426 INTRODUCTION TO CYTOLOGY 



19056. Studies on chromosomes. 11. The paired microchromosomes, idiochromo- 



somes, and heterotypic chromosomes in Hemiptera. Ibid. 2: 507-546. 

 1905c. The chromosomes in relation to the determination of sex. Science 20: 



564. 

 1906. Studies on chromosomes. III. The sexual differences of the chromosome 



groups in Hemiptera, with some considerations on the determination and 



heredity of sex. Jour. Exp. Zool. 3 : 1-40. figs. 6. 

 1909a. Studies on chromosomes. IV. The "accessory" chromosome in Syro- 



mastes and Pyrrochoris with a comparative review of the types of sexual differ- 

 ence of the chromosome groups. Ibid. 6 . 69-100. pis. 2. figs 2. 

 19096. Studies on chromosomes. V. The chromosomes of Metapodius. A 



contribution to the hypothesis of the genetic continuity of chromosomes. Ibid. 



6 : 147-206. 1 pi. figs. 13. 



1909c. The cell in relation to heredity and evolution. In " Fifty Years of Darwin- 

 ism." New York. 

 1910. The chromosomes in relation to the determination of sex. Science Progress 



16 : 570-592. figs. 3. 



1911a. The sex chromosomes. Arch. Mikr. Anat. 77: 11 249-271. 5 figs. 

 19116. Studies on chromosomes. VII. A review of the chromosomes of Nezara, 



etc. Jour. Morph. 22: 71-110. 1 pi. 

 1912a. Some aspects of cytology in relation to the study of genetics. Am. Nat. 



46:57-67. 



19126. Studies on chromosomes. VIII. Observations on the maturation-phenom- 

 ena in certain Hemiptera and other forms, with considerations on synapsis and 



reduction. Jour. Exp. Zool. 13 : 345-449. pis. 9. 

 WILSON, E. B. and MORGAN, T. H. 1920. Chiasmatype and crossing-over. Am. 



Nat. 64: 193-219. figs. 8. 

 VON WINIWARTER, H. 1912. Etudes sur la spermatogenese humaine. Arch, de 



Biol. 27 : 91-189. pis. 6, 7. 

 WODSEDALEK, J. E. 1920. Studies on the cells of cattle with special reference to 



spermatogenesis, oogonia, and sex-determination. Biol. Bull. 38: 290-316. 



pis. 5. 

 WUIST, E. D. 1913. Sex and development of the gametophyte of Onoclea struthiop- 



teris. Physiol. Res., Prelim. Abstr. 1 : 93-94. 

 YAMPOLSKY, C. 1919. Inheritance of sex in Mercurialis annua. Am. Jour. Bot. 



6:410-442. pis. 37-40. 

 1920a. The occurrence and inheritance of sex intergradation in plants. Ibid. 7 : 



21-38. 

 19206. Sex intergradation in the flowers of Mercurialis annua. Ibid. 7: 95-100. 



pi. 5. 

 ZACHARIAS, E. 1913. Die Chromatin-Diminution in den Furchungszellen von 



Ascaris megalocephala. Anat. Anz. 43 : 33-53. figs. 2. 

 ZADE, A. 1914. Serologische Studien an Leguminosen und Gramineen. Zeitschr. 



f . Pflanzenziich. 2 : 101-151. 

 1918. Der Hafer. Eine Monographic auf wissenschaftlicher und praktischer 



Grundlage. pp. 355. figs. 32. Jena. 

 ZOJA, R. 1895. Sullo sviluppo dei blastomeri isolati uova di alcune meduse (e di 



altri organism!). Arch. Entw. 1: 578-595. pis. 21-23; 2: 1-37, pis. 1-4. 



