SAX: FERTILIZATION IN FRITILLARIA PUDICA 521 
11. —— Ueber die Befruchtungsvorginge bei einiger Dicotyledonen. 
Ber. Deutsch. Bot. Ges. 18: 224-230. pl. 9. 1900. 
12, Ueber das selbstandige Bewegungsvermégen der Sperma- 
kerne bei einigen Angiospermen. Oesterr. Bot. Zeitsch. 59: 
457-467. 1909. 
13. Strasburger, E. Ueber Kern- und Zelltheilung im Pflanzenreiche, 
nebst einem Anhang iiber Befruchtung. Histol. Beitr. 1. 
Jena. 1888. 
14. Welsford, E. J. The genesis of the male nuclei in Lilium. Ann. 
Bot. 28: 265-270. pl. 16,17. 1914. 
Explanation of plates 27-29 
All drawings were made with the aid of the camera lucida. All figures were 
drawn from single sections. The magnificaticn is as follows: Fic. 8, 520 diameters; 
Fics. 1, 30-39, 720 diameters; Fic. 2, 750 diameters; FIGS. 3-7, 9, 10-29, 1,120 
diameters. - 
PLATE 27 
I. Micropylar end of the embryo sac in section, showing entrance of 
pollen ‘he. with disorganized red bodies—a portion of one synergid—one male 
nucleus coming in contact with the egg nucleus on the under side, and the second 
male nucleus in the cytoplasm of the ‘‘Endospermanlage”’ on its way to the upper 
polar nucleus. 
IG. 2. Section of upper part of embryo sac showing one of the male nuclei 
on way to polar nucleus. 
IGS. 3A, 3B, 3C. Consecutive longitudinal sections of a pollen tube after 
entering the embryo sac. The two male nuclei, (a) and (6), stain darker than the 
vegetative nuclei. Two vegetative nuclei are shown, (c) and (d). 
Fic. 4. Male nucleus coming in contact with the egg nucleus. 
IG. 5. Male nucleus almost to upper polar nucleus. 
Fic. 6. Male nucleus coiled and twisted, on way to upper polar nucleus. 
Fic. 7. Male nucleus on way to upper polar nucleus. 
Fic. 8. Male nucleus touching the egg nucleu 
Fic. 9. Pollen tube containing the two dark eae which show nuclear struc- 
"6 10. Male nucleus coiled and in contact with the egg nucleus. 
Fic. 11. Male nucleus in contact with egg nucleus. 
PLATE 28 
Fics. 12, 13. Male nucleus in contact with egg nucleus. 
Fic. 14. A later stage. The male nucleus has lost its vermiform shape and 
its earlier net-like structure. 
IG. I5. Male nucleus in indentation of egg nucleus. 
Fics. 16, 17, 18. Male nucleus and egg nucleus fusing. 
Fic. 19. Egg cell with male nucleus and gs nucleus completely fused. 
Fic. 20. ons fusion of egg and male nucleus. 
Fic. 21. Case of formation of spireme tec complete fusion. 
Fic, 22, Egg cell cuitee the fertilized egg in early spireme. 
