Procolpochelys Grandaeva (Leidy)

[An Early Carettine Sea Turtle]

Recherches Zoologiques Des Steppes Des Kirguiz

Darwinism To-day

[A Discussion of Present-day Scientific Criticism of the Darwinian Selection Theories, Together With a Brief Account of the Principal Other Proposed Auxiliary and Alternative Theories of Species-forming]

Darwinism To-day

[A Discussion of Present-day Scientific Criticism of the Darwinian Selection Theories : Together With a Brief Account of the Principal Other Proposed Auxillary and Alternative Theories of Species-forming]

Darwinism To-day

[A Discussion of Present-day Scientific Criticism of the Darwinian Selection Theories, Together With a Brief Account of the Principal Other Proposed Auxiliary and Alternative Theories of Species-forming]

Darwinism To-day

[A Discussion of Present-day Scientific Criticism of the Darwinian Selection Theories, Together With a Brief Account of the Principal Other Proposed Auxiliary and Alternative Theories of Species-forming]

Darwinism

[An Exposition of the Theory of Natural Selection, With Some of Its Applications]

Darwinism

[An Exposition of the Theory of Natural Selection, With Some of Its Applications]

Darwinism

[An Exposition of the Theory of Natural Selection, With Some of Its Applications]

(2nd Ed.)