The Twelve Groups of Animals

Eugen Kolisko, M.D. “The primary division of the animal kingdom is into phyla. Each phylum is sharply characterised by the possession of a plan of structure in the adult which…
Read moreEugen Kolisko, M.D. “The primary division of the animal kingdom is into phyla. Each phylum is sharply characterised by the possession of a plan of structure in the adult which…
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