276 2\ansactions of the Society. 



proved a great incentive to research — particularly in the problem 

 of sex — its major premise, the reality of synapsis, is in no way 

 firmly established ; further knov^ledge of the relation of chromo- 

 somes to the organization of the resting-nuclei and a specialized 

 study of individual heterotype chromosomes constitute, therefore, 

 two of the most imperative needs of cytological theory to-day. 



Bibliography of more Important Papers containing a 

 General Discussion of the Problem of Synapsis. 



1. Agar (1912). — The Spermatogenesis of Lej)idosiren ])aradoxa. Q.J.M.S.^ 



voL 57. Transverse Segmentation and Internal Differentiation of 

 Chromosomes. Q.J.M.S., voL 58. 



2. Arnold (1909). — The Prophase in the Ovogenesis, etc., of Planaria. 



ArchZellf.,3. 



3. BucHNER (1909). — Das Accessoriche Chromosom im Spermatogenese 



und Ovogenese der Orthoptera. Arch. Zellf. 3. 



4. DiGBY (1919). — The Archesporial and Meiotic Mitoses of Osmunda, 



Ann. Bot., No. 130. 



5. DuESBERG (1909). — Note complementaire sur la spermatogenese du rat. 



Arch. Zellf., 3. 



6. Farmer (1912). — Telosynapsis and Parasynapsis. Ann. of Bot., vol. 26. 

 and Moore (1905). — The Meiotic Phase in Animals and Plants. 



Q.J.M.S., vol. 48. 



7. Gates (1911). — The Mode of Chromosome Pteduction. Bot. Gaz., 51. 



8. Gelci (1913). — Tiber die Ovogenese von Dendrocoelium. Arch. Zell- 



porsch., Bd, 11. 



9. Gregoire (1910). — Les cineses de maturation dans les deux regnes. 



La Cellule, 26. 



10. Hogben (1920). — Studies on Synapsis. I-II. Proc. Roy. Soc, vol. 91. 



11. Janssens (1905). — Evolution des Auxocytes males du Batsachosaps. 



La Cellule, 22. 



12. McClung (1914). — A Comparative Study of the Chromosomes in 



Orthopteran Spermatogenesis. Journ. Morph., 25. 



13. Meves (1908). — Die Spermatocytenterlungen bei des Honigbeine. 



Arch. Mikr. Anat., 70. 



14. Morse (1909).— The Nuclear Components of the Sex Cells in Four 



Species of Cockroaches. Arch. Zellf. 3. 



15. Nakahara (1919). — Spermatogenesis of Perfa, etc. Journ. Morph., 33. 



16. Payne (1914). — Chromosomal Variation, etc., in Forficula, Journ. 



Morph., 25. 



17. Schreiner, a. & K. E. (1906). — Neue Studien iiber die Chromatin des 



Geschlechtzellan. Arch, de Biol., 22. 



18. "Wenrich (1917). — Synapsis and Chromosome Organization in Steno^ 



bothrus and Inmerotropis. Journ. Morph., 29. 



19. Wilson (1919).— Studies in Chromosomes. VIII. Journ. Exper. 



Zool., 13. 



20. Winiwarter & Sainmont (1909). — Nouvelles recherches sur I'ovogenese 



et Torganogenese des mammiferes. Arch, de Biol., 24. 



