter derives the genesis of man from a group of plastides, from the jelly-like moneron; this moneron, through the ameoba, the ascidian, the brainless and heartless amphioxus, and so on, transmigrates in the eighth remove into the lamprey, is transformed, at last, into a vertebrate amniote, into a premammalian, into a marsupial animal.... The vampire, in its turn, belongs to the species of vertebrates.
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