Chapter Vi.--Progress of the Geological Dynamics of Organized

BEINGS.

Sect. 1. Objects of this Science. 561 Sect. 2. Geography of Plants and Animals. 562 Sect. 3. Questions of the Transmutation of Species. 563 Sect. 4. Hypothesis of Progressive Tendencies. 565 Sect. 5. Question of Creation as related to Science. 568 Sect. 6. The Hypothesis of the Regular Creation and Extinction of Species. 573 1. Creation of Species. 573 2. Extinction of Species. 576 Sect. 7. The Imbedding of Organic Remains. 577

PHYSICAL GEOLOGY.