IN THE TROPICS : ITI. 183 



De Vries, in his " Species and Varieties : their Origin by Mu- 

 tation," has republished the account of some of his experi- 

 ments, and has added a certain number of new ones. 



On the cytological side much work has also been done. A 

 discussion of such work, together with a full list of literature, 

 is to be found in the paper by Allen in the Annals of Botany 

 for April 1905. 



APPENDIX IV.— LIST OF LITERATURE. 



1. Allen, C. E. Nuclear Division in the Pollen 



Mother ("ells of Lilium canadense. Annals of 

 Botany, Vol. XIX., p. 189 . . . . 1905 



2. Bateson, W. Presidential Address to the Zoo- 



logical Section of the British Association . . 1 904 



3. , Miss E. R. Saunders, R. C. Punnett. and 



C. C. Hurst. Reports to the Evolution Com- 

 mittee of the Royal Society, II. . . 1905 



4. Biffen, R. H. Mendel's Laws of Inheritance and 



Wheat Breeding. Journal of Agricultural 

 Science, I., 1 . . . . 1905 



5. . The Inheritance of Sterility in the Barleys, 



Ibid I., 2 .. .. .. 1905 



6 Castle, W. E. Heredity of Coat Colours in Guinea- 

 pigs and Rabbits. Carnegie Institution of 

 Washington . . . . 1905 



7. Correns, C. Ein typisch spaltender Bastard 

 zwischen einer einjahrigen und ein zweijah- 

 rigen Sippe des Hyoscyamus niger. Berichte 

 d. d. bot. Ges. XXII., 8 . . . . 1904 



8. . Zur Kenntnisse der scheinbar neuen Merk- 



male der Bastarde. Ibid. XXIII., 2 .. 1905 



9. . Einige Bastardierungsversuche mit ano- 



malen Sippen und ihre allgemeinen Ergebnisse. 

 Pringsheims Jahrbucher, 48, 458 . . 1905 



9(8)06 (12) 



