Tyler, John Mason, 1851-1929
"A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895"
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\ | /Fish.
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\ | / /Mollusca.
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Annelid.------\ | / /
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Schematic Worm.\ | /
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\ | / /Turbellaria.
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Hydra.\ | /
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| /Volvox.
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Magosphaera.\ | /
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\| /Amoeba.
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