280 BOTANICAL GAZETTE [APRIL 
Fic, 10. Ventral canal cell with nucleus developed nearly to the fertiliza- 
tion stage. 
FIGs. I1, 12, 16-19. Stages in development of nucleus of the oosphere, 
Fic. 13. Two male nuclei in end of pollen tube just as it enters the neck 
of the archegonium. 
Figs. 14,15. Nucleoli arranged on linin network; details from nuclei 
slightly older than fg. 72. 
Fic. 19a. Sketch in which 2. 0. shows position of fig. zg and s the posi- 
tion of fig. 32. 
FIG, 20. Fertilization. 
Fig. 21. Later stage in fertilization. 
FiG. 22. First division of the nucleus of the oospore, 
1G. 23. One and part of another of the four segmentation nuclei showing 
felt-like covering, with tangential threads predominating. ae 
FIGs, 24, 24a, First division of one of the four free nuclei after passing 
to the base of the oospore. 
FIGs. 25, 25a. Spirem in nucleus in the partially segmented portion of the 
oospore, 
Figs. 26, 26a. Nuclear figure showing shape of the chromosomes. sy 
Fig. 28. Nucleolus showing deeply staining outer and lightly staining 
inner portions. ” 
1G. 29. Inner portion of nucleolus pressed out from the outer “shel 
Fig. 30. Nucleus of one of the cells sheathing the oosphere, showing the 
twelve chromosomes. ee 
IG. 31. Fragments of the ventral canal cell spindle showing transition 
between spindle fibers and cytoplasmic reticulum. 
Fic. 32. Fragment of spindle. See fig. ga, S. 
