PLATE II. 
Figs. 15 and 16. — Longitudinal sections through embryo-sac, showing the 
“egg-apparatus” above, and a free nucleus below, which has travelled 
down towards the “antipodal” mass. 
j’jg, 17 . — Longitudinal section through a whole ovule during fertilisation. 
A pollen tube has penetrated the micropyle, and spread its end on the 
“ synergidse,” below^ and to the side of which is the “ egg cell ;” at the 
opposite end of embryo-sac are the “ antipodal ” cells imperfectly divided, 
aud abutting on these the wandering nucleus from above. 
Fig. 17a. — Similar preparation with egg-cell just fertilised. 
Fig. 18. — The first division across the fertilised “ egg cell” is completed ; 
remains of egg apparatus and cap-cells are seen above, and of “ antipodals ” 
below in the sac. 
Fig. 19. — A division appears across each of the two cells in Fig. 18 ; 
that in the upper cell is not completed. Traces of cap-cdls and egg appa- 
ratus above, and of antipodal cells below, as before. 
Fig. 20. — The embryo now consists of four cells — a “ suspensor ” of 
two cells separated by swollen walls, and an embryo pro>er of two super- 
posed cells, of which each nucleus contains two nucleoli. 
Figs. 21, 22, and 23. — Embryos a little more advancd. The embryo 
proper becoming divided by vertical walls at right auges, comes to con- 
sist of three cells ; the lowermost in fig. 23 is dividing. 
Fig. 24. — The embryo proper consists of four cells, aid the left hand 
lower nucleus has two nucleoli ; the suspensor consisting >f two cells, is in 
the act of forming a bipartition across its upper cells. 
Fig. 25. — The embryo proper has four cells, the suspusor five. Va- 
cuoles are appearing in the cells of the latter. 
Fig. 26. — The embryo proper consists of pight cells, anl the suspensor 
of four. Traces of “ antipodal ” mass still evident. 
Fig. 26 a. — Transverse section of embryo at this sta:ge. 
Fig. 27. — The suspensor possesses three cells, of which the middle one 
has just divided, but the nuclei are not yet completely sepjrated. 
Fig. 28. — A slightly older stage than the last. Each->f the four sus- 
pensor cells has become doubled; vacuoles are appearing, a.d the cell- walls 
are swollen. 
PLATE III. 
Fig. 29. — The suspensor cells are elongating, sap cavties becoming 
established within. The embryo proper still preserves tvelve cells, but 
would soon consist of sixteen, as division appeared in its lowr cells. 
Fig. 30. — By intercalary growth the suspensor has pmied its apex 
through the micropyle ; one more division has occurred abve, but the 
limit is approaching, and the exhausted cells are acquiring largisap cavities. 
A series of tangential divisions has marked out an epiderma layer to the 
embryo proper (optical sec. cleared with KHO). 
Fig. 31. — Similar section of older embryo similarly treatd ; a second 
series of tangential divisions has appeared more internally, an the “ sus- 
pensor ” is shrivelling up, the protoplasm of its cells disappeamg. 
Fig. 32. — External view of ripe seed torn from funiculus. Less magni- 
fied than rest. 
