346 BOTANICAL GAZETTE [MAY 
Fic. 16. Antipodal end of embryo sac; antipodals in pocket, and polar 
nuclei meeting in lower end of sac; from section adjacent to fig. 75. 
Fig. 17. Embryo sac after third division, showing the eight-celled stage; 
synergids with vacuoles, egg cell beneath; antipodals in pocket, two with 
nuclei, remnant only of the third one; polar nuclei meeting below the center. 
Fic. 18. A two-celled embryo, showing the large vesicular cell and first 
cell of ico prope 
1G. Ig. A three- nee embryo imbedded in endosperm and suspended 
from the pe? vesicular cell; endosperm of free nuclei embedded in cyto- 
plasm ; each nucleus with two nucleoli. é 
Fic. 20. A four-celled embryo; the end cell divided longitudinally; very 
large vesicular cell with correspondingly large nucleus an nucleolus 
21. An eight-celled embryo; end-cell divided into four cells; very 
large vesicular cell; letters denote points of cross-sections shown in follow- 
ing figures. 
Fic. 21d. Cross-section of end cell through d@ in fig. 27. 
Fic. 21¢. Cross-section through ¢ in fig. 27. 
Fic. 214. Cross-section through 4 in fig. 27. 
FiG. 21a. Cross-section through a in fig. 27. 

