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
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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 of acquired characters, 266. Great use could be made of the Lamarckian factors in explaining evolution phenomena if these factors could be given validity, 271. Orthogenesis and determinate variation, pointing toward orthogenesis, 271. Nageli’s theory of orthogenesis, 277. Eimer’s ortho- genetic theory, 282. Cope’s theory of bathmism and kinetogenesis, 285. Jaeckel’s theory of metakinesis, 289. Appendix: References to Lamarck’s writings, 290. Brown- Sequard’s experiments on guinea pigs, 290. Hyatt’s studies of Planorbts, 295. Fischer’s experiments with butterflies, 296. Experiments with silkworms, 298. Ref- erences to books and papers on inheritance of acquired characters, 305. Redfield’s position, 305. Montgomery’s explanation of inheritance of variation, 306. Scientific aspects of Burbank’s work, 310. Orthogenetic variation in palaeontology, 319. A case of apparent determinate variation, 319. Pfeifer’s theory of orthogenesis, 320. Eimer’s theory of orthogenesis, 321. Apparent determi- nate evolution, 322. Snodgrass’s observances on bills of Galapagos birds, 323. Cope’s belief in orthogenetic evolu- tion, 323. Whitman’s belief in determinate variation, 325. Cunningham and orthogenesis, 326. CHAPTER XI. OTHER THEORIES OF SPECIES-FORMING (Con- tinued): THEORIES ALTERNATIVE TO SELEC- TION (Continued) 327 Heterogenesis or the mutations theory, 327. Formula- tions of heterogenesis theories by von Kolliker, Dali, Galton, and Emery, 330. Korschinsky’s heterogenesis theory, 333. De Vries’s mutations theory, 337. Present status of de Vries’s theory, 348. Alternative theories to explain secondary sexual characters, 352. Appendix: Mendel and his work, 356. References to recent work on Mendelism, 357. Darwin’s examples of race origin from sports, 357. A recent example of race origin from a sport in cattle, 358. Galton’s discussion of specific stability, 360. References to discussions by de Vries of species-forming, 362. American opinions of the mutations theory, 362. Davenport’s example of species origin by slight continuous change, 367. Merriam’s criti- cism of the mutations theory, 367. Plate’s criticism of the