362 BOTANICAL GAZETTE [May 
in the micropylar end; the polar nuclei are moving toward one another, 
X 600. ‘ 
Fic. 5. A. Novae- ite, An eight-nucleate embryo sac; the eg 
apparatus is not yet formed ; the polar nuclei are some distance apart; three 
active nuclei lie in the nucellus below the antipodal region. x 600. 
Fic. 6. A. undulatus. The polar nuclei in the first stage of fusion. 
X 600. 
Fic. 7. A. multifiorus. The polar nuclei in a more advanced stage of 
fusion. X 600. = 
Fic. 8. A. Novae-Angliae. A mature embryo sac. X 600. 
Fic. 9. A. undulatus. An embryo sac in which the fusion of the polar 
nuclei has been delayed and double fertilization is taking place. X 600. 
1G. 10. 4. undulatus. A mature embryo sac showing the structure of 
the surrounding nucellar tissue. X I 40. 
Fic. 11. A. Novae-Angliae. The antipodal region of a mature embryo 
sac, showing a long somewhat enlarged lower cell with two large nuclei. 
600. 
Fig. 12. A. multiflorus. The antipodal region of a young embryo sac, 
showing six cells. X 600. 
Fic. 13. A. muiltifiorus. The antipodal region of a young embryo sac, 
showing two of its cells lying side by side. X 600. 
Fic. 14. A. undulatus. The antipodal region of an older embryo sac ; 
the lowest cell is enlarged and contains nineteen small nuclei. X 600, 
Fig. 15. A. Novae-Angliae. The antipodal region of a matureembryo sac 
showing multinucleate cells. <X 600 
Fic. 16. A. undulatus. An sass sac with an enlarged antipodal cell. 
X 600. 
Fic. 17. A. undulatus. A normal mature embryo sac. X 600. 
Fic. 18, a. A. undulatus. An abnormal mature embryo sac, containing 
anantipodal endosperm nucleus and also an antipodal oosphere which is about 
to be fertilized by a banana-shaped sperm. X 600. 
Fic, 18, 6. The antipodal cells of the embryo sac in fig. 73, @. 
