STUDIES ON CHROMOSOMES 431 



SUTTON, W. S. 1900 The spermatogonial divisions in Brachystola magna. 



Kansas Univ. Quart., vol. 9. 



1902 On the morphology of the chromosome-group in Brachystola 



magna. Biol. Bull., vol. 4, no. 1. 



SYKES, M. G. 1909 On the nuclei of some unisexual plants. Ann. Bot., vol. 23. 

 VEJDOVSKY, F 1907 Xeue Untersuchungen uber die Reifung und Befruchtung. 



Konigl. Bohmische Ges. d. VViss., Prag. 



DE VRIES, H. 1903 Befruchtung und Bastardierung, Leipzig. 

 WINIWARTER ET SAiNTMONT 1909 Nouvelles recherches sur I'ovog6nese et 



1'organogenese de 1'ovaires des mammiferes (chat). IV. Ovognese 



de la zone cortical primitive. Arch. Biol. torn. 25. 

 WILSON, E. B. 1905 a The chromosomes in relation to the determination of sex 



in insects. Science, vol. 22. p. 564. 



1905 b Studies on chromosomes. I. The behavior of the idiochromo- 

 somes in Hemiptera. Jour. Exp. Zool., vol. 2, no. 3. 



19C5 c Studies, II. The paired microchromosomes, idiochromosomes 

 and heterotropic chromosomes in Hemiptera. Ibid., vol. 2, no. 4. 



1906 Studies, III. The sexual differences of the chromosome-groups 

 in Hemiptera, with some considerations on the determination and hered- 

 ity of sex. Ibid., vol. 3, no. 1. 



1909 a Studies, IV. The 'accessory' chromosome in Syromastes and 

 Pyrrhocoris, with a comparative review of the types of sexual differences 

 of the chromosome-groups. Ibid., vol. 6, no. 1. 



1909 b The female chromosome-groups in Syromastes and Pyrrhocoris. 

 Biol. Bull., vol. 16, no. 4. 



1909 c Photographic illustrations of the morphological and physio- 

 logical individuality of the chromosomes in Hemiptera (Abstract). 

 Proc. Seventh Internat. Zool. Congr., Boston, August, 1907. 

 1911 a Studies, VII. A review of the chromosomes of Nezara, with 

 some more general considerations. Jour. Morph., vol. 22, no. 1. 



1911 b The sex chromosomes. Arch. Mik. Anat., Bd. 77. 



1912 Some aspects of cytology in relation to the studv of genetics. 

 Am. Naturalist, vol. 46, February. 



