. The origin and evolution of life, on the theory of action, reaction and interaction of energy. The Existing LeatherbackChelonian Sphargis. In this form the solid armature adapted to aformer terrestrial existence is being replacedby a leathery shield in which are embeddedsmall polygonal ossicles. After Lydekker. phase the animals returnedto shore and entered asecondary littoral, shore-liv-ing phase, also of long dur-ation, in course of which they developed a second bonyarmature quite distinct in plan and pattern from the first. AQUATIC REPTILES 203 Descendants of these secondarily armored, sh

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. The origin and evolution of life, on the theory of action, reaction and interaction of energy. The Existing LeatherbackChelonian Sphargis. In this form the solid armature adapted to aformer terrestrial existence is being replacedby a leathery shield in which are embeddedsmall polygonal ossicles. After Lydekker. phase the animals returnedto shore and entered asecondary littoral, shore-liv-ing phase, also of long dur-ation, in course of which they developed a second bonyarmature quite distinct in plan and pattern from the first. AQUATIC REPTILES 203 Descendants of these secondarily armored, sh

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Image ID: 2CEN87T

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