294 CAMPBELL: EMBRYO-SAC OF PANDANUS CORONATUS 
FicurE 1 shows a section of an ovule containing the nearly 
mature embryo-sac. At the micropylar end is a nearly typical 
egg-apparatus consisting of two synergids and the elongated egg, 
o. These are shown more enlarged in FIGURE 2. At the chalazal 
end is a large discoidal mass of cells, the antipodal cells, the exact 
number of which was not ascertained, but it probably is variable. 
Above the antipodal tissue are two large free nuclei which probably 
Explanation of figures 1-6 
1. A nearly median section of an ovule of Pandanus coronatus, shortly before 
ee Xx abou 
sections of the egg-apparatus from the same embryo-sac, X 320; Ant., 
ak: plist E.N., polar nucleus; Sy, synergid; 0, egg-cell. 
3. a. Upper part of a somewhat older ovule, showing the entrance of the pollen- 
tube, P. T., X 320. b. The second synergid and egg from the 
4, 5. Two sections of the antipodal cells from the peat -sac shown in fig. 2. 
There were three “‘polar’’ nuclei, E 
6. Antipodal region from an embryo-sac with six polar nuclei, of which four 
are shown in the figure 
