EXPLANATION OF PLATES 109 
PLATE 11 
Fics, 1-31. Crucianella gilanica 
Fic. 1-13. Pollen tetrad divisions. 
Fic. 1, Chromosome pairs seen during prophase of the first division. 
Fic. 2. Anaphase of the first division; the chromosomes are in various stages of 
separation. 
Fic. 3. The forms assumed by es daughter chromosomes. 
Fic. 4. Daughter chromosomes in later anaphase 
Fic. 5. Chromosome Yes in ias of the first division, 
Fic. 6. End of first division 
Fic. 7. az pairs as seen in A of the second division. 
in 8. Metaphase, second divisi 10 
G. 9. Late anaphase, second division. 
dem IO. Anaphase, second deinen, spindle showing its connection with the 
ectoplasm. 
Fic. 11. Equatorial plate, polar view ; ten chromosomes. 
Fic, 12. Equatorial plate, polar view; eleven chromosomes. 
Fic. 13. End of second division. Drawn to the same scale as fig. 6, for com- 
parison of the size of nuclei 
Fics. 14-25. Embryo: -sac tetrad divisions. 
Fic. 14. Diak 
Fic. 15. دم‎ of rings, the aster-like radiations correspond to those seen 
in Fig. 42. 
Fics. 16, 17. Anaphases, first division. 
Fic. 18, a-g. Forms assumed by the chromosomes during anaphase of the first 
division. 
Fic. 19. Telophase, first division. 
IG. 20. Telophase, first division. 
Fic, 21. Prophase, second division 
22. Mb qt second division. 
Fic. 23. on some pairs an second division. 
rats, second pe visi 
Fic. 25 Er mosomes, a ine Be division. 
Fic. 26. Chromosomes, sph, first division. 
Fics. 27-30 Embryo-sac divisio 
Fic. 27. First embryo-sac aividoas in metaphase. 
Fic. 28. Second embryo-sac division, polar view. 
Fic. 29. Chromosome pairs , second embryo-sac division. 
son. 
Fic, 3t. Mitotic figure from the nucellus. 
Fics. 32-44. Crucianella macrostachya. 
Fics. سوم‎ Pollen tetrad divisions. 
Fic. 32. Prophase, first division. 
Fic. 33. Metaphase, first division: ; ten chromosomes. 
Fic. 34. Very early anaphase, first divisio: 
Fic. 35. even ene a rude one vie in lateral and Zone in polar 
view; ten chromoso: 
G. 36. ee pair, metaphase, second division. 
