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This view Häckel expounds in the thirteenth and partly also in the first chapter of his "Natural History of Creation," and explains the origin of the first and most simple organic individuals either through what he calls autogony in an inorganic fluid, or through plasmogony in an organic fluid a plasma or protoplasma.
He is a thorough evolutionist, starting from essentially the same point with Darwin; for he conceives of all the forms or species of animals and plants "comme tire tout entier d'un protoplasma primordial, uniform, instable, eminemment plastique."
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