32 BOTANICAL GAZETTE (july 



16. Gregoire, V., La reduction numerique des chromosomes et les cineses de 

 maturation. La Cellule 21:297-314. 1904. 



17. Lutz, Anne M., Chromosomes of the somatic cells of the Oenotheras. 

 Science N. S. 27:335. 1908. 



18. Miyake, Kiichi. Ueber Reduktionsteilung in den Pollenmutterzellen 

 einiger Monokotylen. Jahrb. Wiss. Bot. 42:83-120. pis. 3-3. 1905. 



19. Mottier, D. M., The development of the heterotypic chromosomes in pollen 

 mother cells. Bot. Gazette 40:171-177. 1905. 



20. - — , The development of the heterotypic chromosomes in pollen mother 

 cells. Annals of Botany 21:309-347. pis. 27, 28. 1907. 



21. Nichols, M. Louise, The development of the pollen of Sarracenia. Bot. 

 Gazette 45:31-37. pi. 5. 1908. 



22. Overton, J. B., Ueber Reduktionsteilung in den Pollenmutterzellen einiger 

 Dikotylen. Jahrb. Wiss. Bot. 42:121-153. pis. 6, 7. 1905. 



23. Rosenberg, O., Das Verhalten der chromosomen in einer hybriden Pflanze. 

 Ber. Deutsch. Bot. Gesells. 21:110-119. 1903. 



24. - — , Ueber die Tetradentheilung eines Drosera-Bastardes. Ber. Deutsch. 

 Bot. Gesells. 22:47-53. P^ 4- I 9°4- 



25. — — , Zur Kenntniss der Reduktionstheilung in Pflanzen. Bot. Notiser 

 1905: pp. 24. Jigs. 14. 



26. , Cytological investigations in plant hybrids. Report 3d Internat. 



Conf. Genetics, pp. 289-291. 1906. 



27. - — , Cytological studies on the apogamy in Hieracium. Bot. Tidsskrift 

 28:143-170. Jigs. 13. pis. 1, 2. 1907. 



28. Schaffner, J. H., Chromosome reduction in the microsporocytes of 

 Lilium tigrinum. Bot. Gazette 41:183-191. pis. 12, 13. 1906. 



29. - — , Synapsis and synizesis. Ohio Nat. 7 : 4 I_ 48. pi. 4- 1907. 



30. Strasburger, E., Ueber Reduktionstheilung. Sitzungsber. k. k. Preuss. 

 Akad. Wiss. 18:587-614. Jigs. 13. 1904. 



31. — — , Typische und allotypische Kerntheilung. Jahrb. Wiss. Bot. 42:1- 

 71. pi. 1. 1905. 



32. Tischler, G., Zellstudien an sterilen Bastardpflanzen. Archiv Zellforschung 



i'S^S 1 - fi& s - I2 °- I 9° 8 - 



33. Yamanouchi, Shigeo, Sporogenesis in Nephrodiurm Bot. Gazette 45: 



1-30. pis. 1-4. 1908. 



EXPLANATION OF PLATES I-III 



The figures were drawn with the aid of a Bausch & Lomb camera lucida. All 

 except figs. 1 and 19 were drawn under a Zeiss apochromatic objective 2 mm ap. 

 1 . 30, with a Zeiss compensating ocular 18. The figures are reduced one-fourth in 

 reproduction, giving a magnification of nearly 3000 diameters. Fig. 1 was drawn 

 under a 2 mm objective and compensating ocular 6; fig. 19 under B. & L. objective 

 tV N. A. 1 .32 and Zeiss ocular 18. 



