362 CALIFORNIA ACADEMY OF SCIENCES. [Psoc. 3 d Ser. 



EXPLANATION OF PLATE LI I. 



(Reduced about one-fourth). 



Fig. 22. Embryo-sac showing the beginning of the multiplication of the 

 antipodals: X 320; synergidae in the adjoining figure. 



Fig. 22a. Synergidae of fig. 22. 



Fig. 23. An embryo-sac with young antipodal complex; shows the relation 

 of the embryo-sac to the nucellus: X no. 



Fig. 24. Detail of egg-apparatus: X 320; polar nuclei not yet fused. 



Fig. 25. A longitudinal section of ovule showing nucellus, embryo-sac, one- 

 celled embryo, and the first division of the endosperm nucleus : 



Fig. 26. An ovule with nucellus, two-celled embryo, and dividing endo- 

 sperm nuclei: X 57. 



Fig. 27. Antipodal complex of the embryo-sac shown in the preceding 

 figure: X 80. 



Fig. 28. Antipodals that are undergoing disintegration: X 80. 



