Darwinism Illustrated: Wood-engravings Explanatory of the Theory of Evolution

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Open Court Publishing Company, 1892 - Evolution - 94 pages
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Page 42 - A series of embryos at three comparable and progressive stages of development (marked I, II and III), representing each of the classes of vertebrated embryos below the Mammalia.
Page 82 - ... entirely depend on tactile impressions : when touched ever so lightly a healthy larva immediately assumes the terrifying attitude, and turns so as to present its full face towards the enemy ; if touched on the other side or on the back it instantly turns its face in the appropriate direction. FIG. 60.— The larva of Puss Moth in its terrifying attitude after being disturbed ; full-fed ; natural size. Effect heightened by two pink whips The effect is also greatly strengthened by two pink whips...
Page 36 - Häckel). na. nose; au, eye; g, ear; md, mouth; es, gill openings; x, notochord; mr, spinal tube; kg. gill-vessels; k, gill-intestine; hz, heart; ms, muscles; ma...

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