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 / by Vernon L. Kellogg.

  • Kellogg, Vernon L. (Vernon Lyman), 1867-1937.
Date:
1907
Catalogue details

Licence: In copyright

Credit: 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 / by Vernon L. Kellogg. Source: Wellcome Collection.

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    PAGE lizards, 123. Substitutionary theories of the origin of secondary sexual characters, 124. Appendix: References to books and papers discussing sexual selection, 125. Wolff’s critical exposition of weak- nesses in sexual selection, 126. CHAPTER VI. DARWINISM DEFENDED 129 Position of the defenders of Darwinism, 129. Reaction against the too speculative positions of Haeckel and Weismann, 130. “Haeckelismus,” 130. Weismannism, 131. Struggle between Neo-Darwinians and Neo-La- marckians, 133. Concessions of the Neo-Darwinians, 134. Answer to objection concerning the too slight character of fluctuating or Darwinian variations to serve as handles for natural selection, 138. Answer to the objection concern- ing the linear and quantitative character of Darwinian variation, 139. Answer to the objection that selection can- not produce many-branched descent, 142. Answer to the statement that selection can produce continuous change or evolution, but not species, 143. Answer to the objec- tion concerning the production by selection of co-adaptive and highly complex specialisations, 144. Answer to the -objection concerning the over-development of specialisa- tions, 146. Discussion of the difficulty that natural selec- tion has with structural degeneration, 146. The Darwinian answer to the expressions of doubt about the rigour of selection, 148. Answer to the objections to the sexual selection theory, 148. Discussion of the objection to the derivation of evidence for natural selection from the facts of artificial selection, 150. Tayler’s general defence, 153. Appendix: Weldon’s experiments on Carcinus, 158. Tayler’s explanation of degeneration by natural selection, 162. Plate’s explanation of character fixity in domestic animals, 163. CHAPTER VII. DARWINISM DEFENDED (Continued): PLATE’S CON- CILIATORY DEFENCE 164 Plate, a fair-minded Darwinian champion, 164. Answers to the objection based on the slight character and inutility of Darwinian variations, 165. Many slight differences at