201 
Baron, R., Nouvelles considerations theoriques et experimentales sur la loi Del- 
boeuf, in: Bull. sc. France Belgique. V. 25. 1S93. p. 155 — 173. 
La loi de Delboeuf, ibid. V. 22. 1890. p. 122—137. 
Bateson, W., Materials for the study of Variation. London, Macmillan, 1894. 
Beddaed, F. E., Animal coloration. London 1892. 
Braun, Fr., Zur geschlechtlichen Zuchtwahl der Sperlingsvögel, in: J. Ornithol. 
Y. 47. 1899. p. 293—306. 
Brooks, W. K., Lamarck and Lyell: a short way with Lamarckians, in: Nat. 
Sc. V. 8. 1896. p. 89—93. 
Lyell and Lamarckism, a Rejoinder, ibid. Y. 9. 1896. p. 115 — 119. 
* The law of heredity : A study of the cause of variation and the origin of 
living organisms. Baltimore 1883. 
Bumpus, Referat über eine Arbeit in: Revue scientif. 22 Avril. 1899. p. 502 unter 
dem Titel: L'elimination des moins aptes. 
Catchpool, E., An unnoticed factor in evolution, in: Nature. Y. 31. p. 4. Nov. 
1884. 
Claparede, E., La selection naturelle et l'origine de Thomme, in: Rev. Cours 
sc. Y. 7. 1870. p. 564 — 571. Besprechung von Wallace, Contributions the 
theory of nat. selection. 
Claus, C, Über die Werthschätzung der natürlichen Zuchtwahl als Erklärungs- 
princip. Yortrag. Wien 1888. 
Cockerell, T. D. A., Physiological specific characters, in: Nature. V. 56. 1897. 
p. 11, 12. 
The utility of specific characters, ibid. p. 31. 
Definite variations, ibid. Y. 55. 1896. p. 439. 
*Coe, Ch. Cl., Nature versus natural selection. London 1895. p. 591. Ref. in: 
Nature. Y. 53. 1896. p. 386. 
Conklin, E. Gr., Discussion of the factors of organic evolution from the embryo- 
logical standpoint, in: Proc. Am er. phil. Soc. Philadelphia. Y. 35. 1896. 
p. 78—88. 
Cope, E. D., The origin of the fittest, Essays on Evolution. London 1887. 
The energy of evolution, in: Amer. Natural. Y. 28. 1894. p. 205—219. 
The primary factors of organic evolution. Chicago 1896. 
*Cramer, Fr., The logic of Darwin, a study in scientific method. Chicago, A. 
C. McClurg and Co., 1896. Ref. in: Nature. Y. 56. 1897. p. 609—611. 
Cunningham, J. T., The evolution of flatfishes, in: Nat. Sc. Y. 1. 1892. p 191 
— 199. 
Neuter insects and Darwinism, ibid. Y. 4. 1894. p. 281 — 289. 
The origin of species among flatfishes, ibid. Y. 6. 1895. p. 169 — 177, 233 
—239. 
Lyell and Lamarckism, a reply to Prof. Brooks, ibid. Y. 8. 1896. p. 326 
—331. 
The utility of specific characters, in: Nature. Y. 54. 1896. p. 522, 523. 
The species, the sex and the individual, in: Nat. Sc. Y. 13. 1898. p. 184 
—192, 233—239. 
Prof. Weldon's evidence of the operation of nat. selection, ibid. V. 14. 
1899. p. 38 — 45. Im Wesentlichen derselbe Inhalt auch in: Nature Y. 58. 
1898. p. 593, 594. 
.Dahl, Fr., Die Bedeutung der geschl. Zuchtwahl bei der Trennung der Arten, 
in: Zool. Anz. Y. 12. 1889. p. 262—266. 
