422 BOTANICAL GAZETTE [JUNE 
Fic. 13. Spindles of the third nuclear division, showing transverse syn- 
ergid spindle, longitudinal polar nuclei spindles, and an antipodal spindle. 
Zpy L4. 
Fig. 14. Same stage, with radiations more evident, equatorial thickening, ] 
and a very evident antipodal spindle. Z jy L4. - 
Fic. 15. Same stage further advanced. Z}; L4. 
Fic. 16. Completed eight-celled stage. R+ R4q. = 
Fic. 17. Embryo sac, showing wall at antipodal and micropylar ends, the S 
, latter cutting off the synergids, the former one antipodal cell, and the definitive 
nucleus dividing. B& L+y R4. * 
Fig. 18. LZ. tigrinum; polar nuclei fusing. B & Ly R4. 
Fig. 19. L, “igrinum, pollen tube with the cadart male nucleus disin- 
tegrating and the tip of the tube ruptured; fusing sex nuclei, the male upper- 
most; fusing polar nuclei, but the small part of the upper one showing. , 
B & Ly Ry. : 
Fic. 20. LZ. tigrinum, pollen tube bent sharply towards oosphere, with 
disorganized tip, the nucleus near its tip being that of persistent synergid ; = 
fusing sex nuclei, the male on the left. B& Li; R4. 
Fic. 21. Fusing sex nuclei, with paired centrosomes. B & Ly; R4. 
Fic. 22. L. tigrinum ; fusion of sex nuclei about completed; persistent 
synergid nucleus above. B & L,'; R4. 
F1G. 23. Oospore with broad basal attachment, and the fusion nucleus in 
apical position ; nucleus of persistent synergid still visible. B & Li's 
_ F1G. 24. Young embryo, showing first division transverse, second division 
basal and longitudinal; pollen tube with ruptured tip and a remarkably per- 4 
‘sistent male nucleus. B & Ly, R4. . 
_ Fi. 25. Same, but second division transverse. B & Liy R4. : | 
| Figs. adie Young embryos, showing various phases of division and the 
d basal region. B & L+; R4. 
oo 31-32. More = advanced embryos. B& bee R4. 
ie. 33. . Advanced embryo, showing develoy of the suspensor region — 
1 . Bt R4. | 
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si gee ee Sgt: Pay ce ed 
mt. wing remark- 
ion s about the dangheer nuclei. B ay iw ry ‘Safranin 
. Emb aoa ie. free endosperm nuclei, the ‘caecum-like a 
of hs capernmede the e three — — ancl o 
