14 Darbishire, Mendelian Principles of Heredity. 



The reader may suspect that there is something 

 pecuHar about these two characters — albinism and waltz- 

 ing — that the former is one that is likely to have arisen 

 as a sport, and that the latter is, in a way, pathological, 

 and that both are of such a kind as to be very quickly 

 eliminated in the struggle for existence: my opinion is 

 that such a suspicion is of great interest. But I do not 

 propose to discuss the source of such variations here : 

 all I have tried to do is to sketch the relation which exists 

 between Mendelian Principles and current theories of the 

 origin of species. 



List of Authorities referred to in the Text: 



Together with most of the literature on the subject 

 which has appeared during and since igo2. 



'65. Mendel, Gregor. Versuche liber Pflanzen - Hybridan. 

 Verhandl. d. Naturforsch. Ver. Briinn, vol. 4, 1865 

 {Abhandlungen). 



'94. Bateson, W. Materials for the Study of Variation. 



Macmillan, London. 

 '96- Pickering, J. W. Coagulation in Albinos. Journ. Physiol.^ 



vol. 20, p. 310. 



'97. Galton, Francis. The average Contribution of each 

 several Ancestor to the total Heritage of the Offspring. 

 Proc. Roy. Soc, vol. 61, p. 401 — 413. 



'98. Weldon, W. F. R. Presidental Address to Section D. 

 British Assoc, Bristol. B. A. Report^ 1898. 



'99. EwART, J. CossAR, The Penycuik Experiments. A. and 

 C. Black, London. 



:00. Davenport, C. B. Review of von Guaita's experiments 

 in Breeding Mice. Biol. Bulletin, vol. 2, pp. 121 — 128. 



:oo. Pearson, Karl, The Grammar of Science. A. and C. 

 Black, London. 



